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20040726: McIDAS localization question



>From: Tiziana Cherubini <address@hidden>
>Organization: University of Hawaii
>Keywords: 200407262126.i6QLQBaW013789 McIDAS IMGCOPY

Hi Tiziana,

>       I have a question for you about Mcidas localization
>domain. As I told you I have now access to GOES-10 data (10
>bit resolution...) and I set up a batch script to transfer
>on our server only the portion of the GOES10 full disk that we
>need for our assimilation purposes. The area coverage that we
>need is approximatly: 185W;135W and 0N;40N.

OK.

>In my script I'm running the imgcopy command with the option
>LATLON=20 157.5 (center of our domain) and SIZE=4200 7400
>for the visible channel (~1 km resolution). The size is scaled
>for the other channels accordingly to the change in resolution.

OK.  I just ran the following command successfully while pointing
at an ADDE dataset that has the full set of GOES-West imagery:

IMGCOPY WEST/NH MYDATA/IMAGES.1234 LAT=20 157.5 SIZE=4200 7400 BAND=1

The image was centered like you are intending and the areal extent
is again what you want.

>In this way I should get a domain that has 4200 lines and 7400
>pixels centered on LATLON, isn't it?

Yes.

>The problem is that sometime,
>when I pass the satellite data to our assimilation program, I
>get error message indicating that the satellite coverage isn't
>the correct one.

>It looks like the SIZE that I'm getting isn't
>centered on what indicated in the LATLON parameter... of course
>I could get the full disk, but, for storage purposes, I'd like
>to get just the area that we need.

In order to troubleshoot this, you should get a full listing of the
image that was copied.  For my example above, the listing command would
be:

IMGLIST MYDATA/IMAGES.1234 FORM=ALL

The next thing is to display the image (massively blown down) and
verify that the areal extent is what you want:

IMGDISP MYDATA/IMAGES.1234 MAG=-9
MAP H 1 LALO -2 INT=5 5

>Could you please help me in setting the right flag for the
>imgcopy command?

It sounds like you are setting the keywords for IMGCOPY correctly,
but letting me see your full command line would be helpful.  Even
more helpful would be a listing of your script.

I would first list out info on the image that was copied and
display it to verify that it is what you want.

>Thanks a lot!

No worries.

Cheers,

Tom
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>From address@hidden  Mon Jul 26 20:00:28 2004

Hi Tom,

        thanks. I've done as you said and now I know what the
problem is: I need to enlarge the image size a bit on the southern
edge! But thanks for the tips! They've been really useful.
Mahalo,

                Tiziana.


NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.