Date of Award

3-1991

Document Type

Thesis

Degree Name

Master of Science in Electrical Engineering

Department

Department of Electrical and Computer Engineering

First Advisor

Randall Paschall, Captain, USAF

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.

AFIT Designator

AFIT-GE-ENG-91M-04

DTIC Accession Number

ADA238890

Comments

The author's Vita page is omitted

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