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The antenna phase center motion effect in high-accuracy spacecraft tracking experimentsстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Litvinov D.A., Filetkin A.I., Bartel N., Gurvits L.I., Nunes G.N., Rudenko V.N., Zakhvatkin M.V.
- Журнал: Advances in Space Research
- Том: 69
- Номер: 6
- Год издания: 2021
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Номер статьи: 10.1016/j.asr.2021.07.036
- DOI: 10.1016/j.asr.2021.07.036
- Аннотация: We present an improved model for the antenna phase center motion effect for high-gain mechanically steerable ground-based and spacecraft-mounted antennas that takes into account non-perfect antenna pointing. Using tracking data o fthe RadioAstron spacecraft we show that our model can result in the correction of the computed value of the effect of up to 2 10-14in terms of the fractional frequency shift, which is significant for high-accuracy spacecraft tracking experiments. The total fractional frequency shift due to the phase center motion effect can exceed 1 10-11 both for the ground and space antenna depending on the spacecraft orbit and antenna parameters. We also analyze the error in the computed value of the effect and find that it can be as large as 4 10-14 due to uncertainties in the spacecraft antenna axis position, ground antenna axis offset and misalignment, and others. Finally, we present a way to reduce both the ground and space antenna phase center motion effects by several orders of magnitude, e.g. for RadioAstron to below 1 10-16, by tracking the spacecraft simultaneously in the one-way downlink and two-way phase-locked loop modes, i.e. using the Gravity Probe A con_guration of the communications links
- Добавил в систему: Руденко Валентин Николаевич