Performance Analysis of the lnterrupted Data Acquisition Receiver Obtained From Operational Missions

Gerald Whitworth and David Meldrum

Abstract:	Navstar Systems Ltd is closely involved with Dunstaffnage Marine Laboratory (DML) to design and develop a GPS navigation system for an Autonomous Underwater Vehicle (AUV), called Autosub, currently under development. The GPS receiver is required to generate a position solution while the AUV is surfaced, under a range of sea states that interrupt the GPS signal due to vessel roll and periodic wave washover of the GPS antenna. This paper is the third in a series detailing the development process. The first paper described the physical requirements of the receiver, including the antenna system, and the simulation of wave washover effects, and the modelling of ephemeris collection algorithms. The second paper described in detail the various techniques that were developed in the receivers firmware to overcome the problems of frequent intermittent loss of the GPS signal, including initial acquisition and ephemeris collection by reconstituting the small contiguous samples of data collected.
Published in:	Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA
Pages:	935 - 940
Cite this article:	Whitworth, Gerald, Meldrum, David, "Performance Analysis of the lnterrupted Data Acquisition Receiver Obtained From Operational Missions," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 935-940.
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