JIRAM mirror issues |
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JIRAM mirror issues |
 Sep 3 2023, 11:20 AM
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#1
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Member  Group: Members Posts: 238 Joined: 28-October 12 Member No.: 6732  |
QUOTE (volcanopele @ Sep 1 2023, 06:55 PM)  ... and the stuck mirror basically makes the spectrometer not all that useful even for the wavelength span it CAN do... The de-spinning mirror of JIRAM is sticking!? When did this happen? |
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Sep 4 2023, 02:12 AM
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#2
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 Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
PJ44. Meant that JIRAM missed Europa during last year's flyby. Io data is smeared in PJ47 and PJ44.
EDIT: I should note that the imager data from JIRAM is still quite usable. Our measurements of hotspot intensity from PJ47 weren't affected by the smear. The spectrometer data might not be of much use though.... -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Sep 6 2023, 09:12 PM
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#3
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
QUOTE (bobik @ Sep 3 2023, 04:20 AM) The de-spinning mirror of JIRAM is sticking!? When did this happen? I can neither confirm nor deny anything about this. FWIW, I amused myself for a couple of hours going through the JIRAM PDS archive to see if I could tell anything using public info. It certainly isn't something that's emphasized or even mentioned in the archive that I saw. It might be possible to figure it out by looking at the binary engineering files that have mirror state information, but I ran out of gas before getting that far. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Sep 7 2023, 02:25 AM
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#4
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
You’re clear Mike. Scott Bolton brought it up at OPAG a few months back. The only public info is that the spin-compensation mirror is stuck and has been since PJ44. I have no knowledge beyond the fact that the publicly released JIRAM image from PJ49 was also smeared like PJ47.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Sep 8 2023, 05:59 AM
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#5
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Member Group: Members Posts: 238 Joined: 28-October 12 Member No.: 6732 |
QUOTE (volcanopele @ Sep 7 2023, 02:25 AM) Scott Bolton brought it up at OPAG a few months back. The only public info is that the spin-compensation mirror is stuck... Yeah, the recording can be found here. But it may take some time to get detailed information. Embargoed until October 26, 2100! 
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Sep 11 2023, 09:50 PM
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#6
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 Member Group: Members Posts: 444 Joined: 1-July 05 From: New York City Member No.: 424 |
I trust that "2100" is a typo of some kind?
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