MS3008 Datasheet with Product Specification
SimGEN
®
Software Suite for
Spirent GNSS Constellation
Simulation Systems
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
PROPRIETARY INFORMATION
THE INFORMATION CONTAINED IN THIS DOCUMENT IS THE PROPERTY OF SPIRENT COMMUNICATIONS PLC. EXCEPT AS SPECIFICALLY
AUTHORISED IN WRITING BY SPIRENT COMMUNICATIONS PLC, THE HOLDER OF THIS DOCUMENT SHALL KEEP ALL INFORMATION CONTAINED
HEREIN CONFIDENTIAL AND SHALL PROTECT SAME IN WHOLE OR IN PART FROM DISCLOSURE AND DISSEMINATION TO ALL THIRD PARTIES TO
THE SAME DEGREE IT PROTECTS ITS OWN CONFIDENTIAL INFORMATION.
© COPYRIGHT SPIRENT COMMUNICATIONS PLC 2019
The ownership of all other registered trademarks used in this document is duly acknowledged.
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Purpose of this document
This document describes the principal features and capabilities of a comprehensive suite of Scenario definition and simulator
control software called SimGEN
®
for Windows (“SimGEN
®
”) which, when combined with a compatible Spirent GNSS signal
generator system, can be used to stimulate the GNSS signal and environment of a satellite navigation receiver system in a
laboratory environment.
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Table of Contents
Purpose of this document ........................................................................................................................ 2
Table of Contents .................................................................................................................................... 3
List of Tables ........................................................................................................................................... 5
List of Figures .......................................................................................................................................... 5
Scope and applicability ............................................................................................................................ 6
Introduction .............................................................................................................................................. 6
Systems ................................................................................................................................................... 8
SimGEN
®
features ................................................................................................................................... 9
Functional description ........................................................................................................................ 9
Phase 1 - Test definition ........................................................................................................................ 9
Phase 2 - Real time simulation .............................................................................................................. 9
Phase 3 – Post simulation analysis ..................................................................................................... 10
SimGEN
®
Graphical User Interface ................................................................................................. 10
Scenario Tree ....................................................................................................................................... 10
Vehicle (antenna) position, motion and received signals displays ...................................................... 11
Satellite ground tracks and sky plot ..................................................................................................... 11
Source types .................................................................................................................................... 12
Satellite modelling ............................................................................................................................ 13
Ground-segment modelling .............................................................................................................. 15
Atmospheric modelling ..................................................................................................................... 16
Vehicle modelling ............................................................................................................................. 18
Simple motion ................................................................................................................................... 18
Rectangular racetrack .......................................................................................................................... 18
Circular motion ..................................................................................................................................... 19
Aircraft .................................................................................................................................................. 20
Ship ...................................................................................................................................................... 21
Land Vehicle ........................................................................................................................................ 21
Spacecraft ............................................................................................................................................ 22
User trajectory .................................................................................................................................. 23
External trajectory - hardware-in-the-loop (HIL) ............................................................................... 23
Terrain obscuration .......................................................................................................................... 24
Antenna modelling ............................................................................................................................ 24
Multipath modelling .......................................................................................................................... 26
Multi-copy constellations (licenced feature for GSS9000 only) ....................................................... 28
2-vehicle to 1RF (licenced feature for GSS9000 only) ..................................................................... 28
Ground-based interference (GTx) (licenced feature for GSS9000 only) ......................................... 28
Data access ...................................................................................................................................... 28
Quick look ............................................................................................................................................ 29
Data storage ......................................................................................................................................... 30
Data streaming ..................................................................................................................................... 30
Data capture ......................................................................................................................................... 31
NMEA data capture .............................................................................................................................. 31
GNSS signal constellation types ...................................................................................................... 32
Hardware supported ............................................................................................................................ 33
SimGEN
®
Support for Previous Generator Platforms .......................................................................... 33
Commercial extensions .................................................................................................................... 35
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
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Interference simulation .........................................................................................................................35
Spoofing simulation ..............................................................................................................................35
Automotive extensions .........................................................................................................................35
Ground based augmentation systems ..................................................................................................35
Authorised testing extensions ...............................................................................................................37
Inertial simulation extensions ...............................................................................................................37
SA/A-S extensions ................................................................................................................................37
GPS M-Code extensions ......................................................................................................................37
Galileo FOC extensions ........................................................................................................................38
Galileo PRS extensions ........................................................................................................................38
Warranty and support .......................................................................................................................38
Spirent Support Service Plans ..............................................................................................................38
Referenced documents ..........................................................................................................................39
External documents ..........................................................................................................................39
Related Spirent product specifications/documents ...........................................................................40
Related military/government product specifications .........................................................................40
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List of Tables
Table 1 Current generator platforms supported by SimGEN
®
.............................................................. 33
Table 2 Previous Generator Platforms supported by SimGEN
®
........................................................... 33
List of Figures
Figure 1 Example SimGEN
®
-based GNSS simulation systems ............................................................. 8
Figure 2 GSS7000 chassis. ..................................................................................................................... 8
Figure 3 Example of SimGEN’s Graphical User Interface ...................................................................... 9
Figure 4 Typical source editors ............................................................................................................. 12
Figure 5 Typical Constellation Editor – GPS shown ............................................................................. 13
Figure 6 Satellite ground tracks ............................................................................................................. 14
Figure 7 Signal Content Definition – GPS Shown ................................................................................. 15
Figure 8 Atmospheric Model Coefficients .............................................................................................. 16
Figure 9 Personality editor defining vehicle performance envelope...................................................... 18
Figure 10 Racetrack editor .................................................................................................................... 19
Figure 11 Circular motion editor ............................................................................................................ 19
Figure 12 Aircraft motion command editor ............................................................................................ 20
Figure 13 Spacecraft position editor ...................................................................................................... 22
Figure 14 Terrain obscuration editor ..................................................................................................... 24
Figure 15 Antenna pattern editor ........................................................................................................... 25
Figure 16 Antenna lever arm ................................................................................................................. 26
Figure 17 Sim3D™ environment representation ................................................................................... 26
Figure 18 Statistical multipath category mask editor ............................................................................. 27
Figure 19 Quick Look Selection and Logging........................................................................................ 29
Figure 20 Data streaming ...................................................................................................................... 31
Figure 21 Signal type selection ............................................................................................................. 32
Figure 22 GBAS message type 1 and 2 editor examples ..................................................................... 36
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
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Scope and applicability
This document describes the principal features and capabilities of a comprehensive suite of Scenario
definition and simulator control software called SimGEN® for Windows (“SimGEN®”) which, when
combined with a compatible Spirent GNSS signal generator system, can be used to stimulate the
GNSS signal and environment of a satellite navigation receiver system in a laboratory environment. A
system may be augmented with a range of optional elements including Interference generators, and
Inertial emulators, all controlled via SimGEN
®
In a Spirent GNSS simulator system, neither the signal generator(s) nor the PC/Host with installed
SimGEN
®
software is available separately.
