Study on autonomous navigation based on pulsar timing model

• 来源期刊: 中国科学G辑（英文版）
• 年，卷（期）: 2009,（2）
• 页码范围: 303-309
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s11433-009-0015-3

摘要

The basic principle of pulsar timing model was introduced, and the general relativistic corrections were analyzed when pulse time of arrival (TOA) was transferred to coordinate TOA at the Solar System Barycentre. Based on the shifting, an iterative method of autonomous position determination for spacecraft was developed. Accordingly, the linear form of the position offset equation was evolved. Using the initial estimated value of spacecraft's position as the input of pulsar timing equation, through calculation of the offset between measured or transferred and predicted TOA, the position offset can be solved by Least Squares. At last, the main error sources including modeling error and parameters error were discussed.