Observability analysis of inertial navigation systems during in-flight alignmentIn this work the observability of an Inertial Navigation System (INS) during In-Flight Alignment (IFA) is investigated. A systematic approach to the observability analysis of a piece-wise constant system is presented and its use is justified mathematically. As a tool for the investigation a Stepped Observability Matrix (SOM) is constructed and a corresponding Stepped Space is defined. The INS error model is transformed into the Stepped Space during a specially chosen IFA trajectory and a full observability is carried out. The results of the mathematical analysis are checked against the results of covariance simulation and a full agreement is found between the two. Finally, the practical implications of this analysis are outlined.
Document ID
19880063000
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bar-Itzhack, I. Y. (NASA Goddard Space Flight Center Greenbelt, MD; Technion - Israel Institute of Techology, Haifa, United States)
Goshen-Meskin, D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Report/Patent Number
AIAA PAPER 88-4125
Meeting Information
Meeting: AIAA Guidance, Navigation and Control Conference