The control interfaces between these elements are proprietary to Spirent and are protected. SimGEN
®
software requires a licence, both to open and to access purchased functionality.
The GSS7000 is delivered with an embedded controller, the GSS9000 simulator is delivered with a
C50r dedicated host.
The full issue of this document shall form the basis of any sales contract. In order to determine
the detail of all features available in SimGEN
®
it should be read in conjunction with the latest
issue SimGEN
®
Software User Manual (see reference [10] in Related Spirent product
specifications section, page 40) and appropriate signal generator product specifications (refer
to [1] & [8] Error! Reference source not found.on page 38).
Spirent GNSS simulator systems support public-domain signals, but some can be upgraded for
authorised users only to generate authorised signals using combinations of hardware upgrades and
additions to SimGEN
®
Spirent regularly updates SimGEN
®
software. As such, graphical
representations of the software appearing in this document should be considered as typical and for
illustrative purposes and are subject to change and enhancement.
Introduction
Spirent provides a large range of GNSS RF Constellation Simulators.
Simulators emulate the presence of one or more GNSS constellations for use in laboratory, office or
production environments in a development, qualification, certification or integration test role and for
evaluating GNSS receiver equipment performance. Systems can be stand-alone or integrated into
larger hardware-in-the-loop test systems using interfaces included as standard.
Spirent has a long and successful track record in providing GNSS simulators of the highest fidelity and
scope.
When operated with SimGEN
®
executive software, the comprehensive and flexible nature of Spirent’s
GNSS RF Constellation simulator products ensures that user equipment being stimulated behaves as
if it were receiving RF signals from real satellites when installed on a vehicle including when
performing complex and/or high-speed manoeuvres.
Standard capabilities enabled through SimGEN
®
include simulation of atmospheric degradation of
signals, multipath reflections, terrain obscuration, antenna reception gain and phase patterns,
differential corrections, trajectory generation for land, air, sea and space vehicles and comprehensive
error generation and system modelling.
These products can virtually eliminate the need to perform expensive field trials and provide an
accurate, repeatable and controllable tool, free of the constraints imposed by testing in an operational
system environment using actual satellite signals.
GNSSs comprise constellations of satellites capable of supporting precise positioning, navigation and
timing.
The GLOBAL POSITIONING SYSTEM or GPS was conceived by the United States of America as a
military navigation system, but via Presidential Directive has committed to provision of three purely
civil signals. The GPS modernisation programme adds two new civil signals at L2 and L5 to the C/A
code at L1, adds a new military signal (M-Code) at L1 and L2, and an additional civil signal at L1.
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GLONASS is a Russian system similar in principle to GPS but which currently uses FDMA rather than
CDMA to differentiate between satellite signals. Only the C/A civil signal with its navigation data
message is officially available at both L1 and L2 for general use, although the precise military P-code
is also used.
Galileo is a European constellation of earth-orbiting satellites capable of supporting precise
positioning and navigation for both world-wide terrestrial and earth orbiting vehicles. The system
provides a number of navigation and positioning services, including a free-to-use Open Service (OS),
a Commercial Service (CS) a Safety-of-Life service (SOL), Search And Rescue (SAR) services, and a
Public Regulated Service (PRS) for approved users that incorporates classified encryption and
unauthorised access control.
BeiDou-2/3 is a Chinese regional satellite navigation system covering China and much of Asia and
comprises principally GEO and IGSO satellites but also has a limited Global coverage via its MEO
satellites. BeiDou is currently deployed in its second phase which is designated as BeiDou-2. A third
phase, BeiDou-3, will add signals and frequencies as it expands into a full GNSS. The regional BD-II
system provides two carrier frequencies and both Open and Closed access signals. BeiDou provides
an SBAS component via its own GEOs.
Satellite Based Augmentation Systems (SBAS) provide enhanced accuracy, availability and
integrity for GPS users in the civil community via one or more Geosynchronous satellites. WAAS
(Wide Area Augmentation System) is a system under the auspices of the United States Department of
Transport that covers the continental United States. Similar compatible systems are European
Geostationary Navigation Overlay System (EGNOS) and the MSAS in Japan (see reference [3] in
External documents section, page 39).
Spirent systems support SBAS at GPS L1 and L5.
Quazi-Zenith Satellite System is a constellation of IGSO satellites operated by Japan to provide
regional civil GPS augmentation at all GPS frequencies for enhanced urban canyon coverage.
Spirent systems support QZSS at L1, L2 and L5
IRNSS (Indian regional navigation satellite system), with an operational name of NavIC, is an
autonomous regional satellite navigation system that provides accurate real-time positioning and
timing services. It covers India and a region extending 1,500 km around it, with plans for further
extension. The IRNSS constellation consists of seven satellites, three in geostationary orbit and four
in geosynchronous orbit. All satellites will be continuously visible from India for 24 hours a day.
Spirent systems support IRNSS at L5 and S-band.
In future SimGEN
®
will be upgraded to cover additional GNSS and related signals when their ICDs
become available. Please contact your Spirent representative for further information about new
signals. In some cases, systems with a valid support contract will be upgraded for new signals as they
become supported in SimGEN
®
. In some cases, additional licences and/or hardware upgrades may
be required.
For current ICD compliance, please refer to External documents section, page 39).
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
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Systems
A GNSS RF Constellation Simulation system comprises two major sub-systems as shown in Figure 1.
Figure 1 Example SimGEN
®
-based GNSS simulation systems
• A dedicated, Spirent proprietary designed host (for GSS9000) running SimGEN
®
that
provides the comprehensive modelling capabilities described in this document.
• One or more sophisticated RF signal generators.
Together, these elements combine to generate high-dynamic RF simulations that represent both
varied and challenging environments.
The GSS7000 platform operates autonomously with an embedded controller, peripherals are optional
and can be customer furnished.
Figure 2 GSS7000 chassis.
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Figure 3 Example of SimGEN’s Graphical User Interface
SimGEN
®
features
Functional description
SimGEN
®
operates in three phases.
Phase 1 - Test definition
The user defines and configures a set of information files (Source Files), using the comprehensive
tools provided, that describe the trajectory of the simulated vehicle position and the complete Satellite
operating environment. The collection of source files is known as a Scenario.
Importantly, SimGEN
®
calculates all simulation output in real-time, and hence this initial phase does
not require pre-processing.
Phase 2 - Real time simulation
SimGEN
®
runs the relevant models using the source files that were defined in Phase 1 and in real-
time compiles the required data streams that drive the RF signal generator and on-screen displays.
The resulting RF signals are used to stimulate the satellite navigation receiver input.
