GRAVITY MODELING FOR HIGH-ACCURACY GPS/INS INTEGRATION

Dorota A. Grejner-Brzezinska and Jin Wang

Peer Reviewed

Abstract: The feasibility of improving airborne GPS/INS integrated navigation by use of accurate deflection of the vertical (DOV) information is investigated in this paper. Based on the available 2 x 2 arcmin DOVgrid, tests were run on GPSIINS navigation data, and the results were compared with the corresponding results where the DOV compensation was not used. The issue of stochastic modeling of the anomalous gravity field in the state vector of the integrated filter is also addressed. The tests were conducted using the Airborne Integrated Mapping System (AIMS’“), whose positioning component is based on a tightly integrated GPSIINS. The system is designed to provide orientation and position of an aerial platform, with estimated accuracy of 4-7 cm in position and - 10 arcsec in orientation in postmission moo?e. A brief overview of the system is also given, including a dis- cussion of current error modeling and airborne test results.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 45, Number 3
Pages: 209 - 220
Cite this article: Grejner-Brzezinska, Dorota A., Wang, Jin, "GRAVITY MODELING FOR HIGH-ACCURACY GPS/INS INTEGRATION", NAVIGATION, Journal of The Institute of Navigation, Vol. 45, No. 3, Fall 1998, pp. 209-220.
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