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BeiDou Ground Segment
| COMPASS | |
|---|---|
| Title | BeiDou Ground Segment |
| Edited by | GMV |
| Level | Basic |
| Year of Publication | 2011 |
The Compass Navigation Satellite System (CNSS), also named BeiDou-2, is currently under development evolving from a regional system called BeiDou-1. The ground segment is expanding as COMPASS evolves to global navigation capability, expected by 2020+.
COMPASS Ground Segment
The COMPASS Ground Segment consists of:[1][2]
- 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 Compass satellites.
- Monitor Stations, which collect Compass 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[3].
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
- ^ China Satellite Navigation Office, Development of BeiDou Navigation Satellite System, Munich Satellite Navigation Summit, 2011
- ^ Jun Shen, COMPASS/Beidou-China’s GNSS, BNStarNavigation Technology & System, Inc., Rome, June 11th, 2009
- ^ "Status of COMPASS Development", Stanford PNT Symposium 2010, M. Lu, Tsinghua University