GPS World, August 2013

THE ALMANAC KOSMOS NUMBER LAUNCHED USABLE ALMANAC SLOT CHANNEL 118 734 2458 12 14 09 1 10 10 5 1 1 119 731 2459 3 1 10 3 28 10 22 3 3 120 732 2460 3 1 10 3 28 10 23 3 3 121 735 2461 3 1 10 3 28 10 24 2 3 122 736 2464 9 2 10 10 4 10 9 2 2 123 737 2465 9 2 10 10 12 10 12 1 2 124 738 2466 9 2 10 10 11 10 16 1 2 125 701 2471 2 26 11 21 5 3 E 126 742 2474 10 2 11 10 25 11 4 6 1 127 743 2475 11 4 11 3 5 13 8 6 1 F 128 744 2476 11 4 11 12 8 11 3 5 1 129 745 2477 11 4 11 12 23 11 7 5 1 130 746 2478 11 28 11 12 23 11 17 4 3 131 747 2485 4 26 13 7 4 13 2 4 1 G Performance Notes GLONASS NUMBER A GLONASS 95 was set unhealthy on November 22 2012 and is now a reserve satellite B GLONASS 100 is a reserve satellite C GLONASS 108 is a reserve satellite D GLONASS 114 was set unhealthy on July 1 2013 and placed in maintenance mode E GLONASS 125 appeared in the broadcast almanacs between January 6 and February 25 2013 using almanac slot 8 and transmitting on frequency channel 5 The satellite was set unhealthy When not in the active constellation the satellite identifies itself as satellite 26 in its broadcast ephemeris F GLONASS 127 most recently a reserve GLONASS Constellation KOSMOS NUMBER LAUNCHED USABLE ALMANAC SLOT CHANNEL 95 712 2413 12 26 04 10 23 12 8 1 A 100 714 2419 12 25 05 17 3 B 101 715 2424 12 25 06 4 3 07 14 7 2 102 716 2425 12 25 06 10 12 07 15 0 2 103 717 2426 12 25 06 4 3 07 10 7 2 105 719 2432 10 26 07 11 27 07 20 2 3 106 720 2433 10 26 07 11 25 07 19 3 3 107 721 2434 12 25 07 2 8 08 13 2 2 108 722 2435 12 25 07 14 2 C 109 723 2436 12 25 07 1 22 08 11 0 2 110 724 2442 9 25 08 10 26 08 18 3 3 111 725 2443 9 25 08 11 5 08 21 4 3 114 728 2448 12 25 08 2 1 D 116 730 2456 12 14 09 1 30 10 1 1 1 117 733 2457 12 14 09 1 24 10 6 4 1 General Notes ORBIT PLANE NOTES carrier frequencies L1 1602 05625 k MHz L2 1246 04375 k MHz 9 All GLONASS satellites use cesium atomic 10 Twenty four GLONASS satellites are set 11 The latest successful GLONASS launch of a single satellite was on April 26 2013 An attempt to launch three satellites on July 2 2013 failed when the rocket exploded The next single satellite launches are scheduled for fall 2013 12 New GLONASS channel allocations were introduced September 1993 to reduce interference to radio astronomy Note the use of the same channel on pairs of antipodal satellites 13 GPS World believes this information to be correct as of press time However because of the satellite constellations evolving nature we encourage readers to contact the GLONASS sources listed on these pages for more current information 14 Information compiled by Richard Langley GLONASS Satellite System Information Information Analytical Center IAC Russian Space Agency www glonass ianc rsa ru The IAC publishes official information about GLONASS status and plans as well as consultation information and scientific method services to increase GLONASS applications efficiency It provides current constellations Earth maps of the current and daily navigation availabilities results of GNSS navigation field monitoring in the Moscow area in a real time mode and other data For more information IAC Mission Control Center email glonass ianc@ mcc rsa ru THE GLONASS K Satellite A Inmarsat 3 F2 began Safety of Life Service on Notes March 2 2011 and is transmitting message type 2 B Artemis switched roles with Inmarsat 4 F2 on March 22 23 2012 Now transmitting message type 0 0 for industry tests C Inmarsat 4 F2 began Safety of Life Service on March 22 2012 and is transmitting message type 2 D SES 5 also known as Sirius 5 and Astra 4B was launched on July 9 2012 Not yet active E GSAT 8 was launched on May 20 2011 Satellite is transmitting test signals F GSAT 10 was launched on September 28 2012 Satellite is transmitting test signals G MSAS commissioned for aviation use on September 27 2007 Either satellite can transmit both PRN signals if necessary H QZS 1 nicknamed Michibiki transmits an L1 augmentation signal using PRN code 183 That ORBIT PLANE NOTES satellite was re introduced into the active constellation on December 25 2012 using frequency channel 6 and almanac slot 8 It was physically moved from orbital slot 2 to slot 8 between about January 5 and February 12 2013 The satellite was set unhealthy during the move GLONASS 127 was set healthy again on March 5 2013 transmitting on frequency channel 6 and using almanac slot 8 G GLONASS 131 was launched on April 26 2013 and initially held as a reserve satellite It was introduced into the active constellation and set healthy on July 4 2013 transmitting on frequency channel 4 and using almanac slot 2 signal is in test mode I Luch 5A was launched on December 11 2011 Initially positioned at 585 E it was shifted to 95 E between about May 30 and June 28 2012 Transmissions as PRN 140 began on July 12 2012 Currently transmitting occasional noncoherent code carrier test signals J Luch 5B was launched on November 2 2012 and started transmitting test signals on January 17 2013 K Galaxy 15 ranging supports enroute through precision approach modes Switched to backup satellite oscillator on January 6 2012 L Anik F1R ranging supports enroute through precision approach modes M The Galaxy 15 and and Anik F1R payloads operated by Lockhhed Martin for the FAA are known as LMPRS 1 and LMPRS 2 respectively N Inmarsat 4 F3 supports non precision approach ranging service GLONASS NUMBER 1 The first GLONASS satellite was launched October 12 1982 2 The GLONASS numbering scheme used in this table includes the eight dummy satellites orbited as ballast along with real satellites on the first seven GLONASS launches The second number in parentheses in the GLONASS Number column is that assigned by the Russian Space Forces 3 The Russian Federation designated the Kosmos Number 4 GLONASS numbers 1 94 have been withdrawn from service 5 All operational satellites are GLONASS M satellites except GLONASS 125 which is a GLONASS K1 satellite 6 All launch and usable dates are based on Moscow Time Universal Time 3 hours 7 Almanac slot numbers in parentheses indicate the physical orbital slot of reserve test satellites or those in maintenance and not in the almanac 8 Channel number k indicates L1 and L2 clocks healthy Satellite Based Augmentation Systems SBAS SATELLITE ORBIT LONGITUDE PRN NO NOTES EGNOS Inmarsat 3 F2 AOR E 155 W 120 A Artemis 215 E 124 B Inmarsat 4 F2 25 E 126 C SES 5 5 E 136 D GAGAN GSAT 8 55 E 127 E GSAT 10 83 E 128 F MSAS MTSAT 1R 140 E 129 G MTSAT 2 145 E 137 G QZSS QZS 1 135 E 183 H SDCM Luch 5A 95 E 140 I Luch 5B 16 W 125 J WAAS Intelsat Galaxy 15 CRW 133 W 135 K M TeleSat Anik F1R CRE 1073 W 138 L M Inmarsat 4 F3 AMR 98 W 133 N GPS World August 2013 www gpsworld com 48