NDLI: HMS scott ring laser gyro navigator integration

Content Provider	IEEE Xplore Digital Library
Author	Leblang, M. Dunham, S.J. Pappalardi, F.
Copyright Year	2003
Description	Author affiliation: Space & Naval Warfare Syst. Center, San Diego, CA, USA (Leblang, M.; Dunham, S.J.)
Abstract	HMS SCOTT is a United Kingdom ocean survey vessel, that hosts a state-of-the-art deep ocean mapping system which was designed, developed and is currently maintained and periodically updated by the Space and Naval Warfare Systems Center, San Diego, (SSC-SD). The most recent update of this system, completed in late 2002, consisted of the replacement of an obsolete and very costly to maintain inertial navigation system. Another reason for updating the ship's inertial system was to provide higher accuracy attitude data, than was previously available with the old inertial system, to the high resolution multi-beam sonar system in order to produce improved bathymetric charts. After conducting a market survey of suitable inertial navigator systems, the Kearfott SEANAV Ring Laser Gyro Navigator, (RLGN), system, using a monolithic T-24 gyro, was selected to replace the old inertial system. The selection of the SEANAV RLGN was based on its relatively low cost, high reliability, and particularly the roll and pitch data accuracies of typically less than 1-arc-minute. This attitude data accuracy was key to enable a significant improvement in the bathymetry data accuracy. Two SEANAV systems were integrated with GPS receivers, a system master time code generator, and Electro Magnetic (EM) Log and Doppler Sonar speed sensors to provide the navigation portion of the mapping data. Operational testing of this updated system aboard HMS SCOTT in November, 2002, showed a marked improvement in the quality of the map product due in part to the improved attitude data provided by the SEANAV RLGN system.
Sponsorship	Dept. of the Navy Sci. and Technol. Coalition for Enhanced Marine Resources Orincon Ceros Harbour Offshore Inc
Starting Page	538
Ending Page	543
File Size	386901
Page Count	6
File Format	PDF
ISBN	0933957300
DOI	10.1109/OCEANS.2003.178638
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Ring lasers Sonar navigation Oceans Oceanographic techniques Inertial navigation Costs Global Positioning System Magnetic sensors Sensor systems System testing
Content Type	Text
Resource Type	Article

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