Gravity Modeling for High-Accuracy GPS/INS Integration

Publisher Website
Google Scholar
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 times 2 arcmin DOV grid, tests were run on GPS/INS 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 GPS/INS. 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 mode. A brief overview of the system is also given, including a discussion of current error modeling and airborne test results.

This publication has 12 references indexed in Scilit: