Accession Number:

ADA238890

Title:

A Navigation Reference System (NRS) Using Global Positioning System (GPS) Aiding

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1991-03-01

Pagination or Media Count:

259.0

Abstract:

To quantify the performance abilities of existing or proposed navigation systems, the U.S. Air Force has for the last several years compared the performance of the system under test to the performance of a baseline navigation system known as the Completely Integrated Reference Instrumentation System CIRIS. CIRIS obtains a highly accurate navigation solution by combining the output from three major subsystems inertial navigation system INS information, barometric altitude information, and range and range-rate data from ground transponders which have been precisely surveyed. Although the navigation solution produced by CIRIS is highly accurate, it will soon be inadequate as the standard against which future navigation systems can be tested. This research proposes an alternative to CIRIS - a hybrid Navigation Reference System NRS which is designed to take advantage of a newer INS the LN-93, certain features of the current CIRIS, and certain features of the Global Positioning System GPS. Analysis is conducted using a Kalman filter development package known as the Multimodel Simulation for Optimal Filter Evaluation MSOFE. Both a large order truth model for the NRS in which a full 24 satellite constellation is modeled and a full-order Kalman filter are developed. Results suggest that the proposed NRS with GPS aiding provides a significantly improved navigation solution as compared to CIRIS.

Subject Categories:

  • Navigation and Guidance

Distribution Statement:

APPROVED FOR PUBLIC RELEASE