https://www.kari.re.kr/eng/sub03_07_01.do
The link is to the Korean Space Agency's page on Danuri, the nation's first lunar orbiter. It will launch from the US in early August and orbit the Moon for a year. Of particular note is he inclusion of Shadowcam, a US payload modified from the LRO NAC instrument to image in polar shadows. I think I have seen it is 200 times more sensitive that NAC. We can hope for a lot of interesting images of polar areas. Work on a followup lander is in progress but may be slow.
Phil
Thanks, Mike.
Thinking about its operation... an area near a PSR but not in it will often be shadowed but sometimes illuminated. When it is illuminated NAC can see it perfectly well, but it will have very pronounced shadows which might complicate mission planning (e.g. a rover traverse into the PSR). There might be some occasions where an area like that could be imaged while in shadow, with the more diffuse reflected light softening the shadows enough to be helpful.
I look forward to seeing the images.
Phil
BTW, in case this has occurred to anyone -- Shadowcam is not sensitive enough to see by Earthlight, but it's too sensitive to image anything illuminated by the Sun without saturating. So it can really only image shadowed regions slightly illuminated by surrounding lit topography. We tried to make it as insensitive to stray light as we could, but mixes of shadow and sunlight may cause problems -- we'll just have to see.
https://mobile.twitter.com/CNSpaceflight/status/1565226075424141313
Danuri images Earth and the Moon.
Phil
Round about now Danuri is at its most distant from Earth, 1.55 million km, out near Sun-Earth L1. It will now begin to fall in towards Earth and encounter the Moon in December.
Phil
A transit (passing over Korea) on 24 September. These are frames from a video on the mission website.
Phil
Sweet! Do you have a link to the original source?
John
I thought the link I put in the first post in this thread was to that page but I see now that it is not.
Here is the Danuri website's multimedia page:
https://www.kari.re.kr/kplo/multimedia
And this is that specific item:
https://www.kari.re.kr/kplo/danuri/multi/multiMediaView.do?idx=10&pageIndex=1&searchCnd=&searchWrd=
Phil
Danuri is approaching the Moon:
Safely in orbit and getting close to its 100 km science orbit. Meanwhile, see this excellent FISO talk by Ben Bussey (now at Intuitive Machines, previously NASA).
https://fiso.spiritastro.net/telecon/Bussey_12-21-22/
Phil
Absolutely incredible images from KPLO posted to https://twitter.com/kari2030/status/1610097598953828354.
Wow! Like the old LROC Earthrise from 2014, just b/w!
There are additional images here:
https://www.kari.re.kr/kplo/multimedia
Phil
A picture taken on 28 November 2022 at a distance such as the Earth and the Moon had the same apparent size for Danuri's camera.
Contrast increased on the Moon's surface since it appears far much darker than the Earth on the original image.
https://flic.kr/p/2oarxot
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."
Very impressive, Mike. Well done!
More from ShadowCam. This is part of a small crater inside a much larger one near the north pole. Check out the full mosaic at the bottom of the page, zoomable or downloadable.
Phil
https://www.shadowcam.asu.edu/images/1288
Some new images here:
https://www.kari.re.kr/kplo/danuri/multi/multiMediaView.do?idx=20&pageIndex=1&searchCnd=&searchWrd=
Phil
New image from ShadowCam - Marvin crater, which is adjacent to de Gerlache at one end of the 'Connecting Ridge' near the south pole.
https://www.shadowcam.asu.edu/images/1293
Phil
The quality of these images is remarkable. It's interesting to see the lighting coming from different directions in different parts of the image.
John
Another great image from ShadowCam.
https://www.shadowcam.asu.edu/images/1297
This is the central peak of Aristarchus seen by Earthlight. I hadn't thought much about Earthlight imaging before but now I am interested in seeing what some Apollo and other sites would look like.
Phil
Sweet! I remember seeing Apollo images of Orientale from lunar orbit in Earthlight, much lower resolution and grainier than this one. Probably in one of the Apollo Preliminary Science Reports (Phil would know).
John
Not an expert, but I recall looking at prints of Lunar Orbiter images that were of similar resolution to these impressive shots.
John's faith in me is touching.
