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Detecting the errors in solar system ephemeris by pulsar timing
Li Liang1; Guo Li1; Wang GuangLi1
2016
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume16Issue:4
AbstractPulsar timing uses planetary ephemerides to convert the measured pulse arrival time at an observatory to the arrival time at the Solar System barycenter (SSB). Since these planetary ephemerides cannot be perfect, a method of detecting the associated errors based on a pulsar timing array is developed. By using observations made by an array of 18 millisecond pulsars from the Parkes Pulsar Timing Array, we estimated the vector uncertainty from the Earth to the SSB of JPL DE421, which reflects the offset of the ephemeris origin with respect to the ideal SSB, in different piecewise intervals of pulsar timing data, and found consistent results. To investigate the stability and reliability of our method, we divided all the pulsars into two groups. Both groups yield largely consistent results, and the uncertainty of the Earth-SSB vector is several hundred meters, which is consistent with the accuracy of JPL DE421. As an improvement in the observational accuracy, pulsar timing will be helpful to improve the solar system ephemeris in the future.
KeywordPACKAGE TEMPO2 MASS astrometry ephemerides pulsars: general
Language英语
Funding Project[National Natural Science Foundation of China] ; [Opening Project of Shanghai Key Laboratory of Space Navigation and Position Techniques]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/58466
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.中国科学院大学
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li Liang,Guo Li,Wang GuangLi. Detecting the errors in solar system ephemeris by pulsar timing[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(4).
APA Li Liang,Guo Li,&Wang GuangLi.(2016).Detecting the errors in solar system ephemeris by pulsar timing.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(4).
MLA Li Liang,et al."Detecting the errors in solar system ephemeris by pulsar timing".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.4(2016).
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