During this phase, the user has extensive, asynchronous access allowing changes to the pre-defined
conditions that were specified in phase 1. This includes the ability to vary power levels, to apply
Pseudorange Steps/Ramps, to create some Multipath reflections and to ‘Ban’ or ‘Force’ satellite
selection. These User Actions are recorded to a script file to aid post-run analysis or to allow the same
actions to be replayed in subsequent runs of this or other simulations. This script file may be edited
and expanded to customise the actions for subsequent runs.
The user also has the ability to define and display tabular and graphical representations of parameters
being generated, such as graphs of Latitude versus Longitude. The list of parameters selected for
tabular display may be recorded, allowing simple re-use of the same parameter list in other
simulations.
Data generated during phase 2 may be saved to a file for subsequent analysis. The user may specify
all available data or selected subsets of particular interest.
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SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
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Powerful facilities are provided for performing scripted events that locally use commands identical to
those provided by the remote control function. Most of the interactions that may be performed
manually during a simulation run may also be performed in this mode.
Facilities are also provided to run a sequence of scenarios consecutively from a command file.
Phase 3 – Post simulation analysis
The operator may generate tabular and graphical representations of data optionally stored in phase 2
using any commercial package compatible with Microsoft Windows® that supports Comma Separated
Variable file data, such as a spreadsheet.
SimGEN
®
Graphical User Interface
SimGEN
®
has an intuitive GUI with a combinations of data editing and entry windows and
data/information display windows. The principal areas are:
Scenario Tree
The scenario tree contains all the editable files which form a test scenario. Key files being those
defining the Constellation Signal Sources, the Vehicle, Antenna, atmosphere and Options. The
Scenario tree is shown in
Figure 4 Scenario tree
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Vehicle (antenna) position, motion and received signals displays
Various information pertaining to the simulated position, time, date, motion characteristics and the
signal properties (received power, pseudoranges etc. are conveniently displayed as shown in Figure 5
Figure 5 Vehicle (antenna) position, motion and received signals displays
Satellite ground tracks and sky plot
The positions of satellites simulated and those visible to the antenna at the simulated receiver
location, together with a sky plot are displayed as shown in Figure 6
Figure 6 Satellite ground tracks and sky plot
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
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Source types
Test scenarios are defined using a collection of data source and scenario files defined by the user.
The non-exhaustive simulated parameters listed below are all user-definable:
• Start Time and Date
• Definition of the appropriate GNSS Constellation(s)
• Atmospheric parameters for both the Ionosphere (from reference [1] in External documents
section, page 39) and Troposphere. An additional Ionospheric model suitable for
spacecraft is included.
• Vehicle performance envelope - Personality
• Antenna placement and orientation
• Satellite TX and receiver RX Antenna Patterns (Gain and Phase)
• Vehicle motion commands (Initial position and 6-DOF trajectory definition for one or
multiple vehicles/antennas)
• Multipath definition
• Terrain obscuration
A ‘shared’ folder can be used to store favourite source files for rapid re-use in multiple different
scenarios as required.
Figure 7 Typical source editors
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Satellite modelling
SimGEN
®
is able to calculate the positions and velocities of up to 63 navigation satellites per
constellation (using the extended constellation) in user-defined constellations. Definition of the
constellations is via comprehensive file editors, Figure 8 that independently describe the orbits of the
satellites in the terminology of the relevant ICDs (see references [1], [2], [3], [5], [7], [8], [10] and [11]
in External documents section, page 39 .
Figure 8 Typical Constellation Editor – GPS shown
SimGEN
®
then calculates the orbital trajectory plus Almanac and Ephemeris data. A utility is also
provided to create a constellation file from an ASCII source conforming to the US Coast Guard
'YUMA', RINEX and SEM formats.
SBAS satellites principally for augmentation of GPS, are separately specified in terms of PRN identity,
position and power level. The user may specify clock bias terms and Issue of Data update times plus
satellite residual motion. Three independent SBAS systems are supported simultaneously (WAAS,
EGNOS & MSAS).
The signals from the satellites visible at the simulated vehicle position may be generated
simultaneously at each available RF output, the number of signals and type being dependent on the
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®
Software Suite for Spirent GNSS Constellation
Simulation Systems
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signal generator hardware connected, and the available licence keys. The software applies the user-
specified Dilution-of-Precision (DOP) algorithm to determine and optimise the simulated set at regular
user-specified intervals during the simulation. Various DOP options are supplied including GDOP,
PDOP, HDOP, VDOP and TDOP.
A facility is also supplied to superimpose undeclared clock biases and ramps onto the simulated
signals, allowing RAIM testing of receivers.
Modelling of intentional GPS satellite clock degradation, which forms part of the US DoD Selective
Availability implementation, is supplied using freely published material. Models supplied include, first
and second order Gauss-Markov processes, digitally-filtered noise and a sum of sinusoids.
Figure 9 Satellite ground tracks
A wide range of user controls and error functions are also supported including the ability to enable or
suppress elements of the transmitted signals on a per-satellite basis. This includes specifying the
combination of the various ranging codes present on each of the available carrier frequencies as well
as the Navigation Data message.
It is also possible to independently set the effective transmitted power of each satellite plus other
parameters such as Inter-carrier group delay and even schedule the removal of an entire satellite from
the constellation. Note that controls require appropriate hardware and licences.
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Figure 10 Signal Content Definition – GPS Shown
Ground-segment modelling
SimGEN
®
allows the user to command a variety of Ground Segment activities.
A facility is provided to periodically remove any satellite from the simulated constellation and for this to
be reflected in the transmitted Navigation Data message where appropriate.
The Navigation Data message associated with each satellite signal and service is automatically
compiled into its respective format. Where the data is structured as messages that are broadcast on a
schedule which is not fixed, such as for SBAS, GPS L2C, L5, and M-code (SimMCODE and
SimMNSA upgrade required for M-code) facilities are included to define the rate or sequence at which
the individual message types are broadcast.
Any Ephemeris or Almanac is derived directly from the orbital definition specified by the user. The
data is extrapolated from the time-of-validity in the source file to the value that would be valid at the
simulated time, including divergence after upload. This relieves the user of the need to relate
constellation file data to simulation date and time. Data uploads and Ephemeris cutovers are fully
supported where appropriate.
All GPS capability is fully compliant for testing End-of-Week and Week 1024 rollovers as well as leap
second transition events.
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®
Software Suite for Spirent GNSS Constellation
Simulation Systems
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Facilities are provided to specify the satellite health data fields and to manipulate various specific data
fields and flags in the data messages. In addition, bit-wise message editors are included that allows
manipulation of any field though bit forcing, clearing and inversion, whilst maintaining valid parity.
SBAS data messages (see reference [3] in External documents section, page 39), are fully supported
and draw upon the error data generated by the various navigation satellite error models to define their
content. The user may specify a network of up to 50 ground-station monitor locations and SBAS data
messages are only generated for navigation satellites that are visible to that network.
SBAS data may also optionally be taken from a disk file prepared off-line.
