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BeiDou User Segment: Difference between revisions
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The [[ | The [[BeiDou_General_Introduction|BeiDou Navigation Satellite System (BDS)]], also known as BeiDou-2<ref name=BDS_STATUS>[http://www.filasinternational.eu/sidereus-project/pdf/02.pdf 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>[http://www.insidegnss.com/node/3590 BeiDou China’s Rapidly Emerging GNSS, InsideGNSS, May/June 2014]</ref>. | ||
With continuous efforts put on compatibility and interoperability of the system, the | With continuous efforts put on compatibility and interoperability of the system, the BeiDou user segment and respective applications are expected to be very similar to all other GNSSs for the [[BeiDou Services|open service]]. BeiDou has one particularity over all the other GNSSs: the capability of allowing exchange of [[BeiDou Services|short message services]] between ground stations and users. | ||
== | ==BeiDou User Segment== | ||
The | The BeiDou User Segment consists of Beidou user terminals<ref name=BEIDOU_MUNICH_2011>China Satellite Navigation Office, ''Development of BeiDou Navigation Satellite System'', Munich Satellite Navigation Summit, 2011.</ref>, which receive BeiDou navigation signals, determine pseudoranges (and other observables) and solve the navigation equations in order to obtain their coordinates. A [[BeiDou Receivers|BeiDou receiver]] is a device capable of determining the user position, velocity and precise time (PVT) by processing the signal broadcasted by BeiDou satellites. Any navigation solution provided by a GNSS Receiver is based on the computation of its distance to a set of satellites, by means of extracting the propagation time of the incoming signals traveling through space at the speed of light, according to the satellite and receiver local clocks<ref name="GNSS-Book ">J. Sanz Subirana, JM. Juan Zornoza and M. Hernández-Pajares, ''Global Navigation Satellite Systems: Volume I: Fundamentals and Algorithms''</ref>. It should be noted that in the first version of the system, BeiDou-1, the user position was computed by the ground station and relayed back to the user via GEO satellite. | ||
In June 2011, the system has completed the ground segment commissioning, including the test section of the user terminal development<ref>[http://www.cnkeyword.info/compass-system-10-months-to-complete-a-comprehensive-test-covering-the-asia-pacific-region-next-year/ ''Compass system 10 months to complete a comprehensive test covering the Asia Pacific region next year''] China news, 20th June 2011.</ref>. The first generation of BeiDou-1 terminals emerged in 2003 with full Radio Determination Satellite Service (RDSS) functionality and communication terminal based on General Purpose ICs. The second generation appeared in 2009 based in ASIC and comprising already GPS integration<ref>"Status of COMPASS Development", M. Lu, Stanford PNT Symposium 2010</ref>. | In June 2011, the system has completed the ground segment commissioning, including the test section of the user terminal development<ref>[http://www.cnkeyword.info/compass-system-10-months-to-complete-a-comprehensive-test-covering-the-asia-pacific-region-next-year/ ''Compass system 10 months to complete a comprehensive test covering the Asia Pacific region next year''] China news, 20th June 2011.</ref>. The first generation of BeiDou-1 terminals emerged in 2003 with full Radio Determination Satellite Service (RDSS) functionality and communication terminal based on General Purpose ICs. The second generation appeared in 2009 based in ASIC and comprising already GPS integration<ref>"Status of COMPASS Development", M. Lu, Stanford PNT Symposium 2010</ref>. | ||
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==Applications== | ==Applications== | ||
[[GNSS Applications|GNSS applications]] are all those applications that use GNSS signals to collect position, velocity and time information to be used by the application. For instance, the position and velocity provided by a | [[GNSS Applications|GNSS applications]] are all those applications that use GNSS signals to collect position, velocity and time information to be used by the application. For instance, the position and velocity provided by a BeiDou user terminal may be used for different kinds of applications (civil, military, scientific) such as<ref name=BEIDOU_MUNICH_2011/>: | ||
* Fishery: fishermen safety, oceanic and economic security, protection of sovereignty and resources: 14000 fisher users were reported and more than 500 vessel rescue and costal alarm systems have been equipped with BeiDou terminals; | * Fishery: fishermen safety, oceanic and economic security, protection of sovereignty and resources: 14000 fisher users were reported and more than 500 vessel rescue and costal alarm systems have been equipped with BeiDou terminals; | ||
Revision as of 16:58, 26 May 2014
| BEIDOU | |
|---|---|
| Title | BeiDou User 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]. With continuous efforts put on compatibility and interoperability of the system, the BeiDou user segment and respective applications are expected to be very similar to all other GNSSs for the open service. BeiDou has one particularity over all the other GNSSs: the capability of allowing exchange of short message services between ground stations and users.
BeiDou User Segment
The BeiDou User Segment consists of Beidou user terminals[4], which receive BeiDou navigation signals, determine pseudoranges (and other observables) and solve the navigation equations in order to obtain their coordinates. A BeiDou receiver is a device capable of determining the user position, velocity and precise time (PVT) by processing the signal broadcasted by BeiDou satellites. Any navigation solution provided by a GNSS Receiver is based on the computation of its distance to a set of satellites, by means of extracting the propagation time of the incoming signals traveling through space at the speed of light, according to the satellite and receiver local clocks[5]. It should be noted that in the first version of the system, BeiDou-1, the user position was computed by the ground station and relayed back to the user via GEO satellite.
In June 2011, the system has completed the ground segment commissioning, including the test section of the user terminal development[6]. The first generation of BeiDou-1 terminals emerged in 2003 with full Radio Determination Satellite Service (RDSS) functionality and communication terminal based on General Purpose ICs. The second generation appeared in 2009 based in ASIC and comprising already GPS integration[7].
There is also an international cooperation in terms of Compatibility and Interoperability between BeiDou and other GNSSs[4]. The BeiDou Navigation Satellite System Signal In Space Interface Control Document (Test Version) was published in December 2011; there is still no confirmation on when an updated version will be available[8].
Applications
GNSS applications are all those applications that use GNSS signals to collect position, velocity and time information to be used by the application. For instance, the position and velocity provided by a BeiDou user terminal may be used for different kinds of applications (civil, military, scientific) such as[4]:
- Fishery: fishermen safety, oceanic and economic security, protection of sovereignty and resources: 14000 fisher users were reported and more than 500 vessel rescue and costal alarm systems have been equipped with BeiDou terminals;
- Disaster Prevention and Mitigation: improvement of rescue response and decision-making capability due to rapid and timely disaster alert, support to rescue operations regarding command scheduling and rapid communication. BeiDou terminals were used in the operations that followed the earthquakes in Wenchuan (Sichuan Province) and Yushu (Qinghai Province);
- Timing: Beidou/GPS multi-mode time synchronization devices, with a reported synchronization accuracy better than 100 ns;
- Other applications include transportation, water management, meteorology, forest fire prevention, soil monitoring and coal mine safety monitoring.
Notes
References
- ^ a b 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
- ^ a b c China Satellite Navigation Office, Development of BeiDou Navigation Satellite System, Munich Satellite Navigation Summit, 2011.
- ^ J. Sanz Subirana, JM. Juan Zornoza and M. Hernández-Pajares, Global Navigation Satellite Systems: Volume I: Fundamentals and Algorithms
- ^ Compass system 10 months to complete a comprehensive test covering the Asia Pacific region next year China news, 20th June 2011.
- ^ "Status of COMPASS Development", M. Lu, Stanford PNT Symposium 2010
- ^ Munich Summit Charts Progress of GPS, GLONASS, Galileo, Beidou GNSSes, InsideGNSS, March 2012