1969-069A
ATS E (Applications Technology Satellite 5) was the third successful ATS. Launch by Atlas Centaur was at 1101 UT on 1969 Aug 12. Because of its heavier mass, ATS-5 needed a more elliptical parking orbit and a shorter coast time. The satellite was inserted into geostationary transfer orbit and fired its SR-28-3 apogee motor (serial number was either Z-4 or Z-6). The AKM was fired at first apogee instead of the planned second because of an attitude control anomaly. The apogee motor was to have been ejected 90s later to improve stability characteristics, but the spacecraft went into a flat spin and the ejection was aborted. ATS 5 was allowed to drift into view of the Rosman ground control station, and was maneuvered so that the spin was around the correct axis, but upside down. The motor was jettisoned on Sep 5. It impacted the solar array during ejection and caused minor damage. Because ATS-5 was spinning in the wrong direction, the yo-yo system could not be used and the gravity gradient booms could not be deployed. The spacecraft remained at 105 deg W until 1978 when it was moved to 70W; in 1984 it ran out of stationkeeping fuel and was moved off station. Its orbit was raised sometime in the months following Apr 1984.
| ATS 5 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1969 Aug 12 | 1101:04 | Launch by Atlas Centaur | |
| T+2:32 BECO | |||
| T+2:35 Booster sep | |||
| T+3:21 panel jettison, 520 kg. | |||
| T+3:53 Fairing sep, 970 kg | |||
| T+4:10 SECO | |||
| T+4:13 Atlas sep | |||
| T+4:23 Centaur burn | |||
| 1111 | T+10:39 Centaur MECO 25 min coast | 142.80 181 x 5158 x 26.79 | |
| 1136 | T+35:43 Centaur MES2 1:11 | ||
| 1137 | T+36:54 Centaur MECO2 | 686.46 2147 x 36645 x 17.60 (Delta rpt) | |
| 1140 | T+39:09 Centaur sep | ||
| T+46:09 Centaur blowdown, pos-sep burn H2O2, 49s | |||
| T+46:58 Centaur post-sep H2O2 off | |||
| T+46:59 Centaur venting | 703.7 2187 x 37471 x 17.59 (AC) | ||
| 1150? | ATS-5 spun up to 95 rpm | ||
| 1710? | AKM 44s burn | 1463.97 35763 x 36901 x 2.7 (PLR No2) | |
| 35784 x 36908 x 2.62 | |||
| 35688 x 36809 x 2.62 (TMX-2383) | |||
| 1710 | 1416.43 34844 x 35956 x 2.7 GEO 90.5E+5.0W | ||
| 1969 Aug 12 | attitude control issues | ||
| 1969 Aug 17 | attitude control recovered | ||
| 1969 Sep 5 | AKM jettison | ||
| 1969 Sep 5 | Yo-yo despin | ||
| 1969 Oct 2 | 1435.99 35778 x 35791 x 2.6 GEO 106.6W | ||
| 1970 Aug 2 | 1436.12 35726 x 35847 x 1.7 GEO 104.9W | ||
| 1971 May 31 | 1436.22 35724 x 35853 x 1.0 GEO 105.1W | ||
| 1974 May 3 | GEO 105.4W | ||
| 1975 Sep 17 | GEO 104.9W | ||
| 1976 Mar 15 | GEO 104.9W | ||
| 1977 Jan 10 | GEO 105.4W | ||
| 1977 Feb? | Move out | ||
| 1977 Feb 18 | 1434.83 35731 x 35792 x 3.8 GEO 94.8W+0.3W/d | ||
| 1977 May | Move in | ||
| 1977 May 25 | 1435.94 35773 x 35793 x 4.0 GEO 70.3W | ||
| 1978 Oct 18 | 1436.00 35780 x 35788 x 5.0 GEO 69.4W | ||
| 1980 Feb 28 | 1436.12 35773 x 35800 x 5.9 GEO 69.8W | ||
| 1982 Jul 12 | 1435.98 35774 x 35794 x 7.3 GEO 68.8W | ||
| 1982 Nov 19 | Drift | 1436.16 35774 x 35800 x 7.6 GEO 69.7W+0.02 | |
| 1983 Jan 11 | 1435.90 35775 x 35789 x 7.7 GEO 70.1W+0.04 | ||
| 1983 Feb 9 | Move out | 1435.45 35755 x 35792 x 7.7 GEO 61.3W+0.15W | |
| 1983 Mar 13 | Move in | 1435.76 35751 x 35808 x 7.8 GEO 53.1W | |
| 1983 Apr 27 | 1435.90 35741 x 35811 x 7.8 GEO 50.5W+0.04 | ||
| 1983 Aug? | Move out | ||
| 1983 Sep 9 | 1435.54 35727 x 35823 x 8.0 GEO 77.5W+0.1W | ||
| 1983 Nov 28 | 1435.98 35735 x 35833 x 8.2 GEO 71.4W+0.02 | ||
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