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Abstract
The Comparison Between Postional Reliability of Globally Corrected GPS (C-NAV DGPS) and Terrastial Based One (Aquarius) in the Persian Gulf
Arash Fouladi
Deep Offshore Technology,
Iran
Email: a.fouladi@dot-corp.com
Dr. Vali Arabi
Managing Director
Deep Offshore Technology
The recent evolution of global Wide Area Differential GPS (WADGPS) networks has greatly increased the already high level of interest in GPS technologies by the hydrographic community.This research investigated on the comparison between one of these WADGPS receivers, the C&C Technologies Globally Corrected GPS (GcGPS) C-Nav receiver and terrestrial based one (Aquarius II) in positional reliability for the jacket positioning in the Salman Oil & Gas field located in the Persian Gulf.The C-Nav was mounted aboard the SAF400 Crane Barge along with Aquarius Rover station and simultaneously observations data were collected for 6 days. Then the 1 Hz data were processed and decimated down to 6 minute epochs, thus speeding the filter processing to obtain realtime data latency. The standard deviation of the residuals between the C-Nav and Aquarius was 4.3 cm. This level of precise positioning is commensurate with International Hydrographic Organization (IHO) Special Order surveys.
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