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Unmanned Spaceflight.com _ Phoenix _ Photo while landing
Posted by: tuvas May 21 2008, 06:55 PM
Just found this space.com blog entry, sounds interesting.
http://www.livescience.com/blogs/author/leonarddavid/
The MRO project has been investigating the possibility of imaging the Phoenix Mars lander during its entry, descent and landing period - as the probe plunges toward the red planet’s arctic region.
MRO would use its High Resolution Imaging Science Experiment (HiRISE) gear in attempting to catch the Phoenix in action as it high-dives to its touchdown site.
“The attempt requires that Phoenix be in the HiRISE field of view at the very moment that it temporarily crosses Phoenix’s path,” James Erickson, MRO Project Manager at the Jet Propulsion Laboratory told me.
There's more, but this should be enough to wet your appetite.
Posted by: volcanopele May 21 2008, 06:59 PM
Wow, that secret lasted long...
Posted by: tuvas May 21 2008, 07:02 PM
Yah, that went pretty quick. It's been on the blog for a few days now.
I just don't understand why they don't use CTX, it's far more likely to find something, even if it is beyond it's resolution. But, well, I'm sure there's a reason... Sufficeth to say, I might have to use my old contacts to see if they succeeded on Monday morning...
Posted by: volcanopele May 21 2008, 07:11 PM
yeah, there is about a 30% chance of success. So cross your fingers.
That was on the blog for several days?? I was told about two days ago and was told, specifically, to keep my mouth shut about it (by two people).
Posted by: tuvas May 22 2008, 12:49 AM
May 19th, 2008
So, well, yes. LOL. There is advantages to having formerly worked at HiROC, but not still there... I have access to the same things as everyone else. James Erickson stated 20% chance in the blog entry.
Posted by: climber May 23 2008, 03:47 AM
From Phoenix blog (JPL) : Hence estimates suggest that there may only be a 25% chance that we can capture an image of Phoenix during the parachute phase.
Posted by: djellison May 23 2008, 07:49 AM
When I read about HiRISE trying to get it - I thought "That might be cool - an entry plasma trail". Then when I was putting together an entry timeline for reference on sunday night, I realized 'hold on - that's when the chute is out...I must have this wrong'
I don't.
Cool 
Doug
Posted by: edstrick May 23 2008, 08:11 AM
It they do catch it during parachute descent, the chute will be large, round, and not dirty! SHOULD stick out like a sore thumb.
Posted by: ugordan May 23 2008, 09:28 AM
Wasn't MEX the one that was supposed to try and catch the entry fireball?
Posted by: djellison May 23 2008, 09:33 AM
Yes. But between finding out that HiRISE was going to be imaging, and finding out it was going to be imaging after 'chute deployment, I assumed HiRISE would be fireball hunting as well.
Doug
Posted by: edstrick May 23 2008, 09:35 AM
I think MEX was trying to observe it, according to reports about a week ago. I don't know how reliable the reports are, off the top of my head.
Posted by: climber May 23 2008, 11:03 AM
From ESA : Observations before and during Phoenix descent
It is planned that two Mars Express instruments, the High Resolution Stereo Camera (HRSC) and the Ultraviolet and Infrared Atmospheric Spectrometer (SPICAM), will be turned on for observations during the Phoenix EDL.
The observations are aimed at visually capturing the trail of the lander's trajectory to the Martian surface, studying the characteristics of the atmosphere during the lander's descent, and monitoring the lander's performance during EDL.
It is not possible to know the exact route Phoenix will take when descending to the surface, and so it is possible that the instruments may not be looking in the correct direction during the event. This makes the likelihood of success less than certain.
Posted by: Skyrunner May 23 2008, 12:11 PM
So possibly we get a repeat of those stunning launch photographs And having two SCs increases the odds, even thought there looking at the same nominal trajectory, since the have different observation angles.
Man I'm getting nervous! I'm even going to interrupt my diet with a bag of peanuts 
Posted by: Stu May 23 2008, 01:33 PM
I'll look forward to seeing those ESA images... should be released shortly before the Sun enters its red giant phase... 
Posted by: simonbp May 23 2008, 02:06 PM
The press release shows MO lined up too, but I haven't seen it mentioned anywhere that THEMIS will be imaging entry (probably beyond resolution), so presumably it's just there as a relay?
Simon 
Posted by: djellison May 23 2008, 02:09 PM
I think Odyssey needs to be in knuckle-down-and-do-nothing-else bent-pipe relay mode
Doug
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