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SDCM
| Other SBAS | |
|---|---|
| Title | SDCM |
| Author(s) | 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]
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 Architecture and Performances
The SDCM system will use a network of ground reference stations: around 20 stations in Russia (2 of them in the Antarctic) and 4 more stations outside Russia, including sites in Australia and South America.[3] There will be also a central processing facility and up-link stations.
The system will also count with three geostationary satellites, which will be launched in the coming years. The InsideGNSS stated that they apparently will be an extension of the Luch communications satellite design ([...]manufactured by Reshetnev) introduced in the 1980s as part of the Soviet Union’s satellite data relay network.[2] The planned location of these three satellites is as follows:
- Luch-5A: 16 degrees west.
- Luch-5B: 95 degrees east.
- Luch-4: 167 degrees east.
With this architecture the whole Russian Federation will be covered as the SDCM Service Area.[3]
- Sdcm overview.png
SDCM planned station network
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]
SDCM Near Future
SDCM is expected to be certified in the coming years, as an SBAS counterpart to GPS WAAS and the European EGNOS. The SDCM certification will represent just the first step in the SDCM strategy which pursues also other broadcast means –potentially a polar MEO– with the aim of providing also a service to the North part of Russia.
Notes
References
- ^ a b SDCM home page.
- ^ a b c Glen Gibbons, Russia Building Out GLONASS Monitoring Network, Augmentation System Inside GNSS News, September/October 2009
- ^ a b Sergey Revnivykh (Russian Federal Space Agency), GLONASS Updates, Munich Satellite Navigation Congress, March 2011