MAX-C/ExoMars, Dual NASA/ESA rovers slated for 2018 launch |
MAX-C/ExoMars, Dual NASA/ESA rovers slated for 2018 launch |
Mar 18 2010, 08:25 AM
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Member Group: Members Posts: 239 Joined: 18-December 07 From: New York Member No.: 3982 |
In case anyone doesn't know the 22nd MEPAG meeting is going on March 17th and 18th.
On the presentations posted for the first day there is one titled "Mars Sample Return (three element architecture)." On the 5th slide it states that during to the "Team X" study, the aeroshell was increased in diameter from 4.5m to 4.7m in order to accommodate both MAX-C and ExoMars together. I took a look at the specifications for the Atlas 5 launch vehicle and found on page 6-4 and 6-21 that the maximum diameter of the payload bay was 4.572m. Is it possible to fit a 4.7m aeroshell in a 4.572m payload bay? I know this mission is still in the early planning stage and that these numbers should be taken with a huge grain of salt; but this looks like a pretty big oversight. |
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Apr 23 2011, 02:19 AM
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Member Group: Members Posts: 239 Joined: 18-December 07 From: New York Member No.: 3982 |
I think I might have gotten lost in all the numbers. Let me know where I went wrong.
There was an original mission concept study that was presented to the decadal that estimated the NASA share of the total cost to be $2.2B. The decadal committee had a CATE study done that estimated the NASA share of the costs to be $3.5B. This was deemed too large a portion of the total budget so they performed second “descoped” CATE study where they joined the two rovers together and came up with a NASA cost of $2.4B. Now there saying that NASA’s contribution will only be about $1.2B. It ultimately comes down to what they estimated the ESA costs to be in all these studies. Considering this was a joint mission from the beginning we can assume that it was not zero. |
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