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Lunar Orbiter - calculating the corner coordinates, I need to calculate these for myself for a new project
Qmantoo
post Nov 17 2010, 01:10 AM
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I wonder if all you knowledgable people can help me find out how to calculate the corner coordinates of a lunar orbiter photo please?

I suspect it is a fairly basic astonomical calculation but I do not know how to do it.
I want to program (calculate for myself not find out from other websites) the corner coordinates of the old Lunar Orbiter 1-5 photographs, both medium and high resolution ones for a new web project I am starting.

I guess the formula for doing this has something to do with the height of the spacecraft, the angular coverage and the centre point of the photo. I have found this information and I know that the angular coverage of medium resolution photos taken with the 80mm lens is 44.4 degrees x 38 degrees and the coverage for the 610mm lens for high-resolution photos is 20.4 x 5.16 degrees.

I have found diagrams explaining it all but it is a long time since my school days and geometry was never my best subject, so I am hoping that some good soul has a formula somewhere so that I can just plug in the appropriate values and get the answer. smile.gif

Any help would be appreciated.
Thanks. Paul
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Phil Stooke
post Nov 17 2010, 02:34 PM
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Hi - this is what you want:

http://nssdc.gsfc.nasa.gov/nmc/datasetDisp...o?id=PSPG-00160
You should contact NSSDC to see if they have the data in hard copy which could be scanned and OCR'd into a text file. See the email link at the bottom of that page.

It was my understanding that the Orbiter 1 data were missing, however. That's why the global photomosaic has a hole in it.

Phil



--------------------
... because the Solar System ain't gonna map itself.
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Posts in this topic
- Qmantoo   Lunar Orbiter - calculating the corner coordinates   Nov 17 2010, 01:10 AM
- - JohnVV   ??? good question this is just a guess . The firs...   Nov 17 2010, 05:06 AM
- - Qmantoo   Thanks for your reply, however, I dont know how to...   Nov 17 2010, 10:14 AM
- - Phil Stooke   Hi - this is what you want: http://nssdc.gsfc.nas...   Nov 17 2010, 02:34 PM
- - Qmantoo   Thanks Phil, Thats great. I would have searched fo...   Nov 17 2010, 11:41 PM
- - Qmantoo   I have found what I was looking for in excel forma...   Nov 18 2010, 01:29 AM
- - Qmantoo   This csv file is from here This data says in it ...   Dec 2 2010, 06:33 AM
- - Phil Stooke   Do they match what you would expect if you plot th...   Dec 2 2010, 12:42 PM
|- - Qmantoo   QUOTE (Phil Stooke @ Dec 2 2010, 08:42 PM...   Dec 3 2010, 02:05 AM
- - Phil Stooke   Understood! But still, plotting them might te...   Dec 3 2010, 03:45 AM
- - JohnVV   QUOTE (maybe a spacecraft orientation for thermal ...   Dec 3 2010, 04:11 AM
- - Qmantoo   The point is that there must be good data around s...   Dec 4 2010, 01:46 AM
- - JohnVV   you do know just how old the lo data is Lunar Orb...   Dec 4 2010, 03:00 AM
- - Qmantoo   QUOTE you do know just how old the lo data is Lun...   Dec 4 2010, 06:33 AM
- - JohnVV   QUOTE I am sorry, but I do not see what age of dat...   Dec 4 2010, 09:31 AM
- - Phil Stooke   I was going to suggest that you ask on the ISIS/GI...   Dec 4 2010, 02:40 PM
- - Qmantoo   OK, thanks to all of you for your help on this. Fo...   Dec 6 2010, 04:21 AM


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