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The [[COMPASS General Introduction|Compass Navigation Satellite System (CNSS)]], also named BeiDou-2, is currently under development evolving from a regional system called [[Other Regional Systems|BeiDou-1]]. The ground segment
The [[BeiDou_General_Introduction|BeiDou Navigation Satellite System (BDS)]], also known as BeiDou-2<ref name=BDS_STATUS>COMPASS/BeiDou Status, Jun Shen, BNStar Navigation Technology & System, Inc., Rome (Italy), June 11, 2009</ref>, is China’s second-generation satellite navigation system<ref name=BDS_STATUS/><ref>[https://en.wikipedia.org/wiki/Beidou_Navigation_Satellite_System BeiDou Navigation Satellite System in Wikipedia]</ref> that will be capable of providing positioning, navigation, and timing services to users on a continuous worldwide basis<ref name=BDS_WORLDWIDE> BeiDou China’s Rapidly Emerging GNSS, InsideGNSS, May/June 2014</ref>. The ground segment is expanding as [[BeiDou_Future_and_Evolutions|BeiDou evolves]] to global navigation capability, expected by 2020+.
is expanding as [[COMPASS_Future_and_Evolutions|COMPASS evolves]] to global navigation capability, expected by 2020+.


==COMPASS Ground Segment==
==BeiDou Ground Segment==
[[File:CompassAntenas.PNG|COMPASS Ground Segment|thumb|250px]]
[[File:CompassAntenas.PNG|BeiDou Ground Segment|thumb|250px]]


The COMPASS Ground Segment consists of:<ref name=BEIDOU_MUNICH_2011>China Satellite Navigation Office, Development of BeiDou Navigation Satellite System, Munich Satellite Navigation Summit, 2011</ref><ref>[http://www.filasinternational.eu/sidereus-project/pdf/02.pdf Jun Shen, ''COMPASS/Beidou-China’s GNSS'', BNStarNavigation Technology & System, Inc., Rome, June 11th, 2009]</ref>
The BeiDou Ground Segment consists of:<ref name=BDS_STATUS/>


* a Master Control Station: responsible for satellite constellation control and processing the measurements received by the Monitor Stations to generate the navigation message.
* 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. 
* Upload Stations: responsible for uploading the orbital corrections and the navigation message to BeiDou satellites;
* Monitor Stations, which collect Compass data for all the satellites in view from their locations.
* 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<ref>"Status of COMPASS Development", Stanford PNT Symposium 2010, M. Lu, Tsinghua University</ref>.
Currently, the Ground Segment includes one Master Control Station, two Upload Stations and 30 Monitor Stations<ref>"Status of COMPASS Development", Stanford PNT Symposium 2010, M. Lu, Tsinghua University</ref>.


It should be noted that BeiDou-1 is based on GEO communication satellites for the Radio Determination Satellite System (RDSS) [[COMPASS Services|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.
In addition, the system supports a short message communication service that can be exchanged between the station and the users.

Latest revision as of 15:12, 10 August 2018


BEIDOUBEIDOU
Title BeiDou Ground Segment
Edited by GMV
Level Basic
Year of Publication 2011
Logo GMV.png

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]. The ground segment is expanding as BeiDou evolves to global navigation capability, expected by 2020+.

BeiDou Ground Segment

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].


In addition, the system supports a short message communication service that can be exchanged between the station and the users.

Notes

References

  1. ^ a b c COMPASS/BeiDou Status, Jun Shen, BNStar Navigation Technology & System, Inc., Rome (Italy), June 11, 2009
  2. ^ BeiDou Navigation Satellite System in Wikipedia
  3. ^ BeiDou China’s Rapidly Emerging GNSS, InsideGNSS, May/June 2014
  4. ^ "Status of COMPASS Development", Stanford PNT Symposium 2010, M. Lu, Tsinghua University
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