SPAN TECHNOLOGY
SPAN (Synchronous Position, Attitude and Navigation) technology brings together two
dierent but complementary technologies: Global Navigation Satellite System (GNSS)
positioning and inertial navigation. The absolute accuracy of GNSS positioning and the
stability of Inertial Measurement Unit (IMU) gyro and accelerometer measurements,
combine to provide an exceptional 3D navigation solution delivering full attitude and
orientation.
SPAN HEAVE OVERVIEW
The rise and fall movement of a vessel correlates directly to the returning sonar data
in marine mapping applications, leading to errors in depth measurement. To compensate
for these errors, select SPAN receivers feature the robust heave output option.
The images below show the ocean floor mapped with and without heave compensation. With wave
motion eliminated from the data, a much more accurate and coherent image is generated.
TWO SPAN HEAVE SOLUTIONS AVAILABLE
NovAtel® oers real-time and post-processing options for marine application
developers.
Real-Time Measurements: SPAN receivers provide accurate, instantaneous and
delayed measurements of wave motion under the most dicult marine conditions and
vessel dynamics. They oer a full six degrees-of-freedom position and orientation,
measuring position, velocity and attitude. The heave filter provides an asynchronous
log available at 10 Hz, a synchronous log available up to the IMU data rate and a
delayed log up to 10 Hz.
Post-Processed Solution: Inertial Explorer® soware from NovAtel’s Waypoint®
Product Group, post-processes data forward and backward, ensuring the most
accurate heave solution.
Firmware SPAN
®
Heave Filter
IMPROVE DEPTH MEASUREMENT
BY ELIMINATING EFFECT OF WAVE
MOTION IN MARINE APPLICATIONS
+
Provides instantaneous and
delayed heave measurements to
compensate for wave eects
+
Configurable heave filter window
+
Inertial Explorer processing oers
a post-processed heave filter
solution
+
SPAN INS functionality
If you require more information about
firmware, visit www.gnss.ca
BENEFITS AND FEATURES
Photo courtesy Cheetah Marine
SPAN
®
Heave Filter
SPAN HEAVE COMPATIBLE RECEIVERS
1
» FlexPak6™
3
» OEM615™
3
» OEM628™
3
» OEM638™
3
» ProPak6™
2
» SPAN-CPT™
3
» SPAN-IGM-S1™
3
SPAN HEAVE COMPATIBLE IMUS
» IMU-CPT™
» IMU-FSAS
» IMU-IGM-S1™
» IMU-ISA-10 0C
» OEM-HG1900
» OEM-HG1930
» OEM-IMU-STIM300
» UIMU-HG
» UIMU-LN200
HEAVE FILTER ALGORITHM
Instantaneous Measurements
SPAN heave 5 cm or 5%
Delayed
3.5 cm or 3.5%
Post-Processed Solution
Waypoint Inertial Explorer heave 2.5 cm or 2.5%
HEAVE FILTER ALGORITHM
The SPAN heave algorithm estimates the short term, vertical displacement of a vessel, relative
to the mean sea state caused by waves or swells. This allows a sonar system to compensate
for the range errors caused by these effects.
To obtain the latest data regarding this
product, visit www.gnss.ca
gnss.ca
sales@gnss.ca
1-855-OEM-GNSS (U.S. and Canada)
or 778-430-5999
China 0086-21-68882300
Europe 1-855-636-4677
SE Asia and Australia 1-855-636-46771
Version 5 Specifications subject to change without notice.
©2015 NovAtel Inc. All rights reserved.
NovAtel, SPAN, ALIGN, Inertial Explorer and Waypoint are registered
trademarks of NovAtel Inc.
SPAN-CPT, SPAN-IGM-A1, SPAN-IGM-S1, IMU-CPT,
IMU-IGM-A1, IMU-IGM-S1, IMU-ISA-100C, OEM615, OEM628,
OEM638, ProPak6 and FlexPak6 are trademarks of NovAtel Inc.
D16871 November 2015
Printed in Canada.
1. Consult the product specific technical specifications located at:
www.gnss.ca
products/
2. Requires dual antenna ALIGN capable hardware.
3. Requires a second NovAtel receiver to be paired with the SPAN receiver
as an ALIGN rover.