This page provides an overview of the Satellites used in worldwide Satellite Based Augmentation Systems.
|System||Common Name||Longitude||Int. Sat. ID||NORAD ID||PRN||Signals||Notes|
|EGNOS||Inmarsat 3-F2 (AOR-E)||15.5°W||1996-053A||24307||120||L1||Inmarsat 3-F2 began Safety-of-Life Service on March 2, 2011, and is transmitting message type 2.|
|Inmarsat 4-F2 (IOR-W)||25°E||2005-044A||28899||126||L1||Inmarsat-4-F2 began Safety-of-Life Service on March 22, 2012, and is transmitting message type 2.|
|SES-5 (Sirius-5, Astra-4B)||5°E||2012-036A||38652||136||L1/L5||Launched 2012/07/10, operational since Sep. 02, 2015.|
|Astra-5B||31.5°E||2014-011B||39617||123||L1/L5||Launched March 22, 2014. Transmission of L1 test signals started Dec. 11, 2014.|
|GAGAN||GSAT-8||55°E||2011-022A||37605||127||L1/L5||Launched May 20, 2011. Certifed horizontal/vertical service since Feb. 2014 / April 2015.|
|GSAT-10||83°E||2012-051B||38779||128||L1/L5||Launched Sep. 28, 2012. Certifed horizontal/vertical service since Feb. 2014 / April 2015.|
|MSAS||MTSAT-1R||140°E||2005-006A||28622||129||L1||MSAS commissioned for aviation use on September 27, 2007. Either satellite can transmit both PRN signals if necessary.|
|MTSAT-2||145°E||2006-004A||28937||137||L1||MSAS commissioned for aviation use on September 27, 2007. Either satellite can transmit both PRN signals if necessary.|
|QZSS||QZS-1||135°E||2010-045A||37158||183||L1||See QZSS Status Page|
|SDCM||Luch-5A||167°E||2011-074B||37951||140||L1||Launched on December 11, 2011. Initially positioned at 58.5°E, it was shifted to 95°E between about May 30 and June 28, 2012, then shifted 167°E between about Nov. 30 and Dec. 22, 2012. Transmissions as PRN 140 began on July 12, 2012. Transmitted occasional, non-coherent code/carrier test signals.|
|Luch-5B||16°W||2014-023A||39727||141||L1||Launched April28, 2014. Testing may have started using PRN 140, not 141.|
|Luch-5V||16°W||2012-061A||38977||125||L1||Launched Nov. 2, 2012, and started transmitting signals on Jan. 17, 2013.|
|WAAS||TeleSat Anik F1R (CRE)||107.3°W||2005-036A||28868||138||L1/L5||Anik F1R ranging supports enroute through precision approach modes. The payload, operated by Lockheed Martin for the FAA, is known as LMPRS-2.|
|Intelsat Galaxy 15 (CRW)||133°W||2005-041A||28884||135||L1/L5||Galaxy 15 ranging supports enroute through precision approach modes. Switched to backup satellite oscillator on Jan. 6, 2012. The payload, operated by Lockheed Martin for the FAA, is known as LMPRS-1.|
|Inmarsat 4-F3 (AMR)||98°W||2008-039A||33278||133||L1/L5||Inmarsat-4-F3 supports non-precision approach ranging service.|
- The information given above is largely based on the The Almanac maintained by R. Langley for the GPS World magazine.
- Dual-frequency (L1/L5) observations of WAAS and GAGAN satellites are provided by a limited set of monitoring stations of the MGEX network. The respective stations and tracked satellites are listed in the RINEX Observation File Summary generated on a daily basis by the Astronomical Institute of the University of Bern.
- In RINEX observations and navigation files, SBAS satellites are identified by a three character satellite number made up of the constellation letter "S" and the two digit number nn=PRN-100. For QZSS (see QZSS Interface Specification, different PRN numbers are employed for the L1 SAIF SBAS signal (PRN(SAIF)=183, 184, ...) and the other ranging signals (PRN(std)=193,194,...). In order to ensure a unique RINEX satellite number for each QZSS satellite, it is recommended to use the satellite number "Jnn" with n=PRN(SAIF)-183 (=PRN(std)-193) when referring to QZSS SAIF observations or navigation messages. The use of an SBAS RINEX satellite number "Snn" with nn=PRN(SAIF)-100 is deprecated for QZSS satellites.
- Information on SBAS system status is available at the ESA EGNOS web site and the WAAS test team web site of the US Federal Aviation Administration (FAA).
- For the assignment of GPS and SBAS PRN numbers see the information page of the Los Angeles Air Force Base.
- On March 22 and 23, 2012, Inmarsat-4-F2 at 25 degrees east using PRN126 and Artemis at 21.5 degrees east using PRN124 switched roles. PRN126 became an EGNOS operational signal-in-space satellite while PRN124 became the test satellite, transmitting message type 0. PRN120 and PRN126 returned to service around 17:00 UTC on Tuesday, June 26. According to an EGNOS service announcement dated April 3, 2012 the switch was due to the aging state of the Artemis satellite. (Source: CANSPACE, GPS World)
Last Updated: 2017/01/23 15:58:23