For GPS constellations only, an alternative expert method of constellation and data message content
definition is supported using ASCII files containing actual broadcast legacy navigation data content.
SimGEN
®
supports the definition and modelling of the inter-system timing and time-base differences
that exist between different constellations.
SimGEN
®
also compensates its data in respect of the different geodetic reference frames (e.g. WGS-
84) employed by the various constellations and satellite systems.
Atmospheric modelling
Satellite signals contain correction coefficients in their navigation message structure to support
correction of Ionospheric delay on the transmitted signal. Inclusion of Ionospheric and Tropospheric
effects (including a Wet/Dry element) is fully supported by SimGEN
®
.
Separate modelling coefficient sets are provided; one set applied to the RF signal and one set for
subsequent navigation message uploads; see Figure 11. Deliberate divergence between the data in
the RF and data broadcast sets allows pseudorange errors to be introduced.
Figure 11 Atmospheric Model Coefficients
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Delay is added to the true range of generated signals as appropriate to the carrier frequency of the
simulation channel, taking proper account of code-to-carrier dispersion.
Ionospheric delay is added to the signal in accordance with the Klobuchar model defined in reference
[1] in External documents section, page 39. For Galileo appropriate NeQuick model coefficients are
derived from this, as is the IRNSS grid iono model.
For Spacecraft scenarios where the terrestrial models do not necessarily apply, a Total-Electron-
Count (TEC) model is supplied (see reference [6] in External documents section, page 39). The
operator may select from the following TEC model variants:
• Constant defined by operator
• Polynomial (fifth order) variation with height above reference
• Constant with sinusoidal variation with time, parameters specified by the operator
• Polynomial variations with height and sinusoidal variation with time
• Solar elevation relative term
• Polynomial variation with height and solar elevation relative term.
It is possible to perform a phased transition from the Terrestrial to the TEC model at a user-defined
altitude for a simulated spacecraft launch or re-entry trajectory that is provided in a file or via remote
control.
Changes to code and carrier phase and power level can also be applied by direct command over the
SimREMOTE
®
interface. This method allows data from external models or real-world observed events
to be used to manipulate the simulated RF signal. For example, observed ionospheric scintillation
events can be faithfully recreated in the simulator using remote commands to apply sets of data.
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®
Software Suite for Spirent GNSS Constellation
Simulation Systems
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Vehicle modelling
SimGEN
®
is supplied complete with a range of vehicle trajectory models and data converters. These
are designed to provide the user with all the tools necessary to describe complex dynamics that
exercise all aspects of satellite tracking ability in the receiver or system under test.
All vehicle models generate trajectories centred on the vehicle itself. Additional dynamics and
positional offsets due to user-specified antenna placement (lever arm) are fully supported by all
models. Geodetic data for these models are calculated in the WGS-84 ellipsoid reference frame.
Each of the vehicle models describes in the following sub-sections support a range of manoeuvres
that incorporate full 6-degrees-of-freedom (6DOF) motion. The principal motions for each vehicle are
listed together with vehicle specific notes.
A user-defined vehicle personality that operates in 6DOF serves to ensure that manoeuvres don’t
exceed user-defined limits (excludes simple motion models) or to characterise the manoeuvre
dynamics.
Figure 12 Personality editor defining vehicle performance envelope
Please note for each of the Terrestrial vehicle types, all manoeuvres start and finish with the vehicle in
a straight and level orientation.
Simple motion
Rectangular racetrack
Note, this model is particularly relevant to 3GPP testing of A-GPS mobile telephones.
DIMENSIONS Specify track dimensions and corner radius.
INITIAL STATE Specify start point and whether travel is clockwise or anti-clockwise.
DYNAMICS Specify acceleration distance, minimum speed when cornering and maximum
speed on linear sections.
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REFERENCE Specify location of bottom left corner.
ORIENTATION Rotate entire track through the specified number of degrees.
Figure 13 Racetrack editor
Circular motion
Specify centre location and radius of circular motion, speed, direction and start bearing.
Figure 14 Circular motion editor
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®
Software Suite for Spirent GNSS Constellation
Simulation Systems
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Aircraft
REFERENCE Specify initial 3D position, heading and speed.
STRAIGHT
Maintain current altitude above the WGS-84 ellipsoid and maintain current
horizontal speed and direction (Constant Heading or Great Circle) for the
specified duration or distance travelled. Optionally apply axial yaw or pitch or roll
offset.
ACCELERATE Maintain current altitude, heading, and level attitude with respect to the WGS-84
ellipsoid whilst applying either the specified horizontal speed change (positive or
negative) over the specified duration in seconds or distance in metres, or the
specified final speed.
TURN Maintain current altitude above the WGS-84 ellipsoid and horizontal speed whilst
changing heading incrementally by the specified amount in degrees at the lateral
acceleration specified in reference [7] in External documents section, page 39.
In order to maintain the aerodynamic nature of the turn and prevent side-slip, the
simulated aircraft will bank at rates consistent with the vehicle performance
envelope (personality) specified by the user.
CLIMB Maintain linear speed and heading, but incrementally change height by the
specified amount (positive or negative) at the specified climb rate. The change
from/to straight and level flight is governed by user-specified lateral
accelerations.
An optional pitch component can be added to aid in landing simulation.
WAYPOINT Describe a trajectory to intercept specified geodetic WGS-84 co-ordinates from
current position at current speed. A lateral acceleration is specified for use when
calculating trajectories between successive waypoints.
Other COMBINED ACCEL/TURN Changes are incremental only.
COMBINED ACCEL/TURN/CLIMB. Changes are incremental only.
HALT
Figure 15 Aircraft motion command editor
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Ship
REFERENCE Specify initial 2D position, heading and speed.
STRAIGHT
Maintain current speed and direction (Constant Heading or Great Circle) for the
specified duration or distance travelled.
ACCELERATE Maintain current heading whilst applying the specified horizontal speed change
(positive or negative) over the specified duration in seconds.
TURN Maintain horizontal speed whilst changing heading by the specified amount in
degrees over the duration specified. In order to simulate the outward ‘heel’
effect, the simulated ship will roll to the nominal angle specified at a rate
consistent with the vehicle performance envelope (personality) specified by the
user.
WAYPOINT
Describe a trajectory to intercept specified geodetic WGS-84 co-ordinates from
current position at current speed. The maximum heel angle applied in navigating
between successive waypoints is user specified.
Others HALT
Notes:
• Apart from the WAYPOINT and HALT commands, all manoeuvres are incremental.
• A sea-state model is included where the user may specify up to 10 different levels of wave
severity. Each manoeuvre may be associated with a particular sea-state. The sea-state
model will modulate the trajectory as appropriate applying pitch, roll and heave motion.
Land Vehicle
REFERENCE Specify initial 3D position, heading and speed.
STRAIGHT Maintain current height above the WGS-84 ellipsoid and maintain current
horizontal speed and direction (Constant Heading or Great Circle) for the
specified duration or distance travelled.
