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[McIDAS #VQU-472558]: imgcopy UNIT parameter

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  • Subject: [McIDAS #VQU-472558]: imgcopy UNIT parameter
  • Date: Thu, 29 Nov 2018 15:00:19 -0700
Hi Carol,

re:
> I'm starting to look into our AREA to netCDF conversion in mcidas. One
> thing that I still don't understand is the UNIT keyword. How do you know
> what unit to use when running your imgcopy? Is there a list somewhere that
> shows all the units that are available in mcidas?

The easiest way to see what units are available for an image is to use
the IMGPROBE command.  Here are IMGPROBEs of the most recent Channel 1
and Channel 13 GOES-East Full Disk images at the sub-satellite point:

IMGPROBE LIST POINT MODE=N DAT=RTGOESR/FDC01 LAT=0 75

     Image Name           Day      Nominal Time   Scan Time    Band
  ----------------      -------    ------------   ---------    ----
  RTGOESR/FDC01.0     29 Nov 18333   21:30:35      21:35:09       1

                        File     Nominal  Image     RAW         RAD         ALB 
        BRIT
       Lat/Lon      Line/Element  Line/Element                   *          %
-0:00:24 / 75:00:08   5424/ 5423   10849/10847            127      77.201       
11.69          87
 *   watts/meter**2/steradian/micron

IMGPROBE: Done
 
IMGPROBE LIST POINT MODE=N DAT=RTGOESR/FDC13 LAT=0 75

                        File     Nominal  Image     RAW         RAD         
TEMP        BRIT
       Lat/Lon      Line/Element  Line/Element                   *          K
-0:00:24 / 75:00:40   2712/ 2711   10849/10845           1108      49.023      
257.91         144
 *   milliwatts/meter**2/steradian/(cm-1)

IMGPROBE: Done

The units for each image are the 4-character names listed after 'File     
Nominal  Image':

Channel 1
RAW         RAD         ALB         BRIT

Channel 13
RAW         RAD         TEMP        BRIT


The HELP for IMGCOPY says the following for the UNIT= keyword:

   UNIT= | calibration unit for output image file; use this keyword with
           GEOT- and NCDF-format destination datasets; to determine
           available units, display the source image and run the D command
           (def=primary calibration unit in source image)

NB:

The D command is a short cut for 'IMGPROBE LIST POINT MODE=N'

Cheers,

Tom
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Ticket Details
===================
Ticket ID: VQU-472558
Department: Support McIDAS
Priority: Normal
Status: Closed
===================
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