Lost landers from HiRISE, The next step |
Lost landers from HiRISE, The next step |
Jan 3 2007, 08:41 PM
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Member Group: Members Posts: 428 Joined: 21-August 06 From: Northern Virginia Member No.: 1062 |
Okay, we now have definitive pictures of VL1, 2, Spirit, Opportunity, and a Pathfinder coming up soon. So, now, what would the lost landers look like, starting with Beagle, MPL, and Mars 6, which will be the easiest to find of the landers. Just curious to hear your thoughts. Thanks!
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Feb 21 2012, 06:41 PM
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Member Group: Members Posts: 808 Joined: 10-October 06 From: Maynard Mass USA Member No.: 1241 |
That Soviet movie was very cool. Here are some of the essentials I have gleaned over the years...
MARS 3 Main parts * Lander = 1.2 meter spherical, with 4 petals to right itself * Aero/Heat shield = 2.9 meter, (more conical, than rounded- there is no back shell) * Braking parachute * Main parachute * Retro rockets MARS 3 EDL Sequence 09:14 UT (2/DEC/71) Mars 3 separated from the orbiter 09:30 UT - Engines were fire to re-orient the spacecraft (aeroshield forward) 13:47 UT - Entry into the Martian atmosphere at 5.7 km/sec; at an angle less than 10 degrees. (unknown time) - The braking parachute was deployed (unk time) – Main chute was deployed which was ‘reefed’ until the craft dropped below supersonic velocity, at which time it was fully deployed. (unk time) – The aero/heat shield was ejected, and the radar altimeter was turned on. Mars 3 is going in head first (altimeter is on the top of the craft) (unk time) - At an altitude of 20 to 30 meters at a velocity of 60 - 110 m/s the parachute is released with retrorockets, bring it off to the side, the main retrorockets continue to fire. The lander is released to drop to the surface. The retros carry the remainder of the EDL framework away (remind anyone of MSL?) 13:50:35 UT - Mars 3 ‘landed’ at the surface at a reported 20.7 m/s (ouch!); approx 45S, 158W . (unk time) - The four petal-shaped covers open to right the lander 13:52:05 UT –The lander starts transmitting to the Mars 3 orbiter. 13:52:25 UT - The surface transmissions stop. What should be left: Aeroshield/Heatshield (size: 2.9 meters, within 500 meters of lander?) Main parachute with spent retrorocket (unknown size; within 150 meters of the lander?) EDL framework with spent retrorockets (size: <2 meters, within 100 meters of the lander) Lander (1.2 meter sphere, white, 4 petals protruding) (...or some jumbled up mess of lander and chutes....) -------------------- CLA CLL
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