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Juno Perijove 35 - Jupiter, July 21, 2021
mcaplinger
post Jul 22 2021, 10:12 PM
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First group of images, including Ganymede, now on missionjuno. More to follow.


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Disclaimer: This post is based on public information only. Any opinions are my own.
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Floyd
post Aug 7 2021, 08:01 PM
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If grey balanced, wouldn't that counter an increase in the averaged red channel? You may see your reddening in the un-grey balanced map-projected images.


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mcaplinger
post Aug 7 2021, 08:13 PM
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QUOTE (Floyd @ Aug 7 2021, 01:01 PM) *
If grey balanced, wouldn't that counter an increase in the averaged red channel? You may see your reddening in the un-grey balanced map-projected images.

Yes, certainly. And you can definitely see a color difference if you simply look at these two images in raw form.

The question is whether this is 1) a change in Junocam, 2) a change in Jupiter, or 3) a change in the illumination geometry. (I think we can rule out the illumination itself changing color.)

I vote for 2, and there are independent observations that suggest this is happening, at least for some areas.

One could perhaps look at the colors of the moons in various Junocam images over time to see if there has been a gross change in instrument response unrelated to the jovian atmosphere. Europa is probably the most color-neutral target.


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Posts in this topic
- mcaplinger   Juno Perijove 35 - Jupiter   Jul 22 2021, 10:12 PM
- - Bjorn Jonsson   Is anyone else getting very large values that must...   Jul 24 2021, 12:35 AM
|- - Brian Swift   QUOTE (Bjorn Jonsson @ Jul 23 2021, 04:35...   Jul 24 2021, 05:55 AM
|- - mcaplinger   QUOTE (Bjorn Jonsson @ Jul 23 2021, 05:35...   Jul 24 2021, 08:28 PM
|- - Bjorn Jonsson   QUOTE (mcaplinger @ Jul 24 2021, 08:28 PM...   Jul 26 2021, 12:49 PM
|- - mcaplinger   QUOTE (Bjorn Jonsson @ Jul 26 2021, 04:49...   Jul 26 2021, 03:27 PM
||- - Bjorn Jonsson   Thanks to Brian and Mike for the information above...   Jul 26 2021, 10:51 PM
|- - Brian Swift   QUOTE (Bjorn Jonsson @ Jul 26 2021, 05:49...   Jul 26 2021, 05:56 PM
- - Brian Swift   So I wonder if this is a daytime lightning flash i...   Jul 24 2021, 06:03 AM
- - Bjorn Jonsson   This is a part of image PJ35_55 in approximately t...   Aug 2 2021, 12:15 AM
|- - Brian Swift   QUOTE (Bjorn Jonsson @ Aug 1 2021, 05:15 ...   Aug 2 2021, 07:08 AM
|- - Bjorn Jonsson   QUOTE (Brian Swift @ Aug 2 2021, 07:08 AM...   Aug 2 2021, 11:49 AM
- - Bjorn Jonsson   Here is an example of the color change I'm see...   Aug 4 2021, 03:20 PM
|- - mcaplinger   QUOTE (Bjorn Jonsson @ Aug 4 2021, 07:20 ...   Aug 5 2021, 08:21 PM
|- - Bjorn Jonsson   QUOTE (mcaplinger @ Aug 5 2021, 08:21 PM)...   Aug 7 2021, 02:38 AM
|- - Brian Swift   QUOTE (Bjorn Jonsson @ Aug 6 2021, 07:38 ...   Aug 7 2021, 04:56 AM
|- - Bjorn Jonsson   QUOTE (Brian Swift @ Aug 7 2021, 04:56 AM...   Aug 7 2021, 02:36 PM
