Workshop 2018
Bin Wang - Signal-in-space Accuracy Analysis for BDS in 2016-2017 - October 29, 2018 • 519 Views
Different from the other global navigation satellite system (GNSSs, such as GPS, GLONASS and Galileo), BeiDou-2 uses a unique constellation design, which composed of GEO, IGSO and MEO satellites. With the GEO and IGSO satellites, BeiDou-2 can provide best coverage in the Asia-Pacific region and use a small number of satellites to make the regional navigation performance reach the same level as that of GPS. The monitoring stations of BeiDou-2 operational control system is confined to the Chinese mainland, all the stations are located in northern hemisphere, and different attitude control modes are applied to each type of Beidou-2 satellites. All of them pose the challenges of orbit determination of BeiDou satellites (Zhou et al., 2013). In addition, suffered from a nearly-static viewing geometry, GEO satellites exhibit substantial orbit determination error due to high correlation of orbit and clock parameters. In order to make up the disadvantage of limited satellite-tracking ability of regional monitoring stations, and also get the precise satellite clock offsets, an independent time synchronization system is established. In this system, techniques such as L-band two-way radio time transfer (TWTT) and C-band two-way satellite time and frequency transfer (TWSTFT) are used (Zhou et al., 2011).

View PDF

Please include the IGS logo and citation in all websites, presentations, publications, or posters that use IGS data, products, or services. IGS is a service of IAG.