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Spirit retrospective, - a few details from my current project
cbcnasa
post Jun 11 2012, 11:18 PM
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Amazing even if it is ugly smile.gif
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Astro0
post Jun 12 2012, 05:11 AM
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Just a little side note...

Today would have marked Spirit's 3000th Sol on Mars had she still been operational sad.gif smile.gif
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fredk
post Jul 9 2012, 10:55 PM
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QUOTE (Deimos @ Jul 6 2012, 03:07 PM) *
We also got Andromeda--it was barely detectable in the largest practical exposures.
QUOTE (Deimos @ Jul 7 2012, 05:19 PM) *
I believe it was A/1941, night time opacity field A (aka the "diffuse sensitivity test").

(I hope Phil doesn't mind me using his thread to do some Spirit retrospection - this definitely doesn't belong in the Oppy thread where those quotes come from.)

Thanks for digging that up, Deimos. "Barely detectable" is a good description! With some effort I was able to squeeze the Andromeda Galaxy/M31 out of the 1941 pics. If anyone wants to try this at home, here are the details: I used these two frames:
2P298641880EFFB1E5P2731L1M1.JPG (frame 1)
2P298642075EFFB1E5P2731L1M1.JPG (frame 2)
I added 256 to the frame 2 values, then subtracted frame 1. The result was stretched and smoothed. (Strangely, the PDS RAD images show less detail than the jpl jpegs.)

The result is that most of the frame averages to neutral grey. Any real object (eg a star) will appear as a lighter-than-neutral-grey streak adjacent to a darker streak, which stands out very well. I've identified M31 in this crop:
Attached Image

It's clearly fuzzier than the stars, and it is exactly where it should be, as you can see from this flicker gif comparing the difference image with a star chart:
Attached Image

Extragalactic imaging from Mars! pancam.gif
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Phil Stooke
post Jul 9 2012, 11:45 PM
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It's not my thread! It belongs to all of us. Thanks for this - very nice.

Phil



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... because the Solar System ain't gonna map itself.
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CosmicRocker
post Jul 11 2012, 04:33 AM
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Yes, very nice work, Fred. Thanks. smile.gif


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...Tom (thinks he should use more emoticons)
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Phil Stooke
post Mar 8 2013, 10:34 PM
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Here's a text file containing descriptions of Spirit's activities for every sol of the mission. It is just the data from the PDS Analyst's Notebook mission summary, but in a different file format, in case anyone may find it useful.

Attached File  spirit_activities_by_sol.txt ( 104.38K ) Number of downloads: 58



Phil


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... because the Solar System ain't gonna map itself.
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vikingmars
post Mar 22 2013, 12:37 PM
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Thanks a lot Phil : yes very useful. I'll compare it with my own log smile.gif
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