Study on autonomous navigation based on pulsar timing model

Details Study on autonomous navigation based on pulsar timing model Study on autonomous navigation based on pulsar timing model

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009scchg..52..303l&link_type=abstract

Science in China Series G: Physics, Mechanics and Astronomy, Volume 52, Issue 2, pp.303-309

Astronomy and Astrophysics

Astronomy

3

X-Ray Pulsar, Pulsar Timing Model, Autonomous Navigation, Toa Measurement

Scientific paper

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.

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