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6 FAQs about [Beidou satellite solar power generation]
Which SRP model is used for BeiDou satellites?
Generally, four classes of SRP models have been applied to BeiDou satellites. In SRP models of the first type, the traditional Empirical CODE Orbit Model (ECOM) of the Center for Orbit Determination in Europe (CODE) is used, with no a priori model and no additional constraints 6, 7, 8, 9.
How many satellites does Chinese BeiDou have?
Scientific Reports 4, Article number: 4692 (2014) Cite this article Chinese BeiDou Navigation Satellite System is officially operational as a regional constellation with five Geostationary Earth Orbit (GEO) satellites, five Inclined Geosynchronous Satellite Orbit (IGSO) satellites and four Medium Earth Orbit (MEO) satellites.
What is the difference between BeiDou-2 and BeiDou-3 satellites?
Compared with the regional BeiDou satellite navigation system (BeiDou-2), BeiDou-3 satellites are equipped with inter-satellite links (ISLs) payloads and adds three new services signals, namely B1C at 1575.42 MHz, B2a at 1176.45 MHz and B2b at 1207.14 MHz [2, 3].
How is Beidou orbit determined?
In Ge et al. 3, independent BeiDou orbit determination was carried out using three day arcs and nine solar radiation pressure (SRP) parameters of the ECOM model 4. The 3D overlap of GEO and IGSO reaches 3.3 m and 0.5 m in RMS, respectively and an almost constant disagreement in the along-track direction for GEO is found.
How accurate is Beidou orbit?
A number of studies have been carried out on precise orbit determination of BeiDou constellation. Montenbruck et al. 2 presented initial assessment of the BeiDou regional navigation satellite system and the 3D orbit overlap accuracy was 1–10 m.
Does SRP improve ECOM for precise orbit determination for BeiDou satellites?
To further investigate the performance of the SRP model developed in this study in enhancing ECOM for precise orbit determination for BeiDou satellites, the estimated empirical ECOM SRP D0 parameters in the ECOM-only and ECOM + APR solutions are presented in Figures S5 and S6.