My Assistant
| Posted on: Jan 29 2023, 10:18 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Could you please release at least one of the invalid raw images, if they aren't completely saturated by noise? Everyone should stop assuming that somehow this is a choice I can make, it's above my pay grade. If the images showed anything useful in terms of scene content, we would have pushed harder to get them released. |
| Forum: Juno · Post Preview: #259676 · Replies: 27 · Views: 9666 |
| Posted on: Jan 29 2023, 03:54 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
To correct some misimpressions I have heard in various channels: The Junocam instrument paper says that QUOTE A platinum resistance thermometer (PRT) on the camera focal plane is read by the spacecraft to provide temperature knowledge for radiometric calibration. Since PDS release 8, the focal plane temperature is given in the metadata for each image. It is not correct (always says 0C) in earlier releases and in the missionjuno metadata for regrettable but unintentional software bookkeeping reasons. I wish I could describe our ongoing diagnostic efforts in more detail, but I can't for various reasons that those of us who have worked on these missions are all too aware of. |
| Forum: Juno · Post Preview: #259668 · Replies: 27 · Views: 9666 |
| Posted on: Jan 28 2023, 04:48 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
https://www.nasa.gov/feature/jpl/nasa-s-jun...lyby-of-jupiter QUOTE The JunoCam imager aboard NASA’s Juno spacecraft did not acquire all planned images during the orbiter’s most recent flyby of Jupiter on Jan. 22. Data received from the spacecraft indicates that the camera experienced an issue similar to one that occurred on its previous close pass of the gas giant last month, when the team saw an anomalous temperature rise after the camera was powered on in preparation for the flyby. However, on this new occasion the issue persisted for a longer period of time (23 hours compared to 36 minutes during the December close pass), leaving the first 214 JunoCam images planned for the flyby unusable. As with the previous occurrence, once the anomaly that caused the temperature rise cleared, the camera returned to normal operation and the remaining 44 images were of good quality and usable. The good images have been posted to missionjuno. |
| Forum: Juno · Post Preview: #259660 · Replies: 27 · Views: 9666 |
| Posted on: Jan 20 2023, 07:04 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
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| Forum: Juno · Post Preview: #259618 · Replies: 39 · Views: 20155 |
| Posted on: Jan 19 2023, 09:19 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Added to https://www.nasa.gov/feature/jpl/juno-space...lyby-of-jupiter QUOTE UPDATED Jan. 19, 2023: Data received from Juno indicates the first four of 90 images taken by the spacecraft’s JunoCam outreach camera during its most recent flyby of Jupiter (Perijove 47) were degraded: two were unusable and two had a high level of image noise. The JunoCam team believes the loss of these images is due to an anomalous temperature rise that occurred when the camera power was turned on in preparation for the flyby. Subsequent images – captured after the instrument returned to normal temperatures – were not degraded. The team plans to leave the instrument turned on after the next flyby, Perijove 48, rather than powering it off and then on again before Perijove 49. JunoCam is a color, visible-light camera designed to capture pictures of Jupiter’s cloud tops. It was included on the spacecraft specifically for purposes of public engagement; although its images have been helpful to the science team, it is not considered one of the mission’s science instruments. The camera was originally designed to operate in Jupiter’s high-energy particle environment for at least seven orbits but has survived far longer. The spacecraft will make its 48th pass of the planet on Jan. 22. I can't comment on this further except to say that this was not my suggested wording. |
| Forum: Juno · Post Preview: #259615 · Replies: 39 · Views: 20155 |
| Posted on: Jan 10 2023, 12:09 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
http://shadowcam.sese.asu.edu/images/1284 "The first ShadowCam image from orbit reveals the permanently shadowed wall and floor of Shackleton crater in never before seen detail." |
| Forum: Lunar Exploration · Post Preview: #259544 · Replies: 38 · Views: 30097 |
| Posted on: Jan 5 2023, 03:14 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
A bunch of images (not all, but most) have been pushed out to missionjuno. |
| Forum: Juno · Post Preview: #259493 · Replies: 39 · Views: 20155 |
| Posted on: Dec 31 2022, 09:33 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
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| Forum: Juno · Post Preview: #259455 · Replies: 39 · Views: 20155 |
| Posted on: Dec 30 2022, 07:15 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
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| Forum: Venus · Post Preview: #259444 · Replies: 7 · Views: 8463 |