ACCELERATE
Maintain heading whilst accelerating to the specified speed over the specified
distance in metres. Vehicles may travel forward or in reverse.
TURN Maintain horizontal speed and height whilst either changing heading to that
specified or by the amount specified with the specified turn radius. No ‘rolling’ of
the chassis is simulated.
CLIMB Maintain linear speed and heading, but change height above the WGS-84
ellipsoid either to that specified or by the value specified within the specified
horizontal distance travelled. The change from/to straight and level attitude is
governed by a user-specified smoothness factor.
WAYPOINT
Describe a trajectory to intercept specified geodetic WGS-84 co-ordinates from
current position at current speed. The turn radius to be implemented in
navigating between successive waypoints is specified.
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SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
22 | spirent.com
Others HALT
Note: All manoeuvres can be configured to be absolute to aid translation from a map or similar.
Spacecraft
The Spacecraft Vehicle trajectory model allows initial definition of Earth Orbit in a number of forms, all
of which support attitude orientation as Earth, Sun or Inertial Pointing mode and specification of initial
attitude. The current attitude orientation mode can be switched to another at any time during the
simulation. All support a full 6 degrees-of-freedom.
• Keplerian orbit parameters (Mean Anomaly, Right Ascension, Eccentricity, etc.)
• Geodetic (Latitude, Longitude, Altitude, Speed, Attitude)
• State Vector (XYZ position, Speed, Attitude)
The Geodetic and State Vector options may be operated simultaneously, with automatic translation
from one co-ordinate frame to the other while editing. However, data is not translated when moving to
and from the Keplerian option. The supported reference frames are J1950 and J2000.
The initial orbital trajectory specified will be subject to the supplied gravity models plus user
configurable effects such as atmospheric drag. Both the GEM10 and the more recent JGM3 gravity
models are available. Each can be calculated to an order of 2 through 30 terms depending on the
precision required.
Figure 16 Spacecraft position editor
spirent.com | 23
Manoeuvres are supported to perturb the orbit simulating thrusts and rotations as described below.
ROTATE
Rotate the vehicle about the specified vehicle axis (X, Y or Z) at the
time specified through the angle specified. The direction, duration and
dynamics of the rotation are user specified. Multiple time-coincident
rotations about different vehicle axes allow complex rotations to be
performed.
ACCELERATE with
respect to BODY AXES
Apply a thrust along the specified body axis (X, Y or Z). The direction,
duration and dynamics of the acceleration are user specified. Multiple
time-coincident accelerations along different vehicle axes allow
complex accelerations to be performed.
ACCELERATE with
respect to INERTIAL
AXES
Apply a thrust along the specified Earth-Centred Inertial axis (X, Y or
Z). The direction, duration and dynamics of the acceleration are user
specified. Multiple time-coincident accelerations along different inertial
axes allow complex accelerations to be performed.
User trajectory
The user may choose to supply a trajectory independent of the models supplied. The user defines the
trajectory in an ASCII form supported by many commercial packages that support comma-separated
file output, such as spreadsheets. The format of each data record is the same as that used for
external trajectory data
• The data is read and used in real time.
• Lever-arm effects due to antenna positioning are handled automatically.
SimGEN
®
can also use trajectory information from NMEA data and from Google® Maps using
Spirent’s SImROUTE™ trajectory generation tool
External trajectory - hardware-in-the-loop (HIL)
User trajectories may be supplied in real-time as standard via Ethernet using TCP/IP Sockets.
This feature, known as SimREMOTE™ (see reference [4] in Related Spirent product specifications
section, page 40) is an extremely powerful capability allowing full Hardware-in-the-loop capability for
simulation of feedback control systems or for integration with vehicle motion simulators.
• True system latency in closed-loop can be as low as 6ms and an effective
system latency of 0ms can be easily obtained for all trajectories where there is no
step change in jerk.
• Time stamped data can be supplied asynchronously at any rate, including
variable rate, up to 1000Hz (on the GSS9000 platform). Missing data records are
handled gracefully.
• Lever-arm effects due to antenna positioning are handled automatically.
• The same syntax is supported via IEEE-488 bus and SCRAMNetGT interfaces,
for which Spirent can optionally supply a suitable expansion card for the system
PC plus a PCI synchronisation timer card if required. Details of the command
syntax are available upon request.
SimREMOTE™ also supports a large range of remote control functions, such as selection of scenario,
variation of power level and variation of code and carrier phase of the satellite signals.
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
24 | spirent.com
Terrain obscuration
A comprehensive Terrain Obscuration model is included for terrestrial vehicles, which simulates the
temporary and intermittent masking of the GPS Satellite signals when manoeuvring at low altitude in
mountainous terrain. Whilst this does not represent an actual region of the earth, the effects perceived
by the receiver-under-test are typical of those experienced in a terrain of the specified type.
The input to the model is the vehicle height above the WGS-84 ellipsoid and the arrival elevation
vector of the satellite signal.
The terrain is user configurable in terms of the proximity of the terrain, its maximum and minimum
height above the ellipsoid, and its maximum and minimum width. Terrain height and width are varied
pseudo-randomly, and the pattern of interruption is accurately repeated on consecutive simulation
runs with the timing of changes proportional to the vehicle speed.
Figure 17 Terrain obscuration editor
The terrain type can be modified during the simulation, with horizontal distance travelled governing the
point at which the terrain is deemed to have changed.
Executing the same vehicle trajectory at a different vehicle speed increases or decreases the
interruption rate appropriately.
Antenna modelling
SimGEN
®
supports modelling of both the satellite transmit antenna patterns and the reception pattern
of the navigation sensor’s antenna in terms of amplitude and phase with selectable resolution up to 1
o
in both azimuth and elevation (5
o
minimum resolution for ≥100Hz operation).
The gain pattern may represent the composite effects of the free-space reception pattern and the on-
vehicle obscuration of the vehicle body.
The patterns are fully linked to the vehicle trajectory, allowing automatic simulation of masking of
satellite signal due to vehicle obscuration during manoeuvres. This feature is also fully supported
spirent.com | 25
during operation in the Hardware-in-the-loop mode of operation (see External trajectory - hardware-in-
the-loop on page 23).
Figure 18 Antenna pattern editor
Additional antenna pattern flexibility is provided by the facility to download a pattern to the SimGEN
®
controller in the popular comma-separated ASCII format.
Antenna lever arm offsets with respect to the centre-of-motion reference may be fully specified, along
with antenna angular orientation with respect to the body frame. Additional dynamics associated with
the lever arm as a result of rotations of the body axes during manoeuvres are fully applied to the RF
signals.
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
26 | spirent.com
Figure 19 Antenna lever arm
Multipath modelling
Extensive Multipath modelling is supported within SimGEN
®
allowing the user to test in an
environment that is subject to reception of reflected signals.
