Here's Looking At You, Kid, MGS Sees Mars Odyssey and Mars Express |
Here's Looking At You, Kid, MGS Sees Mars Odyssey and Mars Express |
May 19 2005, 07:39 PM
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Senior Member Group: Members Posts: 1281 Joined: 18-December 04 From: San Diego, CA Member No.: 124 |
-------------------- Lyford Rome
"Zis is not nuts, zis is super-nuts!" Mathematician Richard Courant on viewing an Orion test |
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May 21 2005, 02:52 AM
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
The 1971 Soviet Mars missions included a cosmos <stranded in earth orbit or something>, Mars-2 and Mars-3. I believe the Cosmos was an orbiter only mission, trying to beat Mariner 71 orbiters there.
Mars 2 and Mars 3 deployed the landers before orbit insertion, like Mars express, then retrofired into orbit. Mars 2 lander entered too steep or something and may have burned up, while the orbiter got into a 19 day or so oribt, had attitude control failure, and was in a sun-pointing slow spin, unable to do "targeted" science. Mars 3 lander survived landing briefly, but failed with no significant science return. The orbiter worked will for a few months, but had to use up it's "shoot-develop-and-readout" film supply and couldn't wait for the end of the great 1971 global dust storm to image the surface. The 1973 Mars fleet consisted of Mars 4 and 5 orbiters and Mars 6 and 7 flyby's carrying landers (the orbits to mars were less favorable than in 71 and a full orbiter + lander was too heavy for the Proton booster) Mars 4 failed orbit insertion and did a flyby. Mars 5 made it into orbit, worked for a short period, and reportedly depressurized it's air-conditioned electronics compartment and died. Mars 6 went silent at retrofire or impact <almost the same time, as with pathfinder and the airbag rovers) Mars 7 was misdeployed and missed the planet. The Soviets didn't have the heart to try in 75. Or so it seems. They switched to Venus with a direct modification of the Mars Orbiters and had a 100% success with the Venera 9 and 10 lander/orbiter pairs. |
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