GLONASS Constellation Status (18-07-17) GLONASS M? Kosmos Internat. NORAD Plane Channel Almanac Launch Status Numbers Number ID Catalog Number Date (Date Number (Slot) (UTC) withdrawn) ------------------------------------------------------------------------------- 80 786 2362 1998-077C 25595 30-Dec-98 20-Oct-03 81 784 2363 1998-077B 25594 30-Dec-98 19-Dec-03 82 779 2364 1998-077A 25593 30-Dec-98 8-Jul-02 83 783 2374 2000-063C 26566 13-Oct-00 23-Nov-07 84 787 2375 2000-063A 26564 13-Oct-00 16-Apr-07 85 788 2376 2000-063B 26565 13-Oct-00 29-Mar-06 86 790 2380 2001-053C 26989 1-Dec-01 19-Dec-03 87 789 2381 2001-053B 26988 1-Dec-01 11-Jan-08 88 711 M* 2382 2001-053A 26987 1-Dec-01 11-Jan-08 89 791 2394 2002-060A 27617 25-Dec-02 30-Nov-07 90 792 2395 2002-060C 27619 25-Dec-02 12-Jan-08 91 793 2396 2002-060B 27618 25-Dec-02 16-Apr-07 92 701 M 2404 2003-056A 28112 10-Dec-03 27-Feb-10 93 794 2402 2003-056B 28113 10-Dec-03 11-Jan-08 94 795 2403 2003-056C 28114 10-Dec-03 18-Aug-09 95 712 M 2413 2004-053B 28509 26-Dec-04 23-Jan-15 96 797 2412 2004-053C 28510 26-Dec-04 16-Oct-08 97 796 2411 2004-053A 28508 26-Dec-04 18-Oct-08 98 798 2417 2005-050C 28917 25-Dec-05 12-Jan-08 99 713 M 2418 2005-050B 28916 25-Dec-05 28-Feb-10 100 714 M 2419 2005-050A 28915 25-Dec-05 24-Aug-17 101 715 M 2424 2006-062C 29672 25-Dec-06 6-Oct-17 102 716 M 2425 2006-062A 29670 2 0 15 25-Dec-06 OK 103 717 M 2426 2006-062B 29671 2 -7 10 25-Dec-06 OK 104 718 M 2431 2007-052C 32277 26-Oct-07 20-Oct-11 105 719 M 2432 2007-052B 32276 3 2 20 26-Oct-07 OK 106 720 M 2433 2007-052A 32275 3 3 19 26-Oct-07 OK 107 721 M 2434 2007-065A 32393 2 -2 13 25-Dec-07 OK 108 722 M 2435 2007-065B 32394 25-Dec-07 22-Jul-14 109 723 M 2436 2007-065C 32395 2 -1 12 25-Dec-07 OK 110 724 M 2442 2008-046A 33378 25-Sep-08 23-Jul-14 111 725 M 2443 2008-046B 33379 25-Sep-08 8-Jul-16 112 726 M 2444 2008-046C 33380 25-Sep-08 28-Nov-12 113 727 M 2447 2008-067A 33466 25-Dec-08 28-Nov-12 114 728 M 2448 2008-067C 33468 25-Dec-08 16-Oct-13 115 729 M 2449 2008-067B 33467 25-Dec-08 9-Sep-12 116 730 M 2456 2009-070A 36111 1 1 1 14-Dec-09 OK 117 733 M 2457 2009-070B 36112 1 -4 6 14-Dec-09 OK 118 734 M 2458 2009-070C 36113 1 1 5 14-Dec-09 OK 119 731 M 2459 2010-007A 36400 3 -3 22 1-Mar-10 OK 120 732 M 2460 2010-007C 36402 3 3 23 1-Mar-10 OK 121 735 M 2461 2010-007B 36401 3 2 24 1-Mar-10 OK 122 736 M 2464 2010-041C 37139 2 -1 16 2-Sep-10 OK 123 737 M 2465 2010-041B 37138 2-Sep-10 25-Aug-17 124 738 M 2466 2010-041A 37137 2-Sep-10 6-Jun-16 125 701K K1 2471 2011-009A 37372 3 -5 (20) 26-Feb-11 CHK 126 742 M 2474 2011-055A 37829 1 6 4 2-Oct-11 OK 127 743 M 2475 2011-064C 37869 1 6 8 4-Nov-11 OK 128 744 M 2476 2011-064A 37867 1 5 3 4-Nov-11 OK 129 745 M 2477 2011-064B 37868 1 5 7 4-Nov-11 OK 130 746 M 2478 2011-071A 37938 28-Nov-11 12-Apr-15 131 747 M 2485 2013-019A 39155 1 -4 2 26-Apr-13 OK 132 754 M 2492 2014-012A 39620 3 -3 18 23-Mar-14 OK 133 755 M+ 2500 2014-032A 40001 3 4 21 14-Jun-14 OK 134 702K K1 2501 2014-075A 40315 2 -2 9 30-Nov-14 OK 135 751 M 2514 2016-008A 41330 3 4 17 7-Feb-16 OK 136 753 M 2516 2016-032A 41554 2 0 11 29-May-16 OK 137 752 M 2522 2017-055A 42939 2 -7 14 22-Sep-17 OK 138 756 M 2527 2018-053A 43508 1 16-Jun-18 CHK Notes ----- 1. NORAD Catalog Number is also known as U.S. Space Command (USSPACECOM) object number and (formerly) NASA catalog number. 2. The numbers listed in the "Kosmos Numbers" column are the designators assigned by the Russian Federation. Formerly, NORAD had sometimes assigned different designators due to confusion in first tracking triple-launched satellites. NORAD switched the designators of GLONASS satellites to the Russian ones back to Kosmos 2206 and perhaps to even earlier launched satellites. In 2006, the GLONASS Control Center switched the Kosmos numbers of GLONASS 796 and 712 to 2411 and 2413 respectively in its GLONASS status reports. It was not known if this was a real change or just a typographical error. However, they have persisted with these changes and so the table above has been amended to reflect the changes. GLONASS 754 initially had a Kosmos number of 2491 assigned by the Russian Federation but subsequently changed it to 2492. NORAD used a designation initially of 2494 and subsequently changed it to 2492. 3. In the "M?" column, modernized GLONASS satellites are indicated with "M." "M*" indicates a development or prototype GLONASS-M satellite. K1 satellites can transmit the legacy L1 and L2 signals as well as a new L3 signal. "M+" indicates a GLONASS-M satellite with an L3 transmitter. 