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The [[COMPASS General Introduction|Compass Navigation Satellite System (CNSS)]], also named BeiDou-2,<ref name=Chinese_today>[http://www.sinodefence.com/space/satellite/compass-beidou2.asp Compass Satellite Navigation System (Beidou), on Sinodefence.com, updated on August 6th, 2011.] </ref> is China’s second-generation satellite navigation system that will be capable of providing positioning, navigation, and timing services to users on a continuous worldwide basis.<ref name=Chinese_today/><ref name=COMPASS_Wiki>[http://en.wikipedia.org/wiki/Compass_navigation_system COMPASS Navigation system in Wikipedia]</ref>
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]]. Although the current ground segment consists of one master control station, two upload stations and 30 monitoring stations<ref>"Status of COMPASS Development", Stanford PNT Symposium 2010, M. Lu, Tsinghua University</ref>, it may expand as the system evolves.
 
Although the upgrade of its regional navigation system towards a global solution started in 1997, the formal approval by the Government of the development and deployment of BeiDou-2/CNSS was done in 2004.<ref name=Chinese_today/> The system is currently under development evolving from a regional system called [[Other Regional Systems|BeiDou-1]], and in the first phase will provide high-accuracy positioning services for users in China and its neighboring regions by 2012.<ref name=Chinese_today/> In a second stage, the system will evolve to provide global navigation services by 2020, similarly to the [[GPS General Introduction|GPS]], [[GLONASS General Introduction|GLONASS]] or [[GALILEO General Introduction|Galileo]] systems.<ref name=Chinese_today/>
 


==COMPASS Ground Segment==
==COMPASS Ground Segment==

Revision as of 16:57, 22 November 2011


COMPASSCOMPASS
Title BeiDou Ground Segment
Author(s) GMV
Level Basic
Year of Publication 2011
Logo GMV.png

The Compass Navigation Satellite System (CNSS), also named BeiDou-2, is currently under development evolving from a regional system called BeiDou-1. Although the current ground segment consists of one master control station, two upload stations and 30 monitoring stations[1], it may expand as the system evolves.

COMPASS Ground Segment

COMPASS Ground Segment

The COMPASS Ground Segment consists of:[2][3]

  • 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[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

  1. ^ "Status of COMPASS Development", Stanford PNT Symposium 2010, M. Lu, Tsinghua University
  2. ^ China Satellite Navigation Office, Development of BeiDou Navigation Satellite System, Munich Satellite Navigation Summit, 2011
  3. ^ Jun Shen, COMPASS/Beidou-China’s GNSS, BNStarNavigation Technology & System, Inc., Rome, June 11th, 2009
  4. ^ "Status of COMPASS Development", Stanford PNT Symposium 2010, M. Lu, Tsinghua University
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