2003-027A
Mars Exploration Rover-2 "Spirit".
Mass 150 kg. Launch 2003 May 22. Landing 2004 Jan 2.
Spirit launched with targeted B-plane (104184, 235634) km and achieved (292891,407923) with TCA 2004 Jan 6, 2317 UTC.
The landing sites for the Mars Exploration Rovers: the centers of the target ellipses are 14.640S, 184.702W in Gusev Crater and 2.060S 5.992W in Meridiani Planum (according to JPL; another source gives 14.64S 184.94W and 2.06S 6.23W).
Actual landing site 14.5692S 175.4729E, i.e. approx 184.5W
AIAA2004-4980 quotes actual as 14.57189S 175.47848E.
Cruise stage: 2.65m dia, 1.6m high; based on MPF. 193 kg dry plus 50 kg prop.
Backshell and parachute are 209 kg. Heatshield is 78 kg. Each around 2.6m dia 1.5 tall?
Lander is 348 kg not including Rover. but including airbags.
Rover is 1.4m long and 1.0m wide, mass 185 kg. Box + 6 wheels + panel + booms.
During approach to the atmosphere the gas generator heaters were running hot.
The lander platform was named Columbia Memorial Station on Jan 6. Landing site was 14.571892S 175.47848W.
On Jan 21 Spirit stopped communicating with Earth and went into a cycle of repeated computer reboots when its flash memory file system filled up. The software problem was eventually fixed by controllers and Spirit resumed operations on Jan 31.
Mars Re is 3397.5 km; landing site is at -5.2 km; entry at 124.7 km, Vi 5.628 km/s with theta = -11.4949 at az 70.925207 over 17.7420S 161.7765E. Entry mass was 827 kg including 90 kg heatshield; 14.1m parachute diameter.
Mass breakdown:
| PK | Older data | ||
| Rover | 174 kg | 185 | |
| Lander | 365 kg | 348 | |
| RAD x 3 | 15 kg | ) | |
| RAD prop | 37 kg | ) | |
| Backshell | 146 kg | )209 | + parachute |
| Heatshield | 90 kg | 78 | |
| Cruise | 183 kg | 193 | |
| Prop | 52 kg | 50 | |
| Total | 1062 kg | 1063 | |
| Payload adapter | |||
| PAM/Star 48 full | 2213 | 2134 motor | |
| PAM/Star 48 empty | 191 | 111 motor | |
Three RAD - rocket assisted decleration, Star 8. Star 8 TE-M-1076-1 is 0.69m long 0.20m dia with 33 kNs impulse, 7.5kN for 4.3s at 272.9 eff Isp and 17.4 kg full 5.1kg dry.
Three TIRS - Tranverse Impulse Rocket System (Star 3, TE-M-1082-1) with 1 kg full 0.5kg prop.
ATK 0.20m dia 0.69m long 17 kg mass, 4.3s burn. TP-H-3062 CTPB prop. Enhanced derivative of MPF RAD. Impulse 31 kNs. Thrust 7.3 kN.
TIRS - transverse impulse rocket system
ATK 0.08m dia 0.29m long 1.2 kg, 0.62s burn.
