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20010427: higher resolution global composite IR images (cont.)

>From: Edward Hindman <address@hidden>

>On Fri, 27 Apr 2001, Unidata Support wrote:
>Organization: CCNY
>Keywords: 200104271758.f3RHwBL11872 McIDAS 

Ward,

re: using ALOOP to do a loop of more than 5 images
>There are seven files from 00Z to 21Z (image every 3-hrs) in the 
>mcidas/data/ directory.

Aha!  That is the problem.  ALOOP has a concept of a limit of how long
it will look back in time to get images.  This is controlled with the
LIMIT= keyword:

     LIMIT= maximum time limit between images in loop. Entered as
            whole hours (default=12)

You can see that the LIMIT to look back in time is 12 hours.  So, images
older than 12 hours from the current time will be ignored no matter how
many frames you ask for in a loop.  You can change your "window" as follows:

ALOOP 2350 2370 1 20 LIMIT=60

This assumes that the images in AREA file numbers 2350 through 2370 are
all of the same type, etc.

>I just built the loop in the following manner:
>
>ALOOP 2350 2353 1 4
>ALOOP 2354 2357 5 4
>LB 1 8
>DR 3 3 3 3 3 3 3 10
>
>It works!

The easier way is:

ALOOP 2350 2357 1 8 LIMIT=24
LB 1 8
DR 3 3 3 3 3 3 3 10

re: login info for wxnut

Thanks.

>Thanks for the IMGREMAP advice.  We'll give it a go.

OK.  I had success in my email to SSEC regarding a more useful global
IR composite image that is freely available.  Here is the information
I received back from SSEC with respect to the global Mollweide IR and
WV images that are in the Unidata-Wisconsin datastream:

  From: Jerrold Robaidek <address@hidden>
  Date: Fri, 27 Apr 2001 17:17:20 -0500

  These are the ones that were available for as long as I have been here.
  
  For IR goto:
  ftp://ftp.ssec.wisc.edu/pub/outgoing/
  
  IR Moll composite     ftp://ftp.ssec.wisc.edu/pub/outgoing/AREA0998
  remapped with mremap (I don't remember the history behind this.)
  
  IR Moll composite     ftp://ftp.ssec.wisc.edu/pub/outgoing/AREA0098
  remapped with imgremap
  
  IR Rect composite     ftp://ftp.ssec.wisc.edu/pub/outgoing/AREA8760
  
  For WV goto:
  
  ftp://ftp.ssec.wisc.edu/pub/incoming/
  WV Moll composite     ftp://ftp.ssec.wisc.edu/pub/incoming/AREA0298
  
  I can't explain the directory locations other than history.  Please
  note: we do not guarantee the availability of these composites via ftp.  
  I.e.  they get placed here, and disk space and other things affecting
  their availability are not actively monitored or controlled by the Data
  Center.  If they fit their needs, fine, otherwise, if they want these
  data more "operationally",  they should contact the Data Center
  regarding their purchase.
  
  Hope this helps,

  Jerry

The first two images that Jerry refers to (AREA0998 and AREA0098 are
exactly the same as the Mollweide IR image that is in the
Unidata-Wisconsin broadcast).  The last image he refers to is the
Mollweide WV (Water Vapor) image that is in the UW broadcast.  The
image you should be most interested in is:

IR Rect composite     ftp://ftp.ssec.wisc.edu/pub/outgoing/AREA8760

I just FTPed it and took a look.  It seems to me to be more useful
for looking at Nepal than the Mollweide image in the Unidata-Wisconsin
datastream.

You should grab:

<login as wxnut>
cd mcidas/dasta
ftp ftp.ssec.wisc.edu
  <user> anonymous
  <pass> address@hidden
  cd pub/outgoing
  binary
  get AREA8760
  quit

the image and take a look:

<start your McIDAS-X session; I suggest with a larger frame than the
default 640x480>
mcidas -f -17 -f 17@800x600
IMGDISP MYDATA/IMAGES.8760 LATLON=30 -92 EU=IMAGE REFRESH='EG;MAP SAT'

Let me know what you think of the non-Mollweide image.  Also, please note
the disclaimer that Jerry sent regarding the availability of the rectilinear
(RECT) composite.

Tom