MEES WHITE LIGHT TELESCOPE

	RAW DATA TAPE FORMAT


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The MWLT raw data tapes are written as a series of FITS files.

The blocksize is 2880 bytes, the FITS standard.

Each image is a physical file, with an EOF at the end.

The FITS headers are minimal, of the form

	SIMPLE  =                    T
	BITPIX  =                    8
	NAXIS   =                    2
	NAXIS1  =                 1024
	NAXIS2  =                 1024
	DATE-OBS= '11-03-98'
	TIME-OBS= '17:10:25'
	INSTRUME= 'MEES WLT'
	END

The files can be read one file at a time with the UNIX system command

	dd  if=/dev/rmt/Nn  of=filename ibs=2880

		with	N the tape drive number
			filename the disk filename
			
The input blocksize can be any number greater than or equal to 2880.

The entire contents of a tape can be dumped to disk by running
the program /solar/Mees/MWLT/bin/MWLT_RD_TAPE n, where n is the tape
drive number.  The file names are obvious; a file "max.out" is
also written which give the maximum data number for each image..

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     Last modified: Mon May 17 17:12:48 HST 1999