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[McIDAS #QQA-176689]: using IMGPROBE to retrieve cloud top temps from SATEPS composite

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  • Subject: [McIDAS #QQA-176689]: using IMGPROBE to retrieve cloud top temps from SATEPS composite
  • Date: Thu, 16 Mar 2006 13:55:03 -0700
Hi Robert,
 
> Tom, Here is the output from:
> >LWU LIST AREA1234 192 224
> 
> /usr2/config% lwu.k LIST AREA0001 192 224
> 192.  541348432           0 HEX: 20445250        0 ASCII: PRD
> 194.        255           0 HEX:       FF        0 ASCII:
> 196.        255           0 HEX:       FF        0 ASCII:
> 198.          0           0 HEX:        0        0 ASCII:
> 200.          0           0 HEX:        0        0 ASCII:
> 202.          0           0 HEX:        0        0 ASCII:
> 204.          0           0 HEX:        0        0 ASCII:
> 206.          0           0 HEX:        0        0 ASCII:
> 208.          0           0 HEX:        0        0 ASCII:
> 210.          0           0 HEX:        0        0 ASCII:
> 212.          0           0 HEX:        0        0 ASCII:
> 214.          0           0 HEX:        0        0 ASCII:
> 216.          0           0 HEX:        0        0 ASCII:
> 218.          0           0 HEX:        0        0 ASCII:
> 220.          0           0 HEX:        0        0 ASCII:
> 222.          0           0 HEX:        0        0 ASCII:
> 224.          0           0 HEX:        0        0 ASCII:
> --END OF LISTING

OK.  This listing shows that the AREA file in question does not have
a calibration that maps brightness to temperature.  In order to
get the mapping you want, you will have to add a PRD calibration
to the image using PRDUTIL.  Please note that whatever you do, you
will be assuming you know how SATEPS composite was created.  I am
not terribly worried about this given that they use standard McIDAS
routines to create a large fraction of their products.

I advise you to use the standard two part GOES/GVAR IR calibration
as listed in IRTEMP.ST:

SU LIST IRTEMP
BREAKPOINTS STORED IN TABLE : IRTEMP.ST
INPUT       OUTPUT
-----       ------
 163           255
 241.9999      177
 242           176
 330           0
CALIBRATION TYPE  : GVAR
CALIBRATION UNITS : TEMP
BAND NUMBER       : -1
INTERPOLATION TYPE: LIN
SU: DONE

Cheers,

Tom
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Ticket Details
===================
Ticket ID: QQA-176689
Department: Support McIDAS
Priority: Normal
Status: Closed