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BeiDou Ground Segment
| BEIDOU | |
|---|---|
| Title | BeiDou Ground Segment |
| Edited by | GMV |
| Level | Basic |
| Year of Publication | 2011 |
The BeiDou Navigation Satellite System (BDS), also known as BeiDou-2[1], is China’s second-generation satellite navigation system[1][2] that will be capable of providing positioning, navigation, and timing services to users on a continuous worldwide basis[3].
BeiDou Ground Segment
The BeiDou Ground Segment consists of:[1]
- a Master Control Station: responsible for satellite constellation control and processing the measurements received by the Monitor Stations to generate the navigation message.
- Upload Stations: responsible for uploading the orbital corrections and the navigation message to BeiDou satellites;
- Monitor Stations, which collect BeiDou data for all the satellites in view from their locations.
Currently, the Ground Segment includes one Master Control Station, two Upload Stations and 30 Monitor Stations[4].
It should be noted that BeiDou-1 is based on GEO communication satellites for the Radio Determination Satellite System (RDSS) service. User position is obtained through the following steps:
- the station sends a signal to a set of users through one of the GEO satellites;
- the user sends a signal to the GEO satellites (at least two of them);
- each satellite sends the accurate time of arrival of the signal to a ground station;
- the ground station computes the user position and sends this information to the satellites that broadcast the position back to the user.
In addition, the system supports a short message communication service that can be exchanged between the station and the users.
Notes
References
- ^ a b c COMPASS/BeiDou Status, Jun Shen, BNStar Navigation Technology & System, Inc., Rome (Italy), June 11, 2009
- ^ BeiDou Navigation Satellite System in Wikipedia
- ^ BeiDou China’s Rapidly Emerging GNSS, InsideGNSS, May/June 2014
- ^ "Status of COMPASS Development", Stanford PNT Symposium 2010, M. Lu, Tsinghua University