| Posted on: Dec 29 2022, 11:04 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
FYI, I don't expect that any of the images will show up on missionjuno before next week. You'll note that there are no C kernels posted yet and that is a gating event. I think the holiday season has slowed everything down. Sorry for any frustration. |
| Forum: Juno · Post Preview: #259436 · Replies: 39 · Views: 20155 |
| Posted on: Dec 23 2022, 04:02 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
I think a savvier approach would have been for the project to post timely updates on the problem discovery, diagnosis, and resolution. Drama of "spacecraft in trouble" to "Can-do engineers to the rescue" could have added a few more days to Juno's periodic blip in the "news cycle". I think you overstate the amount of drama and interest that could have been milked out of this particular event. I can't recall a relatively routine safe mode entry that was handled this way in the past. If we had been in any real jeopardy, maybe. At any rate, nothing to do with me -- I got my hand slapped way back on Mars Observer for mentioning a safe mode entry in public and won't make that mistake again. BTW, I am gratified by Junocam images ending up on several "best space images of 2022" lists, mostly due to the processing by the folks here and elsewhere doing their processing magic. |
| Forum: Juno · Post Preview: #259389 · Replies: 39 · Views: 20155 |
| Posted on: Dec 23 2022, 05:30 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
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| Forum: Juno · Post Preview: #259382 · Replies: 39 · Views: 20155 |
| Posted on: Dec 23 2022, 01:40 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Thanks for the update. I was actually starting to wonder if something like this had happened and recently started monitoring https://eyes.nasa.gov/dsn/dsn.html. I've been working on a script to look for safe-mode entries using the Eyes data. You definitely would have seen some odd things had you been looking over the weekend. |
| Forum: Juno · Post Preview: #259378 · Replies: 39 · Views: 20155 |
| Posted on: Dec 23 2022, 01:30 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
https://www.missionjuno.swri.edu/news/juno-...m5gobVHSUSmh2as QUOTE NASA’s Juno spacecraft completed its 47th close pass of Jupiter on Dec. 14. Afterward, as the solar-powered orbiter was sending its science data to mission controllers from its onboard computer, the downlink was disrupted... Mission controllers at NASA’s Jet Propulsion Laboratory and its mission partners successfully rebooted the computer and, on Dec. 17, put the spacecraft into safe mode... As of Dec. 22, steps to recover the flyby data yielded positive results, and the team is now downlinking the science data. But I'm not sure when we will have enough to begin posting to missionjuno -- maybe tomorrow. |
| Forum: Juno · Post Preview: #259376 · Replies: 39 · Views: 20155 |
| Posted on: Dec 18 2022, 10:59 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Isn't that for Mars missions? It is certainly in the Mars forum. It's not like the forum organization is completely consistent, especially in regard to when a subforum is created and when it's not. It makes more sense to me to create a new topic in lunar exploration for the LO and Ranger stuff, etc. And I was under the impression that hosting a lot of images on UMSF was being discouraged. See the discussion at http://www.unmannedspaceflight.com/index.php?showtopic=8656 although there was no definitive statement made by admins. |
| Forum: Forum Guide · Post Preview: #259340 · Replies: 130 · Views: 814108 |
| Posted on: Dec 13 2022, 12:36 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Evidence of an oceanic impact and megatsunami sedimentation in Chryse Planitia, Mars I expect that this paper will meet with a fairly skeptical response from most of the community. Whatever happened to the "White Mars" idea that there was never any liquid water on Mars? This is the pendulum swung to the other side |
| Forum: Mars · Post Preview: #259283 · Replies: 4 · Views: 8993 |
| Posted on: Dec 7 2022, 08:55 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Have we got any sites outlining or detailing the mission or the equipment? Not a lot of info AFAIK. https://nssdc.gsfc.nasa.gov/nmc/spacecraft/...on?id=PEREGRN-1 and https://nssdc.gsfc.nasa.gov/nmc/spacecraft/...aftId=PEREGRN-1 has a summary of the spacecraft and instruments. I presume the lander itself has some kind of camera but the payload doesn't appear to. [edit: https://www.astrobotic.com/lunar-delivery/manifest/ has some information about non-NASA payloads. Note that it still gives Lacus Mortis as the landing site.] |
| Forum: Lunar Exploration · Post Preview: #259267 · Replies: 51 · Views: 35743 |
| Posted on: Dec 1 2022, 09:53 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
