20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

Pulsar navigation using Doppler Effect

20 May 2015, 14:00
3h 30m
Board: AST-03
Poster presentation Astronomy, Astrophysics, and Cosmology Poster-1

Speaker

Jompoj Wongphecauxson (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)

Description

Autonomous technology in space navigation is a key to explore the solar system and beyond. Current space navigation technology requires constant communication between spacecraft and ground-based stations with typical error about 4 kilometres per astronomical unit. Pulsars are fast rotating neutron stars. Having high precision (in order of microsecond) in their spin period (approximately second to millisecond), they can be perfect tools for space navigation. As the observed pulsar's spin period changes with the relative motion between the spacecraft and the pulsar (i.e. Doppler Effect), we can determine the spacecraft's velocity in pulsar's direction. Using of three or more pulsars, complete velocity information can be determined. Proof-of-concept simulations with three fake pulsars have been done with C programming, which is shown to be consistent. The results indicate that the error strongly depends on the position of the three pulsars. For example, the maximum error occurs when the three pulsar are in the same position.

Primary author

Jompoj Wongphecauxson (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)

Co-authors

Dr Phrudth Jaroenjittichai (National Astronomical Research Institute of Thailand, Chiang Mai 50200, Thailand) Siramas Komonjinda (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)

Presentation Materials

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