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Orbits


Tyneside, UK
2025 Feb 19
Wednesday, Day 50

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Geosynchronous Satellites - US Government and Military

This a list of satellites mainly in the series of named 'USA xxx' or carrying the predecessor 'OPS' designations. It is in order of geographical location round the equator.

This page is a snapshot and is updated frequently. The more inclined or eccentric the orbit, the larger the error margin of the geosynchronous location. Even the worst case should, however, be within ±3 degrees of reality. Only satellites exhibiting less than 0.25° per day of drift are included.

Appearance in this list does not mean that the satellite is operational or under control at its location. Some older, non-working, satellites have drifted to 'wells' in the Earth's gravitational field and oscillate around that location.

Updated: 2025 Feb 18, 04:47 UTC

Longi-
tude (°)
Satellite Cat
no
Desig- nation Orbit
Epoch
Orbit
10.0 WUSA 269 (SDS [-3 F-8?])417242016-047A2024 Nov 2535771 x 35804 km, 1436.1 min, 3°.0
12.0 WUSA 275 (Wideband Global SATCOM 9)420752017-016A2025 Feb 1735781 x 35792 km, 1436.1 min, 0°.0
15.5 WMUOS 3 (Mobile User Objective System 3)403742015-002A2025 Feb 1735555 x 36018 km, 1436.1 min, 3°.6
16.5 WUSA 235 (AEHF 2)382542012-019A2025 Feb 1735775 x 35797 km, 1436.1 min, 5°.5
22.9 WUSA 146 (UFO F-10)259671999-063A2025 Feb 1735762 x 35809 km, 1436.1 min, 9°.6
23.5 WOPS 6393 (FltSatCom F-3)116691980-004A2025 Feb 1635690 x 35876 km, 1435.9 min, 7°.2
24.0 WUSA 236 (SDS-3 F-6)384662012-033A2024 Nov 2435756 x 35818 km, 1436.1 min, 6°.5
24.7 WOPS 4258 (Aquacade 3)105081977-114A2025 Feb 335700 x 35884 km, 1436.4 min, 11°.3
26.7 WUSA 139 (Mentor 2, Advanced Orion 2)253361998-029A2025 Jan 2935639 x 35935 km, 1436.1 min, 7°.4
39.8 WUSA 127 (UFO F-7)239671996-042A2025 Feb 1735754 x 35791 km, 1435.4 min, 10°.7
42.5 WUSA 195 (Wideband Global SATCOM 1)322582007-046A2025 Feb 1735780 x 35793 km, 1436.1 min, 0°.1
49.3 WUSA 159 (DSP F-21)268802001-033A2025 Feb 1735781 x 35788 km, 1436.0 min, 12°.3
49.8 WUSA 241 (SBIRS GEO 2)391202013-011A2025 Feb 1735778 x 35796 km, 1436.1 min, 3°.5
52.5 WUSA 243 (Wideband Global SATCOM 5)391682013-024A2025 Feb 1435785 x 35788 km, 1436.1 min, 0°.0
67.5 WUSA 288 (AEHF 4)436512018-079A2025 Feb 1735567 x 36006 km, 1436.1 min, 1°.6
90.0 WUSA 99 (Milstar 1 DFS)229881994-009A2025 Feb 1735774 x 35800 km, 1436.1 min, 16°.9
100.0 WMUOS 1 (Mobile User Objective System 1)380932012-009A2025 Feb 1735554 x 36019 km, 1436.1 min, 4°.5
104.5 WOPS 0441 (Vortex 4)146751984-009A2025 Feb 1732139 x 39489 km, 1437.5 min, 6°.0
105.1 WMUOS 5 (Mobile User Objective System 5)416222016-041A2025 Feb 1734971 x 36602 km, 1436.1 min, 3°.3
111.4 WOPS 9431 (DSCS II A-1)55871971-095A2025 Feb 1735763 x 35808 km, 1436.1 min, 2°.8
111.7 WSTPSat 6 (Space Test Program Satellite)498172021-118A2025 Feb 1735776 x 35797 km, 1436.1 min, 0°.0
112.1 WUSA 135 (DSCS III F-10)250191997-065A2025 Feb 1735764 x 35810 km, 1436.1 min, 12°.2