ISTR discussions to the effect that Ingenuity's cellphone CPU is faster and more capable than the Perseverance CPU Yes, the helicopter's Snapdragon 801 has about 16x more DRAM and 16x faster processor clock rate than the RAD750. But the helicopter's core microcontroller (TMS570LC43x) is only a little bit faster than the RAD750 and has less DRAM. https://rotorcraft.arc.nasa.gov/Publication...AA2018_0023.pdf https://en.wikipedia.org/wiki/RAD750 |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #259228 · Replies: 818 · Views: 437235 |
| Posted on: Nov 27 2022, 03:27 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
It takes plenty of creative license in doing it... - personifying the rover a LOT - but at the service of telling that emotional story accurately. I suppose that's true. My opinion, FWIW: It's not like I was deeply involved in MER (and a tiny bit miffed that my small role in the MER-A landing didn't make the cut) but I've always felt that this degree of anthropomorphism was either something other people felt, or was being played up for the cameras. I see less of it on MSL and M2020, though perhaps I just don't run in the right circles. Perhaps the "plucky underdog" aspect of MER played into it. Guess I'm just a heartless engineer. "How strange -- indeed, how perverse -- to weep for a machine!" - Arthur C. Clarke, GLIDE PATH, 1963 |
| Forum: Tech, General and Imagery · Post Preview: #259197 · Replies: 12 · Views: 15726 |
| Posted on: Nov 24 2022, 05:22 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
The Andor image is a composite of pieces from multiple JunoCam images. Thanks, Brian! I'm curious as to how this was done; as you say only a small part of the image is from PJ20-026. I wonder if they used something like stable diffusion or if the blending was done more manually? Nice to be a tiny part of this excellent series! |
| Forum: Chit Chat · Post Preview: #259175 · Replies: 3 · Views: 5429 |
| Posted on: Nov 23 2022, 09:22 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Is the gas giant that Narkina 5 orbits in ANDOR episode 8 a Junocam image of Jupiter? If so, does anyone recognize which one? https://starwars.fandom.com/wiki/Narkina_5?...ina5-Andor8.png |
| Forum: Chit Chat · Post Preview: #259166 · Replies: 3 · Views: 5429 |
| Posted on: Nov 22 2022, 08:22 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Though I'm not sure how much artistic license there is in Perseverance's mast tracking the ascent like depicted. It will be trickier than following Ingenuity's flights was! Imaging while actually moving the RSM has never been done on M2020 as far as I know (IIRC we did test this on the ground for MSL but haven't done it on Mars.) We talked about trying to track the helicopter but the lack of exact timing knowledge simply didn't allow it (all of those shots were locked down, usually with a wide and narrow field on the two Mastcams), so I wouldn't count on it happening here either. Might make you wonder what other seemingly cool parts of the video are just made up BTW, isn't this "ESA" video just a JPL video with an ESA logo stuck in the corner? https://www.youtube.com/watch?v=t9G36CDLzIg |
| Forum: Past and Future · Post Preview: #259156 · Replies: 579 · Views: 574531 |
| Posted on: Nov 20 2022, 04:45 PM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
I was involved in the data taking for Mastcam-Z but responsibility for calibration rests with a working group of the science team. There is an open literature paper on that: https://link.springer.com/article/10.1007/s11214-021-00795-x I didn't have anything to do with Navcam. There's supposed to be enough info in the data product SIS to answer any question one might have. |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #259135 · Replies: 178 · Views: 141323 |
| Posted on: Nov 19 2022, 01:22 AM | |
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
Janus in limbo: https://blogs.nasa.gov/janus/2022/11/18/jan...aunch-manifest/ |
| Forum: Cometary and Asteroid Missions · Post Preview: #259122 · Replies: 62 · Views: 130929 |
| Posted on: Nov 10 2022, 10:51 PM | ||
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2559 Joined: 13-September 05 Member No.: 497 |
We have had some inquiries over the years about color calibration for the Mars2020 cameras. For WATSON, the best I can offer is the attached image from the calibration dataset (see https://www.researchgate.net/publication/34...ibration_Report ) This image was taken with 100 msec exposure time, 8-bit linear divide by 8 encoding, and is Bayer-interpolated but otherwise straight out of the camera. It was illuminated by a commercial halogen worklamp (Britek Halo Flood Twin 1200S) with two 500 watt bulbs with a stated color temperature of 3150K. The light source was not calibrated and the geometry was not recorded. The target is a commercial "Macbeth ColorChecker" ( https://en.wikipedia.org/wiki/ColorChecker ) made by X-Rite and purchased sometime around 2010, I'm guessing. These charts have gone though a variety of manufacturers (they're now made by Calibrite) and I don't know how their colors may have varied; we made no attempt to measure this one. |
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| Forum: Perseverance- Mars 2020 Rover · Post Preview: #259077 · Replies: 178 · Views: 141323 |
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