According to my records, Apollo 13 was intended to image the area around Orientale by Earthshine at the end of its orbital phase (but didn't for obvious reasons). Some experimental Earthshine images of Aristarchus were taken by Apollo 15, followed by sunlit images of the same area later. Apollo 16 took a few images across Riccioli crater late in the mission. Finally, Apollo 17 took quite a few frames from the Luna 9 area out across Orientale.
In addition to these images, Earthshine images have also been taken by star-tracker cameras on Clementine and LADEE. I think Lunar Flashlight might have done the same (or perhaps one of the other recent lunar cubesats, RIP) if its mission had gone as intended.
Phil
Some nice new images on the Danuri website. A view of the central peak of Tsiolovskiy is particularly dramatic.
https://www.kari.re.kr/kplo/multimedia
Phil
Danuri's instrument images are now available for download, though it's a tricky business. Here's a link to the files released so far:
https://www.kari.re.kr/kpds/published/KPLO/KPLO/PublicRelease
As yet there's no map based search, which is a shame as the xml files accompanying the images don't seem to have lat/long data included (at least for LUTI).
There is a search facility, but it's difficult and slow to navigate, eg:
https://www.kari.re.kr/kpds/search_view/levelproduct?keyword=LUTI
Shadowcam data can be searched for here:
https://data.ser.asu.edu/lunaserv.html
Edited to add: They did release views of Apollo 11 and 17's landing sites here:
https://twitter.com/kari2030/status/1706532004945412205
The Shadowcam has also coverd Apollo 14, 15 and part of Taurus-Littrow under Earthshine conditions.
They have now added several more month's worth of LUTI and Shadowcam images.
As they seem to be pretty good at labelling the instrument target, the best method I've found of interrogating the LUTI files is to get a mass downloader extension (simple mass downloader works well) and grab all the .xml files for a given month. Once you have them you can then use Windows Explorer to search inside the files for (eg) Apollo. It's worth checking both A and B versions of the images.
Often the target label might be near and not actually show it, but it does at least reduce the amount of downloading you need to do. If they've got round to actually calibrating the raw images, the xml will show the lat/long of the observation.
So far LUTI has images of Apollo 11, 12, 14, 15 and 17. South Ray crater is captured nicelty at Apollo 16's site, but just misses the lunar module.
Shadowcam has Apollo 14, 15 and 16. They have shadowcam observation of Apollo 11 and 12, but there is insufficient ground disturbance there for them to register in the images.
It's interesting to get into these images! This LPSC abstract is a look at the LCROSS impact in Cabeus:
https://www.hou.usra.edu/meetings/lpsc2024/pdf/1913.pdf
Here is a Shadowcam look at a 700 m diameter crater near the LCROSS impact site.
Another addition to the LUTI archive for July 2023. Hopefully more to follow.
A nice shot of Apollo in there
Yes. It's Apollo 14. Here is a version with the striping removed.
Totally omitted '14' when typing - no idea why! That version I posted was based on processing their .img format raw image. Their own .png version is hard to improve on and doesn't have the banding!
The July 2023 .xml files also identify files as having Apollo 16 & 17 LMs, but they are some distance out.
August 2023 files now being added, but may possibly have stalled for the weekend.
Two great shots of Apollo 15.
There's also an interesting oblique view of Hadley rille, would be great if the matching image from camera B covers Apollo 15 as well.
The Shadowcam images take a bit of getting used to, having enormous variations in illumination from place to place. I have been working on the LCROSS site, so here are two sets of maps illustrating what could be done before Shadowcam and with it.
First, this set of maps zooms in on the impact area inside Cabeus. The first map is just LOLA shaded relief. The second map is LOLA with a bit of detail from Mini-RF, and the third map is mostly Mini-RF. The final sections (D and E) use radar images made at Goldstone. Mini-RF found a small bright spot in post-impact images at the location predicted for the LCROSS Centaur impact. The Goldstone image marginally resolved features suggestive of the Centaur and Shepherding Spacecraft (SSC) impact sites.
Raw images for August 2023 are now complete, Calibrated images will follow soon. Meanwhile, here's the Apollo 15 LM in the oblique shot I posted above, and two shots of Apollo 12's LM! No processing done on these.
Powered by Invision Power Board (http://www.invisionboard.com)
© Invision Power Services (http://www.invisionpower.com)