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SDCM
| Other SBAS | |
|---|---|
| Title | SDCM |
| Edited by | GMV |
| Level | Basic |
| Year of Publication | 2011 |
The System for Differential Corrections and Monitoring (SDCM) is the SBAS currently being developed in the Russian Federation[1][2] as a component of GLONASS.[3]
The main differentiator of SDCM with respect to other SBAS systems is that it is conceived as an SBAS augmentation that would perform integrity monitoring of both GPS and GLONASS satellites, whereas the rest of current SBAS initiatives provide corrections and integrity just to GPS satellites.
SDCM Ground Segment
The main components of the SDCM Ground Segment are a network of reference stations, central processing facilities, uplink stations and terrestrial broadcast means.
The SDCM network of reference stations is composed of 18 stations in Russia and 3 stations abroad. The central processing facilities are located in Moscow and it is complemented by a reserve facility[4].
In addition to the GEO broadcast, it is foreseen that SDCM provides internet and GSM broadcast from a SISNeT server and an NTRIP server.[3]
SDCM Space Segment
SDCM uses transponders on the Luch Multifunctional Space Relay System geostationary communication satellites to transmit correction and integrity data using the GPS L1 frequency. The SDCM Space Segment will be composed of 3+1 GEO satellites:[3]
| Satellite | Location | Launch | Lifespan |
|---|---|---|---|
| Luch-5A | 16 deg West | late 2011 | 10 years |
| Luch-5B | 95 deg East | Q3 2012 | 10 years |
| Luch-5 | 167 deg East | 2014 | 10/15 years |
| Luch-4 | 2016 |
SDCM Objectives and Performances
With this architecture the whole Russian Federation will be covered as the SDCM Service Area.[5]
The SDCM objectives are:[1]
- Integrity monitoring of GNSS satellites (GPS and GLONASS)
- Provide differential corrections to GLONASS satellites
- A posteriori detail analysis of GLONASS system performances.
The positioning performance provided by SDCM will be of 1 to 1.5 meters in the horizontal plane and of 2 to 3 meters in vertical. In addition, it is expected to offer a cm-level positioning service for users at a range of 200 kilometers of the reference stations.[2]
Notes
References
- ^ a b SDCM home page.
- ^ a b Glen Gibbons, Russia Building Out GLONASS Monitoring Network, Augmentation System Inside GNSS News, September/October 2009
- ^ a b c d System for Differential Correction and Monitoring Update, Sergey KARUTIN, Deputy head of division, Russian Space Systems, presented at ION GNSS 2011
- ^ http://www.oosa.unvienna.org/pdf/sap/2012/un-latvia/ppt/1-2.pdf
- ^ Sergey Revnivykh (Russian Federal Space Agency), GLONASS Updates, Munich Satellite Navigation Congress, March 2011