2001-027A
The Microwave Anisotropy Probe is a MIDEX mission launched by Delta 7425-10 to the Earth-Sun L2 point. 3 month transit to L2 with lunar flybys.
The satellite observes from 22 to 90 GHz with a resolution of 13-55 arcmin. Mass 837 kg full, incuding 72 kg prop.
Box 3.8 h 2.0w? 5.0 span with a circular deployable solar array/thermal shield panel. GSFC mission and GSFC-built spacecraft. The instrument was built in collaboration with Princeton.
A slight SES-1 overburn was required to achieve the desired parking orbit.
In Feb 2003 MAP was renamed WMAP, the Wilkinson Microwave Anisotropy Probe, after David T. Wilkinson (1935-2002), one of the leaders of the COBE and MAP satellite programs. The WMAP team announced their preliminary results at the same time, with values of the Hubble Constant, the age of the universe, the breakdown of baryonic matter, dark matter and dark energy, and the first measurement of the time of reionization.
Close passes (less than 10 million km) to the Earth are predicted in Apr 2025 and Nov 2039.
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| MAP |
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| Date | Time | Event | Orbit |
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| 2001 Jun 30 | 1946:46 | Launch by Delta 7425-10 | CC SLC17B |
| | | T+1:03 SRM 1-4 burnout |
| | | T+1:08 SRM 1-4 sep 22 km | -6320 x 28 ? |
| | | T+4:24 MECO |
| | | T+4:30 Stage 1 sep |
| | | T+4:37 SES-1 113 km | -4470 x 160 ? |
| | | T+4:58 Fairing sep 125 km 5.4 km/s | -4400 x 160 ? |
| | | T+5:48 | -4189 x 159 |
| | | T+7:52 | -3426 x 167 |
| | | T+10:16 | -1767 x 170 |
| | | T+10:30 | -1482 x 170 |
| | | T+10:58 | -926 x 169 |
| | | T+11:08 | -741 x 169 |
| | | T+11:24 | -370 x 169 |
| | 1958:29 | T+11:43 SECO-1 (7s late) | 167 x 204 x 28.75 |
| | 2004 | Solar array deploy |
| | 2104:29 | T+1:17:43 SES-2 |
| | 2104:33 | T+1:17:47 SECO-2 | 181 x 308 x 28.8 |
| | 2105:26 | T+1:18:40 Stage 2 sep |
| | 2108:03 | T+1:19:17 TES |
| | 2108:31 | T+1:20:45 TECO |
| | 2112:13 | T+1:25:27 Yo-yo despin |
| | 2112:18 | T+1:25:32 Stage 3 sep | 182 x 290991 |
| | 2127s | SES-3 depletion | 201 x 325 x 26.9 |
| 2001 Jun 30 | | | 181 x 289038 x 28.7 |
| 2001 Jul 1 | | | 182 x 292492 x 28.7 |
| | 1308 | Pass EL1:4 |
| 2001 Jul 2 | | Apogee 1 |
| 2001 Jul 3 | 2214 | Pass 96479 km from the Moon |
| 2001 Jul 4 | 1322 | A1 Cal burn, 0.8kg 105s 1.9m/s | 1017 x 299475 x 28.7 |
| 2001 Jul 7 | | Delta stage 2 reentry |
| 2001 Jul 8 | 0433 | Perigee 1 burn TCM 1275s 20.2m/s |
| 2001 Jul 8 | | | 3100 x 347000 x 28.3 |
| 2001 Jul 12 | 1611 | A2 cal burn 40s 0.2m/s at 347891 km |
| 2001 Jul 17 | 0336 | Perigee 2, TCM 176s 2.5m/s at 2955 km |
| 2001 Jul 18 | | | 3002 x 354103 x 28.3 |
| 2001 Jul 21 | 1854 | A3 cal burn 40s 0.3m/s 356012 km |
| 2001 Jul 25 | | | 4720 x 355851 x 28.8 |
| 2001 Jul 26 | 1229 | Perigee 3, TCM 546s 7.4m/s 4741km |
| 2001 Jul 27 | 0430 | P3C, TCM 23.8s 0.3m/s at 158306 km |
| 2001 Jul 29 | 2011 | Enter Lunar sphere |
| 2001 Jul 30 | 1637 | Lunar flyby 5279 km |
| 2001 Jul 31 | 1257 | Depart Lunar sphere |
| 2001 Aug 1 | | | 182832 x 1178307 x 28.1 |
| 2001 Aug 6 | 1637 | MCC1 17.8s 0.1m/s at 755736 km |
| 2001 Aug 9 | | Begin science data collection |
| 2001 Aug 13 | | | 213681 x 1175513 x 28.1 |
| 2001 Aug 21 | | | 203451 x 1262240 x 29.25 |
| 2001 Aug 26 | | Within 1.2Mkm |
| 2001 Aug 28 | | | 239618 x 1333433 x 30.85 |
| 2001 Sep 14 | 1551 | MCC2 6.6s 0.04m/s at 1402107 km |
| 2001 Sep 29 | | | 270609 x 1468691 x 40.28 |
| 2001 Oct 1 | | Arrive L2 |
| 2001 Oct 10 | | | 258144 x 1479888 x 42.22 |
| 2001 Nov 2 | | | 306445 x 1495753 x 38.15 |
| 2001 Dec 13 | | | 327623 x 1453870 x 30.87 |
| 2002 Jan 4 | | | 418706 x 1444582 x 32.19 |
| 2002 Jan 8 | | | 385538 x 1440816 x 32.80 |
| 2002 Jan 15 | | | 357519 x 1441727 x 33.02 |
| 2002 Jan 16 | 1650 | SK1 72s 0.4m/s |
| 2002 May 8 | 1603 | SK2 53s 0.34m/s |
| 2002 Jul 30 | 1638 | SK3 72s 0.5m/s |
| 2002 Nov 5 | 1921 | SK4 96s 0.56m/s |
| 2003 Mar 12 | 1350 | SK5 50s 0.3m/s |
| 2003 Nov 12 | 1511 | SK6 42s 0.25m/s |
| 2004 Mar 9 | 1524 | SK7 112s 0.66m/s |
| 2010 Aug 14 | | end of science ops |
| 2010 Aug 19 | | end of calibration ops |
| 2010 Sep 8 | | To heliocentric orbit , 20 min burn |
| 2010 Sep 30 | 1540 | Departure burn |
| | 1640:55 | End burn |
| 2010 Oct 19 | 2020 | Begin final burn |
| | 2124 | Complete burn, 27.7m/s |
| 2012 Jan | | | 1.002 x 1.090 AU x 0.15 |
| 2013 Jan | | | 1.001 x 1.085 AU x 0.15 |
Payload:
- Dual Gregorian 1.4 x 1.6m reflectors
- Differential microwave radiometers 22, 30, 40, 60 and 90 GHz