1998-029A
USA 139 was launched by a Titan 4B/Centaur with an 86-foot fairing. Launch vehicle was core K-25, Titan 4B-25, with upper stage Centaur TC-18. The UN registration gave the initial parking orbit.
From at least 2003 to 2009, the satellite performed the Thuraya 2 shadowing duty, until it was replaced by USA 202. It then drifted to perform an emitter survey until 2010 when it was located at 14.5W over the Atlantic; in 2011 this was adjusted to 26W.
| USA 139 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1998 May 9 | 0138:01 | Launch by Titan 4B Centaur | CC LC40 |
| 0140 | SRM sep | ||
| 0143 | Stage 1 sep | ||
| 0147 | Titan stage 2 sep | ||
| 0147 | Centaur MES1 | ||
| 0150 | Centaur MECO1 | 91.8 172 x 551 x 28.6 (UN) | |
| 0201? | Centaur MES2 | ||
| 0206? | Centaur MECO2 | 550 x 35780 x 28? | |
| 0719? | Centaur MES3 | ||
| 0721? | Centaur MECO3 | 1436? 35780 x 35780 x 0? | |
| 0725? | Centaur sep | ||
| 0730? | Centaur venting observed | ||
| 2003 Mar 9 | 1436.11 35637 x 35935 x 7.0 GEO 44.0E | ||
| 2009 Jul 20 | 1436.12 35564 x 36009 x 7.9 GEO 43.9E | ||
| 2009 Aug 22 | Move out | ||
| 2010 Feb 24 | Move in | 1436.12 35651 x 35922 x 82.2 GEO 14.5W | |
| 2011 Mar 3 | 1436.12 35664 x 35909 x 8.4 GEO 14.5W | ||
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