| Re: Need GOES Image Expert [message #59278 is a reply to message #59277] |
Mon, 17 March 2008 14:01   |
Kenneth P. Bowman
Messages: 585
Registered: May 2000
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Senior Member |
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In article <frmldh$au4$1@news.nems.noaa.gov>,
Paul van Delst <Paul.vanDelst@noaa.gov> wrote:
> David Fanning wrote:
>> Folks,
>>
>> A quick question for a GOES image expert. Are the GOES
>> satellite images, such as can be found here:
>>
>> http://goes.gsfc.nasa.gov/goeseast-lzw/peru/
>>
>> in some kind of map projection? Where can I learn about
>> these images? The GOES folks don't seem to be making this
>> information obvious. :-(
>
> From the same spot:
>
> http://goes.gsfc.nasa.gov/text/goesfaq.html#goesnav
> and
> http://goes.gsfc.nasa.gov/text/goesfaq.html#tiffcomment
>
> The former presents more nav info via a link:
> http://goes.gsfc.nasa.gov/text/goestechnotes.html#navigation
>
> From my experience, the GOES data is typically delivered as a "flat" file that replicates
> how the instruments actual record the data (e.g. raster scan of the earth disk).
>
> What that translates into wrt a map projection, I have no idea. I don't think GOES data
> works in that sort or realm (but I haven't used GOES data directly for about a decade, so
> what the hell would I know! :o)
>
> cheers,
>
> paulv
If you want to plot GOES data on maps, I suggest getting files from the NOAA CLASS
archive
http://www.nsof.class.noaa.gov/saa/products/welcome
You can order them in a variety of file formats, including my favorite, netCDF.
These files are "navigated", which means that they have a longitude and latitude
attached to each pixel, so they can be mapped with MAP_PATCH.
I might even be willing to part with some code to display the files if
suitably persuaded. :-)
Ken Bowman
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