Mro On Approach, TCM-3 not required |
Mro On Approach, TCM-3 not required |
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#1
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![]() Member ![]() ![]() ![]() Group: Members Posts: 134 Joined: 13-March 05 Member No.: 191 ![]() |
MRO has shifted from the cruise phase to Approach phase. Apparently, the trajectory is so good that TCM-3 was cancelled. This is good news for the prospects for a long life for MRO supporting future missions. TCM-4 is on Feb 28, and MOI on March 10. Only 5 weeks away!
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#2
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Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 ![]() |
Being VERY unscientific, approx speed at periareion using Orbiter with these apareion's....
10000km - 4330 m/sec 18000km - 4460 m/sec 28000km - 4590 m/sec 38000km - 4650 m/sec 45000km - 4670 m/sec So to vary between 28000 and 45000 is only a 80ish m/sec difference, in an MOI burn of I believe roughly 1000 m/sec over 25 minutes - so +/- 40m/sec is about a 4% error, or 1 minute of the burn 200 x 400km orbit is approx 3520 - 3320 m/sec ish -so aerobraking is giving us another 1000 m/sec of delta V. All figures very VERY roughly done in orbiter. Doug |
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#3
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2488 Joined: 17-April 05 From: Glasgow, Scotland, UK Member No.: 239 ![]() |
The way I see it, almost *any* orbit is better than an unplanned landing mission. And I was, originally, really trying *not* to be cruel about the MCO trajectory, honest! I didn't *need* to be cruel, not with you lot aboard...
Bob Shaw -------------------- Remember: Time Flies like the wind - but Fruit Flies like bananas!
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Guest_AlexBlackwell_* |
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#4
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