Related Experiment Video
Updated: Mar 6, 2026

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
Published on: June 25, 2021
Local Observability Analysis of Star Sensor Installation Errors in a SINS/CNS Integration System for Near-Earth
Yanqiang Yang1, Chunxi Zhang2, Jiazhen Lu3
1The Science and Technology on Inertial Laboratory, School of Instrumentation Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China. yangyq@buaa.edu.cn.
Abstract:
Strapdown inertial navigation system/celestial navigation system (SINS/CNS) integrated navigation is a fully autonomous and high precision method, which has been widely used to improve the hitting accuracy and quick reaction capability of near-Earth flight vehicles. The installation errors between SINS and star sensors have been one of the main factors that restrict the actual accuracy of SINS/CNS. In this paper, an integration algorithm based on the star vector observations is derived considering the star sensor installation error. Then, the star sensor installation error is accurately estimated based on Kalman Filtering (KF). Meanwhile, a local observability analysis is performed on the rank of observability matrix obtained via linearization observation equation, and the observable conditions are presented and validated. The number of star vectors should be greater than or equal to 2, and the times of posture adjustment also should be greater than or equal to 2. Simulations indicate that the star sensor installation error could be readily observable based on the maneuvering condition; moreover, the attitude errors of SINS are less than 7 arc-seconds. This analysis method and conclusion are useful in the ballistic trajectory design of near-Earth flight vehicles.
More Related Videos
Related Concept Videos
Errors in Global Positioning System
Types of Global Positioning System Surveys
Introduction to Global Positioning System
Field Application of Global Positioning System
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
Common Leveling Mistakes and Errors