|- - mcaplinger   QUOTE (Bjorn Jonsson @ Aug 7 2021, 07:36 ...   Aug 7 2021, 05:11 PM
|- - Brian Swift   QUOTE (Bjorn Jonsson @ Aug 7 2021, 07:36 ...   Aug 7 2021, 05:56 PM
|- - mcaplinger   QUOTE (Brian Swift @ Aug 7 2021, 10:56 AM...   Aug 7 2021, 06:11 PM
- - Floyd   If grey balanced, wouldn't that counter an inc...   Aug 7 2021, 08:01 PM
|- - mcaplinger   QUOTE (Floyd @ Aug 7 2021, 01:01 PM) If g...   Aug 7 2021, 08:13 PM
- - Bjorn Jonsson   I decided to process two Hubble images from calibr...   Aug 8 2021, 01:38 AM
- - Bjorn Jonsson   Here is a quick comparison of southern hemisphere ...   Aug 11 2021, 10:53 PM
|- - JRehling   Here are images taken by Christopher Go in May 201...   Aug 12 2021, 03:44 PM
- - Bill Harris   What does Hubble show of Jupiter? I realize tha...   Aug 13 2021, 08:18 AM
|- - JRehling   As an instrument, HST is wonderful and could deliv...   Aug 13 2021, 04:20 PM
|- - mcaplinger   QUOTE (JRehling @ Aug 13 2021, 08:20 AM) ...   Aug 13 2021, 05:07 PM
|- - JRehling   Indeed. My negligence in reading the thread only a...   Aug 13 2021, 10:40 PM
- - fredk   About the colour shift, I don't know the detai...   Aug 14 2021, 12:44 AM
|- - Bjorn Jonsson   QUOTE (fredk @ Aug 14 2021, 12:44 AM) Abo...   Aug 16 2021, 10:48 PM
|- - JRehling   Just a bit of a wild / educated (?) guess… but is ...   Aug 17 2021, 12:09 AM
- - Brian Swift   Not necessarily a good metric, but an easy one to ...   Aug 14 2021, 06:40 AM
- - Bjorn Jonsson   That's one possibility I think. Another possib...   Aug 17 2021, 12:24 AM
|- - mcaplinger   QUOTE (Bjorn Jonsson @ Aug 16 2021, 05:24...   Aug 17 2021, 03:06 AM
- - Bjorn Jonsson   Thanks. A crude way to estimate the radiation dose...   Aug 17 2021, 01:23 PM
|- - JRehling   QUOTE (Bjorn Jonsson @ Aug 17 2021, 06:23...   Aug 17 2021, 02:18 PM
||- - mcaplinger   QUOTE (JRehling @ Aug 17 2021, 06:18 AM) ...   Aug 17 2021, 03:28 PM
|- - mcaplinger   QUOTE (Bjorn Jonsson @ Aug 17 2021, 05:23...   Aug 17 2021, 03:26 PM
|- - Brian Swift   QUOTE (Bjorn Jonsson @ Aug 17 2021, 06:23...   Aug 18 2021, 06:14 AM
|- - JRehling   That's a really nice result, Brian. One big ta...   Aug 18 2021, 02:13 PM
||- - Brian Swift   QUOTE (JRehling @ Aug 18 2021, 07:13 AM) ...   Aug 18 2021, 11:02 PM
|- - Bjorn Jonsson   QUOTE (Brian Swift @ Aug 18 2021, 06:14 A...   Aug 18 2021, 11:28 PM
- - Bjorn Jonsson   Details from image PJ35_58 in approximately true c...   Sep 3 2021, 12:47 AM
- - tau   QUOTE (Bjorn Jonsson @ Jul 27 2021, 12:51...   Oct 9 2024, 10:05 AM
|- - StargazeInWonder   It's remarkable that the colors of Jupiter...   Oct 10 2024, 06:09 AM
- - fredk   Is PCA very different from a simple saturation boo...   Oct 9 2024, 02:40 PM
- - tau   QUOTE (fredk @ Oct 9 2024, 04:40 PM) Is P...   Oct 10 2024, 12:34 PM
- - fredk   I guess I should've said saturation boost plus...   Oct 10 2024, 02:27 PM
|- - StargazeInWonder   Interesting thought, Fredk – definitely something ...   Oct 10 2024, 05:10 PM
- - Floyd   It certainly is a function of 3 input values, but ...   Oct 10 2024, 05:46 PM
- - Brian Swift   Sigh. I shall miss the inspiration/motivation I ge...   Oct 13 2024, 05:12 AM

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