Parent Topic: PARAMETERS

STARTFIL

Specifies the number of tape files to skip before reading the scene/image. If STARTFIL is 1, no files are skipped. If STARTFIL is "n", then n-1 tape files will be skipped before reading begins. STARTFIL is used to advance the tape position to the scene that you wish to import (for tapes containing multiple scenes). STARTFIL is typically set to 1, in order to read the first scene on a tape. This is the default value. If STARTFIL is not specified, or is less than 1 in value, it will be reset to 1. Note that MIAVHRR never does any rewinding of the tape. This allows consecutive scenes to be read off a tape without any rewinding between scenes (as long as STARTFIL is set properly each time).

 EASI>STARTFIL=               | start reading at 1st file on tape
 EASI>STARTFIL=1              | start reading at 1st file on tape
 EASI>STARTFIL=n              | start reading at nth file on tape

For the AES TeraScan format, STARTFIL should be an odd number.

 EASI>STARTFIL=3              | second AES TeraScan file on tape

For the CEOS format, STARTFIL should be 1, 6, 11, and so forth. Some CEOS tapes have an initial 100 byte header record which should be skipped. In this case, STARTFIL should be 2, 7, 12, and so forth. A CEOS scene/image always begins with "5 records of 360 bytes".

An example of MAGSTRU output for a CEOS format tape is shown below:

      1 records of   100 bytes    <- not part of CEOS format
            *** EOF ***
      5 records of   360 bytes    <- STARTFIL = 2  (Scene/Image 1)
            *** EOF ***
      6 records of  2520 bytes    <- leader file
            *** EOF ***
      3019 records of 21872 bytes <- imagery options file
            *** EOF ***
      6 records of  4140 bytes    <- trailer file
            *** EOF ***
      1 records of   360 bytes    <- null volume directory file
            *** EOF ***
      5 records of   360 bytes    <- STARTFIL = 7  (Scene/Image 2)
            *** EOF ***
      6 records of  2520 bytes
            *** EOF ***
          ...    ...   ...
          ...    ...   ...

Parent Topic: PARAMETERS
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