120.0 WUSA 115 (Milstar 2 DFS)237121995-060A2025 Feb 1735767 x 35806 km, 1436.1 min, 13°.9
122.1 WUSA 167 (DSCS III F-13)276912003-008A2025 Feb 1735767 x 35804 km, 1436.0 min, 10°.0
124.3 WUSA 246 (AEHF 3)392562013-050A2025 Feb 1735402 x 36170 km, 1436.1 min, 4°.1
127.1 WUSA 162 (SDS-3 F-2)269482001-046A2024 Apr 3035772 x 35802 km, 1436.1 min, 12°.9
135.2 WUSA 244 (Wideband Global SATCOM 6)392222013-041A2025 Feb 1735786 x 35787 km, 1436.1 min, 0°.0
150.1 WUSA 157 (Milstar 4)267152001-009A2025 Feb 1735623 x 35950 km, 1436.1 min, 11°.0
159.4 WUSA 282 (SBIRS GEO 4)431622018-009A2025 Feb 1735776 x 35796 km, 1436.1 min, 2°.1
165.4 WUSA 149 (DSP F-20)263562000-024A2025 Feb 1735783 x 35790 km, 1436.1 min, 12°.8
177.0 WMUOS 2 (Mobile User Objective System 2)392062013-036A2025 Feb 1735567 x 36006 km, 1436.1 min, 4°.1
179.6 WUSA 148 (DSCS III F-11)260522000-001A2025 Feb 1735770 x 35800 km, 1436.0 min, 11°.1
179.8 EUSA 211 (Wideband Global SATCOM 3)361082009-068A2025 Feb 1535785 x 35788 km, 1436.1 min, 0°.2
175.0 EUSA 263 (Wideband Global SATCOM 7)407462015-036A2025 Feb 1635760 x 35824 km, 1436.4 min, 0°.0
172.1 EUSA 108 (UFO F-4)234671995-003A2025 Feb 1735776 x 35797 km, 1436.1 min, 9°.7
170.0 EUSA 252 (SDS [-3 F-7?] )397512014-027A2020 Jun 1735771 x 35803 km, 1436.1 min, 2°.7
152.1 EUSA 169 (Milstar 6)277112003-012A2025 Feb 1735368 x 36206 km, 1436.1 min, 11°.6
149.8 EUSA 272 (Wideband Global SATCOM 8)418792016-075A2025 Feb 1735786 x 35788 km, 1436.1 min, 0°.0
142.9 EUSA 324 (GSSAP 5)512802022-006A2025 Feb 135765 x 35784 km, 1435.5 min, 0°.3
139.0 EUSA 336 (SBIRS GEO 6)533552022-092A2025 Feb 1735776 x 35797 km, 1436.1 min, 4°.2
137.7 EUSA 298 (AEHF 6)454652020-022B2025 Feb 1735579 x 35992 km, 1436.0 min, 3°.6
134.4 EUSA 153 (DSCS III F-12)265752000-065A2025 Feb 1735778 x 35793 km, 1436.0 min, 10°.8
134.1 EUSA 283 (Continuous Broadcast Augmenting SATCOM)433392018-036A2025 Feb 1635785 x 35787 km, 1436.1 min, 0°.0
128.6 EUSA 257 (CLIO)402082014-055A2020 Jun 2835721 x 35847 km, 1436.0 min, 0°.1
126.4 EUSA 110 (Mentor 1, Advanced Orion 1)235671995-022A2021 Jan 1735652 x 35922 km, 1436.1 min, 15°.1
125.5 EUSA 46 (FltSatCom F-8)202531989-077A2025 Jan 2735758 x 35820 km, 1436.2 min, 12°.6
119.2 EUSA 332 (Wide Field of View Testbed)529402022-073A2025 Feb 1735774 x 35797 km, 1436.1 min, 2°.5
116.1 EUSA 271 (GSSAP 4)417452016-052B2025 Jan 435817 x 35828 km, 1437.9 min, 2°.8
112.9 EUSA 270 (GSSAP 3)417442016-052A2025 Jan 435748 x 35757 km, 1434.3 min, 2°.8
110.1 EUSA 155 (SDS-3 F-1)266352000-080A2021 Jan 1335726 x 35847 km, 1436.1 min, 9°.3
105.5 EUSA 268 (Mentor 8, Advanced Orion 7)415842016-036A2021 Sep 735580 x 35995 km, 1436.1 min, 6°.3
102.8 EOPS 9432 (DSCS II A-2)55881971-095B2025 Feb 1735737 x 35774 km, 1434.5 min, 2°.8
96.1 EOPS 0757 (TacSat)36911969-013A2025 Feb 1735650 x 35826 km, 1433.6 min, 1°.6
95.5 EUSA 223 (Mentor 5, Advanced Orion 5)372322010-063A2021 Sep 735643 x 35931 km, 1436.1 min, 5°.1
95.4 EOPS 8790 (AQUACADE 4)107871978-038A2025 Feb 1735650 x 35796 km, 1432.9 min, 4°.4
