[gradsusr] An error occurred while displaying satellite data

Charles Tai zhong2101 at gmail.com
Thu Nov 14 23:47:39 EST 2013


Dear GrADS users,
I'm trying to display satellite images of pgm format with GrADS.
These are what I did for that:
1. Take away the header of pgm file to prevent of the geographic shifting.
2. Write a description file (as the attached file) for GrADS.
These procedures performed well in displaying IR images, but did not work
for vis images.
Here are the error message I got from it:
---------------------------------------------------------------------
Low Level I/O Error:  Read error on data file
  Data file name = ./sat/MTS212%m2%d2%h2VIS.pgm
  Error reading 560 bytes at location 313040
Data Request Error:  Error for variable 'mtsat'
  Error ocurred at column 1
DISPLAY error:  Invalid expression
  Expression = mtsat
----------------------------------------------------------------------
Does anyone have similar experiences like this?
I would appreciate any help.
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