Apollo Sites from LRO |
Apollo Sites from LRO |
Jul 17 2009, 02:52 PM
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
Thought this deserved a new thread- we can't talk about EVERY LRO target in the one thread
I made a mistake in this one - I didn't include the thruster plume guards. My MER/MPF simulation for HiRISE seemed to come out about right - so fingers crossed that this will be there or there abouts as well. Still in a comissioning phase, something of a slant angle - I'd expect approx 1.5m/pixel if it's at the 120km figure mentioned earlier. |
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Jul 23 2009, 12:42 AM
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Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
When landing *anything* on what is essentially a horizontal flight profile for all but the last 100 feet, manned or unmanned, it is always easier to land long. Stopping short means taking out more of your horizontal velocity than planned, more quickly and higher than planned. That maneuver inevitably ends up costing more in fuel than any of the alternatives for steering away from your targeted site. Landing long costs you a little less fuel, and gives you more time to find an acceptable site.
I'm hoping that this kind of thinking is being applied to automated landing systems -- you don't always have a parachute system to kill your horizontal velocity, after all. -the other Doug -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Jul 23 2009, 02:19 AM
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Senior Member Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
More fundamentally, Armstrong later said "I was just absolutely adamant about my God-given right to be wishy-washy about where I was going to land."
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