There are two principal approaches to multipath modelling. 1) Discrete/analytical, where specific
signal parameters are manipulated in a controlled and analytical way and, 2) Via 3-dimensional
environment and signal modelling where the multipath and obscuration is simulated based on a
synthetic 3D model, from which real-life locations can be regenerated and used in simulation to
recreate the multipath signature of that location. This capability requires Spirent’s Sim3D™ software
product. Please see reference [9] in Related Spirent product specifications section, page 40)
Figure 20 Sim3D™ environment representation
In most cases, Multipath reflections (echoes) are simulated using a signal generator channel. Note
that an embedded 4-tap delay-line is additionally supported on GSS9000, GSS8000 and GSS7800
platforms.
At least five main discrete models are supplied:
spirent.com | 27
• Fixed offset
where the reflected signal is subjected to a fixed loss and delay, both of which are user-
defined.
• Ground Reflection
where the reflected signal suffers a specified, fixed ground loss plus a delay based upon
simulated vehicle height above the ellipsoid. The elevation angle of incidence of the
original line-of-sight signal is inverted for the purposes of antenna reception-pattern effect
simulation.
• Vertical Plane
where the user specifies an array of vertical planes that is logically distributed to the right
and left of the simulated vehicle. The height, width and distance of theses vertical planes is
specified by the user and those to the right are independent to those on the left. The
impact of these vertical planes in terms of obscuration and/or their ability to create an echo
is assessed and if appropriate the signals are either obscured or a ray-traced echo created
with the appropriate delay and loss.
• Reflection Pattern
where the delay and loss of a specified echo is determined from a look-up table driven by
the azimuth and elevation of the signal incident at the simulated antenna site.
• Statistical
where channels are assigned to signals based on a category mask, driven by arrival angle
of the line-of-sight signal, and where the characteristic of the signal impairment is driven by
elevation angle and specified environment, such as Urban Canyon, Rural, etc. See Figure
21.
Figure 21 Statistical multipath category mask editor
Changes to code and carrier phase and power level can also be applied by direct command over the
SimREMOTE™ interface.
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
28 | spirent.com
Multi-copy constellations (licenced feature for GSS9000 only)
SimGEN
®
supports generation of multiple copies (up to 10) of an entire constellation, each with a full
constellation editor. This allows sophisticated spoofing testing scenarios to be created by manipulating
the parameters of the constellation copies. Multi-constellation applies to satellites (orbital) as well as
Pseudolites (Ground-based, interference/jamming signal sources)
Position modes can be set as appropriate:
• Orbital
• Ground Tx absolute
• Ground Tx vehicle relative
2-vehicle to 1RF (licenced feature for GSS9000 only)
SimGEN
®
supports the simulation of 2 independent vehicles (and their respective trajectories) under
one antenna. This feature allows trajectory spoofing and meaconing to be carried out. For the purpose
of a spoofing (meaconing) attack, a two-vehicle scenario can be created, static and dynamic, each
vehicle will be originally co-located and will be assigned a separate constellation, the dynamic vehicle
could then be defined to move away from the original position.
Ground-based interference (GTx) (licenced feature for GSS9000 only)
SimGEN
®
supports the simulation of multiple interference sources which can be modelled in physical
locations in the scenario. Interference sources are assigned to the GNSS antennas. They can be
static or have motion, and the signal power can be fixed or modelled relative to the distance from the
GNSS antenna. A variety of interference signal types can be generated.
Figure 22 Power vs distance modelling for GTx
Data access
Graphical and textual data may be displayed whilst the scenario is being run in real-time, a process
known as QUICK-LOOK. All scenario data generated by SimGEN
®
can be optionally stored for off-line
processing using commercially available packages, such as spreadsheets, that offer graphing
capabilities. Data stored includes (but is not limited to) all vehicle position and attitude data,
pseudorange data, signal amplitudes, error values, and transmitted data messages.
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Quick look
Quick look provides access to categorised data for display in either tabular or graphical format.
Multiple Graphical plot windows are supported. The operator selects parameters from the categorised
lists:
• Time – Run time, UTC, GPST, GPS-UTC offset, Z count, etc.
• Vehicle - Centre-of-Gravity Position (XYZ or LLH), Velocity (XYZ or END), Attitude (body
axes, Heading, Roll, Pitch) and rate, vehicle speed, etc.
• Antenna - Similar to Vehicle, but relevant to the antenna location
• Satellite - Position (XYZ or LLH), Velocity, Identity, etc.
• Signal - Range, Pseudorange and PR-rate, Arrival angle, Ionospheric Delay, Tropospheric
delay, Power Level, Identity, etc.
• External - Data captured from an external source, such as a receiver. See Data capture on
page 31.
After compiling a list of parameters for tabular data or a set of graphical plots, the operator may save
the list and/or set to file for use in subsequent scenarios, removing the need to re-specify a favourite
set of quick look data.
Figure 23 Quick Look Selection and Logging
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
30 | spirent.com
Data storage
While scenarios are being run, the operator may choose to log generated data to a file. SimGEN
®
supports data generation at variable sample rates up to a maximum of 1000Hz (signal generator
hardware dependent).
Multiple files may be created to contain different data sets at different rates, if required. The data set
chosen may be saved for use as standard templates for other scenarios, removing the need to re-
create the format for multiple simulations. A bulk logging option is also provided to capture all vehicle
and signal data.
The file format is selectable by the user to be either Comma Separated ASCII, a format supported by
many spreadsheets and mathematical-analysis software packages, or binary data.
Data streaming
Simulation truth data can also be streamed in real-time at rates up to 1000Hz.
Data includes vehicle motion parameters and satellite parameters.
spirent.com | 31
Figure 24 Data streaming
Data can be directed to an Ethernet port using UDP protocol or can be directed to another application
running on the SimGEN
®
PC/host via an operating-system socket connection.
Data capture
SimGEN
®
supports capture of data from an external source, typically a receiver navigating from
signals generated by the simulation system.
Two standard capture tools are included; NMEA and Generic.
NMEA data capture
Many receivers include a data port that outputs navigation and other performance data via a series of
messages in the NMEA-0183 standard. This is usually transmitted over a serial bus such as RS-232C.
The user simply connects the receiver's data port to an RS-232C port on the computer system using a
suitable cable. Utilities are included to set the Baud rate and protocol to match that of the receiver.
The user then selects the message types to be captured and interpreted and SimGEN
®
is able to
extract the embedded data and associate it into keywords that may be used in real-time by the
QUICK-LOOK facility The data can also be stored to disk for off line processing.
SimGEN
®
is compatible with a range of Spirent signal generator platforms that are capable of
supporting a variety of signal structures (Table 1).
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
32 | spirent.com
GNSS signal constellation types
SimGEN
®
offers the user choices for selecting the GNSS constellations to be simulated that are
consistent with installed hardware, licenced constellations, options and hardware types.
