Global Positioning System Satellite Selection Evaluation for Aided Inertial Navigation.
Abstract
The navigation performance of the geometric dilution of precision (GDOP) GPS satellite criterion versus an alternate GPS satellite selection criterion for an integrated GPS/INS Navigator in a jamming environment is tested and analyzed. The theoretical development of GDOP and GDOP-based satellite selection criterion are reviewed. From this review a satellite selection criterion known as the cost criterion (which is a combination of noise-weighted GDOP and the a priori covariance weighted least squares position error) is selected for performance testing against a GDOP satellite selection criterion. Performance assessment of the two satellite selection criterion is accomplished using a modified version of the integrated GPS/INS (IGI) Computer Simulation. The IGI Simulator is modified to simulate adaptive band-width control of the satellite tracking loops, the use of a mull steering antenna, the use of an alternate satellite selection criterion, and the effects due to jammers. The performance assessment is based on simulating a single F-4 Close-Air-Support Mission encountering five different jamming scenarios.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1983
- Accession Number
- ADA138070
Entities
People
- P. M. Vaccaro
Organizations
- Air Force Institute of Technology