4. Channel number, k, indicates L1 and L2 carrier frequencies: L1 = 1602. + 0.5625 k (MHz) k L2 = 1246. + 0.4375 k (MHz) k 5. Almanac number refers to identification in broadcast almanac and/or physical orbital slot. If the satellite is not currently in the broadcast almanac, its physical orbital slot number is given in parentheses. Some GLONASS satellites in test or checkout modes identify themselves in their broadcast ephemerides using satellite numbers above 24, i.e., 25, 26, 27, or 28. 6. Status codes: Main = satellite in maintenance mode. Res = satellite not in service but held in reserve. OK = satellite fully operational. UNH = satellite currently flagged unhealthy. UNH-DE = satellite flagged unhealthy and being decommissioned. CHK = satellite undergoing checkout and/or tests. The date listed is the date the satellite was removed from service (Moscow Time) as reported by the Information - Analytical Centre, Moscow. 7. All GLONASS satellites employ cesium atomic clocks. 8. The first GLONASS satellite was launched on 12 October 1982. GLONASS 1 through 101 are no longer in service nor used as spares. 9. GLONASS 40 and 41 were launched with the Etalon 1 laser ranging satellite. GLONASS 42 and 43 were launched with Etalon 2. 10. The GLONASS numbering scheme used in this table includes the 8 "dummy" satellites orbited as ballast along with "real" satellites on the first 7 GLONASS launches. The second number in the "GLONASS Numbers" column is that assigned by the Russian Space Forces. 11. New GLONASS channel allocations were introduced in September 1993 aimed at reducing interference to radio astronomy. Note the use of the same channel on pairs of antipodal satellites. 12. GLONASS 701K transmitted signals using frequency channel -5 and almanac slot 8 (although then physically between orbital slots 20 and 21) between 6 January 2013 and 25 February 2013 but was set unhealthy (ref. NAGU 002-130109). It was also active using frequency channel -5 and almanac slot 14 between (late on) 20 September 2017 and 5 October 2017. When not in the active constellation, GLONASS 701K is typically identified as satellite 26 in its broadcast ephemeris. It is currently in flight test mode near physical orbital slot 20. GLONASS 701K has been designated as GLONASS 801 by the IGS to prevent confusion with Kosmos 2404, a GLONASS-M satellite launched on 10 December 2003 and called GLONASS 701. 13. GLONASS 702K, the second GLONASS-K1 satellite, was launched on 14 November 2015. During a period of check-out, it transmitted signals using frequency channel -6 and almanac slot 17 (although physically in slot 9; ref. NAGU 002-160129). According to IGS monitoring, transmissions started on 27 January 2016. The satellite was set healthy and introduced into the operational constellation using almanac slot 9 and still on frequency channel -6 on 15 February 2016 (ref. NAGU 010-160216). On or about 23 November 2016, GLONASS 702K switched frequency channels from -6 to -2 (ref. GLONASS Information and Analysis Center). GLONASS 702K has been designated as GLONASS 802 by the IGS. 14. GLONASS 723 was transferred to reserve status on 24 June 2016 (ref. NAGU 032-160624) but was brought back into service on 15 December 2016 (ref. GLONASS Information and Analysis Center. L2 transmissions appear to be impaired (ref. IGS monitoring). 15. GLONASS 733 L2 transmissions appear to be impaired since 8 April 2018 (ref. IGS monitoring). 16. GLONASS 751 has been designated as GLONASS 851 by the IGS to prevent confusion with Kosmos 2080, a GLONASS-IIv satellite launched on 19 May 1990 and also called GLONASS 751. 17. GLONASS 752 became active on 10 October 2017 and was set useable on 16 October 2017. GLONASS 752 has been designated as GLONASS 852 by the IGS to prevent confusion with Kosmos 2081, a GLONASS-IIv satellite launched on 19 May 1990 and also called GLONASS 752. 18. GLONASS 753 has been designated as GLONASS 853 by the IGS to prevent confusion with Kosmos 2140, a GLONASS-IIv satellite launched on 14 April 1991 and also called GLONASS 751. 19. GLONASS 756 was launched from Plesetsk on 16 June 2018 at 21:46:28 UTC into Plane 1. It is currently drifting to its intended orbital slot. 20. Number of GLONASS satellites currently in service: 24. 21. Number of GLONASS satellites currently usable: 24. 22. Constellation plot: Green: healthy satellite Red: unhealthy/unusable satellite Orange: reserve or test satellite. 23. Status of satellites compiled by Richard B. Langley, Dept. of Geodesy and Geomatics Engineering, University of New Brunswick.