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Chandrayaan 1, India's First Lunar Probe
Phil Stooke
post Sep 24 2019, 08:22 AM
Post #481


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Ohsin, there will be many other images not in that mosaic. I am travelling, but when I can I will find good images for us to work with.

Phil


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Phil Stooke
post Sep 27 2019, 06:29 PM
Post #482


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Hello, Ohsin. I used this site:

https://ode.rsl.wustl.edu/moon/indexMapSearch.aspx


to find, by trial and error, this image:

http://wms.lroc.asu.edu/lroc/view_lroc/LRO....0/M108986899RE


It is flipped left to right because of the way the camera works.

And here is the location of 3105 - I have flipped the base. Compare with your 3104 map to see how they join.

3205 is right at the 'top' (in my image) of ellipse 2 in my earlier post. If there are still several more images the impact is likely to be at the other end of my ellipse 2.

Rough prediction: 89.61 South, 108.0 East


Attached Image



Phil


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Phil Stooke
post Sep 28 2019, 08:24 AM
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This map shows the recently located images. The impact should be somewhere near the 'bottom' end (on the image) of the large white ellipse, well up on the connecting ridge between Shackleton and De Gerlache. The coordinates supplied to the UN are clearly not correct. There is a real possibility of locating the impact site in LRO images.

Phil

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Ohsin
post Sep 28 2019, 08:34 AM
Post #484


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That matches well Phil! Frame 3105 appears to be well more than a kilometer away from edge of frame 3104, so no overlaps.

Thanks for the alternate resource, it is very helpful and I am going through it. Here are two images with well illuminated areas where rest of missing frames and possible impact point should be.

https://ode.rsl.wustl.edu/moon/indexproduct...id=M108986899LC
https://ode.rsl.wustl.edu/moon/indexproduct...id=M108986899RC
https://ode.rsl.wustl.edu/moon/indexproduct...id=M108986899RE
https://ode.rsl.wustl.edu/moon/indexproduct...id=M109007281LC

Editing to add two more links
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Phil Stooke
post Oct 21 2019, 04:03 AM
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To follow up on this thread, I am attempting to get access to any remaining images from MIP to see if the impact site can be specified more precisely. Any news will be reported here. One conclusion - the impact was slightly on the far side, as the image two posts above shows.

Phil


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Ohsin
post Dec 7 2019, 02:33 PM
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Found a well illuminated capture of region of our interest, good direction of sweep too covering last few frames.

https://ode.rsl.wustl.edu/moon/indexproduct...id=M139783961LC
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Ohsin
post Jan 26 2020, 07:27 AM
Post #487


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Collection of few papers related to MIP.

https://archive.org/details/29p_20191209

According to first paper, MIP camera had resolution of 70 meters at 100 km altitude. Second paper gives altitude and footprint for frames #2871 and #2874 and as we have matched frame 3105 its footprint can perhaps be used to have an idea on MIP altitude for it, viewing angle should be close to zero before impact. I am guessing it should be about 2.5 km.

CODE
Frame#    View angle(degree)        Altitude(km)        Foot print(km^2)    Pixel no.
2871        2.3297                    21.18                10.93×8.44        720×576
2874        2.2776                    20.97                10.82×8.36        720×576
3105        0                        2.54(?)                1.06×1.24        720×576


For what it is worth, MIP #VIS 2874 on Quickmap (Lat: -79.18857 Lon: 14.25934)
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Phil Stooke
post Mar 12 2020, 03:14 AM
Post #488


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This image summarizes what we can now say about the MIP impact site. I only show images which are available at present. I have been seeking more but without success. It is possible that MIP flew over the ridge where I suggest it crashed and struck another ridge (the 'Connecting Ridge') a moment later. The map in A shows a projection of the descent trajectory to the surface at about 89.63° S, 110.77° W, slightly over the mean limb on the farside. Alternatively MIP may have passed just above that ridge and struck the surface near 89.42° S, 134.00° W. The impact feature has not been identified.

The first Artemis landing may be in this area and it is entirely possible that the first visitors in this century will find debris from MIP on the surface. Of course, we don't speak of such things here. Oops, I just did. Maybe they will send a robotic precursor, in which case it's allowed.

Phil

Attached Image


EDIT: replaced image with one containing the corrected Hindi text for Jawahar Point.


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Ohsin
post Mar 13 2020, 08:14 AM
Post #489


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Well laid out Phil! 'Jawahar Point' in Hindi is written as "जवाहर पॉइंट" or translated as 'Jawahar Sthal' i.e 'जवाहर स्थल'

Mapped last few frames and some region ahead on QuickMap.
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Phil Stooke
post Mar 13 2020, 05:01 PM
Post #490


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Thanks, Ohsin! I have corrected the Hindi text and replaced the above image with the corrected version.

Do you know if the Vikram landing site would have been given a name if it had landed successfully?

Phil


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Ohsin
post Mar 14 2020, 08:35 AM
Post #491


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I am sure they'd have something in mind but they didn't let it out. Date doesn't appear to have anything historically relevant to it as well.
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Phil Stooke
post Apr 4 2020, 02:36 AM
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I am revising my map of the MIP impact location based on topography and Ohsin's estimated altitude for the last image - see above. It looks to me as if the impact occurs at the location shown here, which is very close to (1 or 2 km from) the high point on the "Connecting Ridge" between Shackleton and De Gerlache craters. This is just about the most illuminated point on the moon and is one of the candidates for early robotic and human landings in the next few years. The map at left showing MIP image locations reveals the precession of the spinning probe during descent, as the images trace a sinuous path along the ground track. That's why the track in the map at right does not just follow the image footprint centroids. Obviously some further refinements are possible.

Phil


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Shan
post Oct 29 2020, 12:47 PM
Post #493


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QUOTE (Phil Stooke @ Apr 4 2020, 08:06 AM) *
I am revising my map of the MIP impact location based on topography and Ohsin's estimated altitude for the last image - see above. It looks to me as if the impact occurs at the location shown here, which is very close to (1 or 2 km from) the high point on the "Connecting Ridge" between Shackleton and De Gerlache craters. This is just about the most illuminated point on the moon and is one of the candidates for early robotic and human landings in the next few years. The map at left showing MIP image locations reveals the precession of the spinning probe during descent, as the images trace a sinuous path along the ground track. That's why the track in the map at right does not just follow the image footprint centroids. Obviously some further refinements are possible.

Phil


Attached Image


@Oshin - Whether the last 3 frames were correct & 3105? I have 3 frames from 3102 to 3105 and it doesn't match any of the stuff posted here (May be what I have is after 3105?)

I am not sure about the pics I have
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Phil Stooke
post Oct 29 2020, 06:41 PM
Post #494


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These are the last images I have:

Attached Image


And this is the source:

Attached Image


(download it here: )

https://vedas.sac.gov.in/vedas/downloads/at...oon_English.pdf

Are your images different? Please post them if they are.

(incidentally the top left image on the first picture is the Apollo 16 landing site seen from the south)


Phil


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Shan
post Oct 30 2020, 04:32 AM
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These images might be 3103,3104 & 3105 but not sure about whether these are the ones..
Attached thumbnail(s)
Attached Image
 

Attached File(s)
Attached File  VIS_3103.bmp ( 1.19MB ) Number of downloads: 154
Attached File  VIS_3104.bmp ( 1.19MB ) Number of downloads: 144
 
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