92.1 EUSA 279 (SDS-4 F1?)429492017-066A2021 Sep 635771 x 35804 km, 1436.1 min, 2°.8
90.0 EUSA 292 (AEHF 5)444812019-051A2025 Feb 1735536 x 36038 km, 1436.1 min, 2°.2
89.7 EOPS 3165 (DSP F- 5)84821975-118A2025 Feb 1735580 x 35869 km, 1432.9 min, 3°.5
88.4 EUSA 233 (Wideband Global SATCOM 4)380702012-003A2025 Feb 1735784 x 35789 km, 1436.1 min, 0°.0
87.4 EUSA 176 (DSP F-22)281582004-004A2025 Feb 1735781 x 35791 km, 1436.1 min, 11°.4
83.7 EUSA 37 (Chalet 6)199761989-035A2022 Aug 2331806 x 39768 km, 1436.1 min, 7°.8
82.1 EUSA 250 (SIGINT?)396522014-020A2022 Sep 2135755 x 35819 km, 1436.1 min, 2°.2
75.4 EUSA 174 (UFO F-11)281172003-057A2025 Feb 1735770 x 35802 km, 1436.1 min, 8°.5
75.0 EMUOS 4 (Mobile User Objective System 4)408872015-044A2025 Feb 1735546 x 36027 km, 1436.1 min, 3°.5
74.1 EOPS 6063 (Rhyolite 2)63801973-013A2025 Feb 1735728 x 35847 km, 1436.1 min, 1°.6
67.7 EUSA 171 (Mentor 3, Advanced Orion 3)279372003-041A2022 Sep 2035617 x 35958 km, 1436.1 min, 12°.7
65.7 EUSA 230 (SBIRS GEO 1)374812011-019A2025 Feb 1735776 x 35796 km, 1436.1 min, 3°.5
64.8 EOPS 5346 (Rhyolite 1)44181970-046A2021 Jun 135746 x 35832 km, 1436.2 min, 2°.5
60.3 EUSA 291 (Wideband Global SATCOM 10)440712019-014A2025 Feb 1735785 x 35788 km, 1436.1 min, 0°.0
57.5 EUSA 204 (Wideband Global SATCOM 2)347132009-017A2025 Feb 1735787 x 35788 km, 1436.1 min, 0°.0
55.8 EUSA 311 (Mentor 8, Advanced Orion 8)472372019-095A2025 Feb 335607 x 35968 km, 1436.1 min, 4°.4
51.5 EUSA 118 (Mercury 2)238551996-026A2025 Jan 2934275 x 37299 km, 1436.1 min, 8°.2
51.1 EUSA 237 (Mentor 6, Advanced Orion 6)385282012-034A2025 Jan 2935649 x 35926 km, 1436.1 min, 6°.1
45.3 EUSA 138 (UFO F-8)252581998-016A2025 Feb 1735721 x 35790 km, 1434.5 min, 10°.5
44.1 EUSA 202 (Mentor 4, Advanced Orion 4)334902009-001A2025 Jan 2935732 x 35843 km, 1436.1 min, 8°.0
43.7 EUSA 104 (UFO F-3)231321994-035A2025 Feb 1735797 x 35833 km, 1437.5 min, 12°.2
40.7 EUSA 105 (Mercury 1)232231994-054A2025 Jan 2935666 x 35908 km, 1436.1 min, 13°.1
29.9 EUSA 214 (AEHF 1)368682010-039A2025 Feb 1735770 x 35803 km, 1436.1 min, 7°.0
28.6 EUSA 95 (UFO F-2)227871993-056A2025 Feb 1735772 x 35801 km, 1436.1 min, 11°.7
24.6 EUSA 325 (GSSAP 6)512812022-006B2025 Feb 135748 x 35757 km, 1434.4 min, 0°.3
24.1 EUSA 170 (DSCS III F-14)278752003-040A2025 Feb 1735778 x 35794 km, 1436.1 min, 9°.5
22.7 EUSA 207 (PAN)358152009-047A2025 Feb 335737 x 35842 km, 1436.2 min, 0°.1
20.9 EUSA 315 (SBIRS GEO 5)486182021-042A2025 Feb 1735776 x 35797 km, 1436.1 min, 5°.8
18.9 EUSA 164 (Milstar 5)271682002-001A2025 Feb 1735364 x 36207 km, 1436.0 min, 10°.6
18.8 EUSA 197 (DSP F-23)322872007-054A2025 Feb 335750 x 35799 km, 1435.5 min, 9°.8
10.4 EOPS 4966 (Canyon 6, AFP-827 6)79631975-055A2020 Jan 1930029 x 41530 km, 1435.7 min, 16°.2

For the satellites that do not have formal published elements, thanks go to the radio and visual amateur satellite trackers for their observing, and particularly to Mike McCants for archiving the derived orbits.

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