| map all-sky image [message #33490] |
Wed, 08 January 2003 08:26  |
knielsen
Messages: 4
Registered: January 2003
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Junior Member |
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Hi,
I have an all-sky image (180 degree FOV using equidistant projection
to image onto the image plane) which I want to map to an altitude of
app. 85 km.
Is there any function in IDL that can do that ??
Thanks,
Kim
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| Re: map all-sky image [message #33522 is a reply to message #33490] |
Fri, 10 January 2003 05:29  |
R.G. Stockwell
Messages: 363
Registered: July 1999
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Senior Member |
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Kim Nielsen wrote:
...
>
> Thanks,
> I just came over some old images and wanted to play around with them.
> Mike is actually my advisor so I will go and ask him :)
>
> Kim
>
I have not done flat fielding, so unfortunately I can't give you code for that.
But if you want to just play around, perhaps you can select a subset of the image
near zenith, and ignore the flat fielding (should be ok for the middle ~15 or 20 degrees).
Or just assume the ground and the oh layer are parallel, and do the simple
trig to project the image. Good luck!
Cheers,
bob stockwell
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| Re: map all-sky image [message #33527 is a reply to message #33490] |
Thu, 09 January 2003 19:20 |
knielsen
Messages: 4
Registered: January 2003
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Junior Member |
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"R.G. Stockwell" <sorry@noemail.now> wrote in message news:<3E1DEA90.9050505@noemail.now>...
> Kim Nielsen wrote:
>
>> Hi,
>>
>> I have an all-sky image (180 degree FOV using equidistant projection
>> to image onto the image plane) which I want to map to an altitude of
>> app. 85 km.
>> Is there any function in IDL that can do that ??
>>
>> Thanks,
>> Kim
>>
>
> Hi Kim,
> this may sound like a strange response,
> but go ask Prof. Mike Taylor at your university.
> (or did he assign this to you?)
> He has done the flat fielding of OH infrared all sky images,
> on the off chance that this is what you are asking about.
>
> Cheers,
> bob stockwell
Thanks,
I just came over some old images and wanted to play around with them.
Mike is actually my advisor so I will go and ask him :)
Kim
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| Re: map all-sky image [message #33532 is a reply to message #33490] |
Thu, 09 January 2003 13:33 |
R.G. Stockwell
Messages: 363
Registered: July 1999
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Senior Member |
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Kim Nielsen wrote:
> Hi,
>
> I have an all-sky image (180 degree FOV using equidistant projection
> to image onto the image plane) which I want to map to an altitude of
> app. 85 km.
> Is there any function in IDL that can do that ??
>
> Thanks,
> Kim
>
Hi Kim,
this may sound like a strange response,
but go ask Prof. Mike Taylor at your university.
(or did he assign this to you?)
He has done the flat fielding of OH infrared all sky images,
on the off chance that this is what you are asking about.
Cheers,
bob stockwell
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