Depending on the configuration of the simulator, the simulated signal types may be selected as shown
in the example in Figure 25
For a detailed definition of the signals simulated for each constellation, please refer to the Product
Specifications for the GSS7000 and GSS9000 respectively (see references [1] and [8] in Related
Spirent product specifications section, page 40)
For details regarding the functionality and control of the licenced GNSS signals, see the SimGEN
®
User Manual in Reference
Figure 25 Signal type selection
spirent.com | 33
Hardware supported
Table 1 lists the current generation of RF signal generators supported by SimGEN
®
along with the
appropriate hardware specification datasheet reference.
Table 1 Current generator platforms supported by SimGEN
®
Product ID Description
Reference
(in Related Spirent
product specifications)
GSS9000
Multi-GNSS, Multi-Frequency RF
Constellation Simulator – all GNSS
navigation signals
[1]
GSS7000
Multi-GNSS, Multi-Frequency RF
Constellation Simulator – all GNSS non-
classified navigation signals
[8][1]
GSS7765 RF Interference Simulation System [5]
SimGEN
®
Support for Previous Generator Platforms
Table 2 lists previous generations of RF signal generators that are supported by SimGEN
®
.
Table 2 Previous Generator Platforms supported by SimGEN
®
Product ID Description
GSS6560 GPS 12 channel L1 C/A simulator
GSS7700
GPS Multi-Channel
GPS – all
SBAS – L1/L5
GSS6700
Multi-GNSS RF Constellation Simulator
GPS L1C/A, Galileo E1B/C,
GLONASS L1, BeiDou-2 B1I
GSS8000
Multi-GNSS, multi-frequency RF Constellation
Simulator
GPS – all navigation signals
Galileo – all navigation signals
GLONASS – C/A and P code
BeiDou – B1I and B2I
QZSS – L1 C/A+SAIF
SBAS – L1/L5
GSS7800
Galileo Multi-Channel
Galileo – E1/E6/E5ab
GSS7790
Multi-RF Output (one-per-satellite)
GPS L1/L2
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®
Software Suite for Spirent GNSS Constellation
Simulation Systems
34 | spirent.com
GSS7900
GPS/Galileo Multi-Channel
GPS L1+ Galileo E1/E5ab
STR4760
GPS Multi-Channel
GPS – L1/L2 Legacy
SBAS – L1
GSS4750
GPS Multi-Channel
GPS – L5
STR4780
GLONASS Multi-Channel
L1 C/A
GSS4765 RF Interference Generators
GSS4150 LAAS/VDB VHF Signal Generator
SimGEN® also allows you to save test scenarios for replay via Spirent’s other simulation control
software variants; SimREPLAYplus™ and SimTEST™ . Licensing conditions apply to some features.
spirent.com | 35
Optional and extended capabilities support
Spirent offers a range of product extensions that are compatible with SimGEN
®
and enhance the
simulation system performance beyond standard GNSS simulation.
Commercial extensions
Interference simulation
SimGEN
®
supports the integration of Interference simulation via its general-purpose GSS7765 product
(see reference [5] in Related Spirent product specifications section, page 40).
Interference and its impact on GNSS receiver performance is a key test criteria for many applications,
both commercial and Military.
The GSS7765 provides the ability through SimGEN
®
to position interferers in the scenario with user
defined characteristics or to simply set up pre-defined Interferer situations.
The GSS7765 comprises hardware signal generators and a signal combiner system plus the
SimGEN
®
extensions.
Spoofing simulation
SimGEN
®
supports the spoofing of GNSS receivers by several methods, including inherent features
already described such as Multiple-copy Constellations, 2-vehicle 1-RF and the general signal and
data manipulation features available by default. Spoofing is also supported via Spirent’s SimSAFE™
Spoofing Simulation Software. Please refer to the SimSAFE™ Product Specification reference [11] on
page 40
Automotive extensions
SimGEN
®
supports simulation of automotive dead reckoning sensors via its SimAUTO extensions
(see reference [7] in Related Spirent product specifications section, page 40).
SimAUTO™ uses plug-in hardware and equips SimGEN
®
with extensions that configure and provide:
• Pulses representing wheel speed sensor outputs
• Heading or rate gyro voltages
• Forward/Reverse sensor output
• CAN bus data
Models are included to degrade the accuracy of sensor outputs, including events such as wheel
skid/slip and gyro bias and drift.
The ability to drive a single axis rate is also supported.
Ground based augmentation systems
SimGEN
®
supports simulation of ground based augmentation systems (GBAS), (see reference [4] in
External documents section, page 39).
Spirent’s GSS4150 is required to generate the VHF VDB signals for this capability via the appropriate
software extensions to SimGEN
®
.
The user may define a reference receiver location at which the enhanced SimGEN
®
determines the
errors that would be introduced by models applied to simulated GPS satellite signals at that location.
These include Ionosphere, Satellite Clock terms, Clock Noise (simulated Selective Availability) and
Ephemeris errors. These errors are compiled into differential correction data for subsequent
transmission to an airborne receiver under test using the message types defined for the system. Apart
from the differential corrections, fixed data related to the airport and the landing system setup is also
included in these data messages. The SimGEN
®
add-in provides forms to allow the operator to simply
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
36 | spirent.com
enter this static data as part of the simulation definition. It is also possible to define transmitted data
errors.
Message types 1, 2 and 4 are supported. The user may define the rates at which the messages are
transmitted and define system latency for message generation.
Figure 26 GBAS message type 1 and 2 editor examples
The enhanced SimGEN
®
supports two methods for delivery of the messages:
• Via RS232 port on the SimGEN
®
PC/host
Via the VHF link provided by the Spirent GSS4150 VHF Data Broadcast Simulator hardware
spirent.com | 37
Authorised testing extensions
A number of SimGEN
®
extensions are available to authorised customers. Many of these features are
subject to export approvals
In general, access to these features is via the supply of additional DLLs and/or licencing compatible
with SimGEN
®
and some form of hardware upgrade.
Inertial simulation extensions
SimGEN
®
supports simulation of Inertial sensor outputs (from accelerometers and gyroscopes) via
Spirent’s SimINERTIAL™ package (see reference [8] in
Related military/government product specifications, page 40) which provides for testing support for a
broad range of specific EGIs and IMUs, plus the generic NATO Standard STANAG 4572.
These upgrade products enable SimGEN’s data streaming capability to provide the raw data needed
to compute the sensor outputs on an additional computer equipped with application software and
specific interface cards.
SA/A-S extensions
SimGEN
®
supports the SimCLASS™ extension (SimSAAS in the USA, developed and supplied by
Spirent Federal Systems, Inc) (see references [3], [4] and [5] in section, page 40 ) that provides the
ability to generate the Military Y-code (Anti-Spoof or A-S), on compatible hardware systems and to
simulate Selective Availability (SA).
Encryption devices are required.