| Rover A | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2003 Jun 10 | 1758:47 | Launch by Delta 7925-9.5 | CC SLC17A |
| T+1:03 SRM 1-6 off | |||
| T+1:05 SRM 7-9 on | |||
| T+1:06 SRM sep 1-6 | |||
| T+2:11 SRM sep 7-9 | |||
| T+4:23 MECO | |||
| T+4:31 St 1 sep | |||
| 1803:24 | T+4:37 SES-1 | -3400 x 120 | |
| 1803:29 | T+4:42 Fairing sep | -3390 x 120 | |
| 1808:15 | T+9:38 SECO-1 | 160 x 180 x 28.5 | |
| 1825:15 | T+26:28 SES-2 | ||
| 1827:21 | T+28:34 SECO-2 | 163 x 4762 x 28.5 | |
| 1828:14 | T+29:27 St 2 sep | ||
| 1828:51 | T+30:04 TES 90s over 18E 20S ? 200 km? | ||
| 1830:19 | T+31:32 TECO C3= 9.2510 at 182 km | ||
| 1835:01 | T+36:14 Yo-yo despin released | ||
| 1835:06 | T+36:19 Star 48 sep | 182 x -99113 x 28.50 | |
| 2030? | SES-3 | ||
| SECO-3 | 162 x 4619 x 25.7 | ||
| Injection C3 = 8.822 RLA,DLA = 347.35, -2.32 | 184 x -103070 x 28.46 | ||
| 2003 Jun 11 | 0347 | Pass EL1:4 | |
| 2003 Jun 16 | 0127 | Depart Earth sphere 1.5Mkm | |
| 2003 Jun 20 | 1700 | TCM-A1 axial 28min; range 2.66Mkm | |
| TCM-A1 perpendicular 22 min; total | |||
| Total 16.5m/s (or 14.3m/s?) | |||
| 2003 Aug 1 | 1800 | TCM-A2 6m/s 9m; Gusev targeting | |
| 2003 Nov 14 | 1830 | TCM-3 0.6m/s 132s | |
| 2003 Nov | T-45d Approach phase | ||
| 2003 Dec 27 | 0200 | TCM-A4 3.4s 0.03m/s | |
| 2003 Dec 30 | 1545? | Enter Mars sphere 1.08Mkm | |
| |||
| 2004 Jan 4 | |||
| 0255 | Turn to entry, heat shield forward | ||
| 0311 | Turn complete | ||
| 0326 | Alt 10600 km at 3.4 km/s | ||
| 0345 | Coolant venting | ||
| 0401 | 3200 km, 4.23 km/s | ||
| 0404:52 | E-15:00 Cruise Stage sep | 15 x Inf | |
| 0408 | 2000 km | ||
| E-3.0min 465 km 5.202 km/s 1731 km uprange | |||
| E-2.5min 354 km alt | |||
| E-2.0min 298 km alt | |||
| E-1.5min 245 km | |||
| E-1.0min 195 km 5.401 km/s | |||
| 73 12192 437 | 0419:52 | E-0 Entry at 128 km, 75 deg az, 5.4km/s/rel, -12 deg rel (-11.5 in.) | |
| Postflight: Entry 5.63 km/s -11.5 deg | 13 x -18404 | ||
| 117 km 5.449 km/s 703 km range | |||
| E+60s 74 km 5.4415 km/s | |||
| E+102s Peak heating | |||
| 0423:05 | E+240s (actual was later) para deploy | ||
| E+251s (actual) para deploy | ||
| 0424:15 | E+271s Heatshield sep | ||
| 0424:25 | E+272s Backshell release | |
| E+282s Bridle descent complete | |||
| E+311s 34 km, radar on | |||
| E+339s Airbags inflate | |||
| 0425:42 | E+339s RAD/TIRS rockets fire at 115m | ||
| RAD dV = 315 m/s at 100m alt. Three RAD, 4s burn, 10 kN? | |||
| 0425:44 | E+348s Bridle cut (backshell sep) at 8m | ||
| 0425:48 | E+350s Landing at Gusev at 24 m/s | ||
| Bounces 57s to 100m? | |||
| 28 impacts for 300 m | |||
| 0436 | Landing complete | ||
| 0444:09 | Antenna tone | ||
| 0447 | Airbags retract L+66m | ||
| 0521 | Airbag retraction stops | ||
| 0521? | Petals open L+187m | ||
| 2004 Jan 5 | HGA deployed | ||
| 2004 Jan 6 | 2317 | PAM-D pass Mars at 502000 km | |
| 2004 Jan 8 | Airbag retraction continues | ||
| 2004 Jan 9 | Front wheel deploy | ||
| 2004 Jan 10 | Standup sequence complete | ||
| 2004 Jan 15 | 0821:30 | Move command transmitted | |
| 0840 | Rover move off lander by 3m | ||
| 0841 | Rover move complete | ||
| 2004 Jan 18 | Move to Adirondack rock | ||
| 2009 May 7 | Stuck at Home Plate | ||
| 2010 Jan 26 | Attempts to free from Home Plate abandoned | ||
| 2010 Mar 30 | LOS for Martian winter | ||
Payload:
- Pathfinder landing system, airbags
- Pancam Panoramic camera
- Mini-TES Miniature Thermal Emission Spectrometer
- Mossbauer Spectrometer (on arm)
- APEX Alpha proton X-ray spectrometer (on arm)
- Microscopic imager (on arm)
- RAT Rock Abrasion Tool (on arm)
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