SimCLASS™ is available to authorised users only and is subject to Export Approvals.
GPS M-Code extensions
SimGEN
®
supports the SimMCODE™ extension (see reference [1] in
Related military/government product specifications, page 40) that provides the ability to generate the
AES-M-Code signal on compatible GPS L1/L2 platforms.
A Hardware upgrade is required.
SimMCODE™ is unclassified but its availability is controlled by Export Licence.
An extension to SimMCODE™ providing MNSA M-Code via SimMNSA™ capability is also available
for authorised US customers only. Please contact Spirent Federal Systems in the USA directly for
more information.
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
38 | spirent.com
Galileo FOC extensions
SimGEN
®
supports the encrypted SimCS™ extension for GSS9000 (see reference [6] in
Related military/government product specifications, page 40) that provides the ability to generate
encrypted signals for Galileo Commercial Service and Safety of Life services which are part of Galileo
Full Operational Capability (FOC)
A Hardware upgrade is required.
Galileo PRS extensions
SimGEN
®
supports the LZE GmbH PRS[WARE] extension (see reference [7] in
Related military/government product specifications, page 40) that provides the ability to generate the
PRS signal for Galileo on appropriate L1/E6 platforms.
A Hardware upgrade is required.
PRS[WARE] is classified EU CONFIDENTIAL and both PRS[WARE] and SimCS™ availability is
subject to export controls and only available to customers individually authorised by the Galileo
System Authority
If you require any capability which is for authorised users, we recommend you contact Spirent for
specific information and advice.
Warranty and support
Spirent’s simulation systems and signal generators are supplied from new with a 12 month hardware
and software warranty.
In order to remain protected after the expiry of the warranty, Spirent recommends that all customers
purchase Spirent Support Services, as described in this specification.
The Spirent Support Service is designed to make it easy to keep the GNSS test system up to date
with the latest software releases, maximising the benefit derived from using a Spirent GNSS test
system.
Spirent Support Service Plans
Spirent provides the following levels of support
• Repair Only – Technical Assistance, Hardware repair
• Software Only – Technical Assistance, Software updates
• Standard – Technical Assistance, Software updates, Hardware repair
• Standard Plus – Deleted, as never used
• Premium – Factory Calibration Service in addition to Standard Support
• Premium Plus - Onsite Calibration Service in addition to Standard Support
For more information, please contact your Spirent representative
spirent.com | 39
Referenced documents
The following documents are referenced in this publication:
External documents
Reference Document No. Title Issue
[1]
IS-GPS-200H Navstar GPS Navigation User Interfaces H
[2]
IS-GPS-705D Navstar GPS User Segment L5 Interfaces D
[3]
RTCA-DO229D WAAS MOPS D
[4]
RTCA-DO246D GBAS (LAAS) Signal in Space ICD Partial D
[5]
GLONASS SISICD GLONASS Interface Control Document (GICD) V5.1(2)
[6]
NASA ref 88 FM1/JSC - 32064 Refraction Corrections for Orbiting Vehicles
[7]
GAL-ICD-ESA-SYST-X-0027 Galileo Signal-In-Space ICD 1-20
[8]
IS-QZSS-PNT-001 Interface Specification 001
[9]
IS-QZSS-L6-001
QZSS Interface Specification Centimetre Level
Augmentation Service
Draft Edition, 001
[10]
Galileo OS SIS ICD Galileo Open Service Signal-In-Space ICD Issue 1.10
[11]
BeiDou OS SIS ICD
Beidou Navigation Satellite System Signal-In-
Space ICD Open Service
Version 2.1
[12]
BeiDou OS SIS ICD
Beidou Navigation Satellite System Signal-In-
Space ICD Open Service B1C and B2A
V1.0
[13]
BeiDou OS SIS ICD
Beidou Navigation Satellite System Signal-In-
Space ICD Open Service B3I
V1.0
[14]
NavIC SIS ICD
ISRO-IRNSS-ICD-SPS
V1.1
[15]
NMEA NMEA-0183 V4.10
[16]
RINEX Receiver Independent Exchange Format V3.00
Datasheet MS3008 Issue 11-00 July 2019
SimGEN
®
Software Suite for Spirent GNSS Constellation
Simulation Systems
40 | spirent.com
Related Spirent product specifications/documents
Reference Document No. Title
[1]
MS9000
GSS9000 Series GNSS Multi-GNSS, multi-frequency Constellation Simulator
Datasheet Specification
[2]
MS3057
GSS8000 Series GNSS Multi-Channel Constellation Simulator Datasheet
Specification
[3]
MS3058
GSS8700 Advanced GPS Multi-Channel Constellation Simulator Datasheet
Specification
[4]
MS3015 SimREMOTE Remote Control for Spirent GPS Simulators Datasheet Specification
[5]
MS3055 GSS7765 Interference Simulation System Datasheet Specification
[6]
MS3067
GSS6700 GNSS Multi-Channel Simulator with SimGEN
®
Datasheet Specification
[7]
MS3023 SimAUTO Automotive Upgrade Datasheet Specification
[8]
MS7000 GSS7000 Series GNSS Constellation Simulator datasheet with product specification
[9]
MS3105 Sim3D Multipath Simulation Software datasheet with product specification
[10]
DGP00686AAA
SimGEN
®
Software User Manual – latest issue
[11]
MS3092 SimSAFE v3 Datasheet
Related military/government product specifications
Reference Document No. Title
[1]
MS9018 SimMCODE Upgrade for GSS9000 Product Specification
[2]
MS3025 GSS7790 Multi-Output GPS Simulator Product Specification
[3]
MS3020 SimCLASS SA/A-S Upgrade Product Specification (for non-USA only)
[4]
MS9020
SimCLASS SAAS Upgrade for GSS9000 Product Specification (for non-
USA only)
[5]
SF1001 SimSAAS SA/A-S Upgrade (for USA Only)
[6]
MS9041 SimCS Galileo FOC CS and SoL option for GSS9000
[7]
MS9042 SimPRS Galileo Public Regulated Service option for GSS9000
[8]
MS3030 SimINERTIAL Packages Product Specification
spirent.com
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Tel +44 (0)1803 546300 Fax +44 (0)1803 546301
www.spirent.com/positioning
Registered in England Number 00470893
Registered office: Northwood Park, Gatwick Road, Crawley, West Sussex RH10 9XN, UK
© 2019 Spirent. All Rights Reserved.
All of the company names and/or brand names and/or product names referred to in this document, in particular, the name “Spirent” and its logo device, are
either registered trademarks or trademarks of Spirent plc and its subsidiaries, pending registration in accordance with relevant national laws.
All other registered trademarks or trademarks are the property of their respective owners.
The information contained in this document is subject to change without notice and does not represent a commitment on the part of Spirent. The information
in this document
is believed to be accurate and reliable; however, Spirent assumes no responsibility or liability for any errors or inaccuracies that may appear in the document.
