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.help vtexamine Jan86 noao.imred.vtel
.ih
NAME
vtexamine -- examine the headers and record structure of vacuum telescope files
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USAGE
mtexamine tape_file
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PARAMETERS
.ls tape_file
Tape file, e.g. "mta1600[2]" or "mta1600".
.le
.ls files
List of tape file numbers or
ranges delimited by commas, e.g. "1-3,5-8".
File_list is requested only if no file number is given in tape_file.
Files will be read in ascending order, regardless of the order of the list.
Reading
will terminate if EOT is reached, thus a list such as "1-999"
may be used to read all the files on the tape.
.le
.ls headers=yes
Decode and print header information from each file examined.
.le
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DESCRIPTION
By default, vtexamine decodes and prints header and record
structure information for each file examined. The header
information can be turned off by setting headers=no.
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EXAMPLES
1. To see the header information and determine the record structure of all the
files on a vacuum telescope tape and send the result to the file vtdump:
.nf
vt> vtexamine mtb1600 1-999 > vtdump
.fi
2. To just get the record structure for the third file on a vacuum telescope
tape the command would be:
.nf
vt> vtexamine mtb1600[3] headers=no
.fi
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BUGS
The IRAF magtape i/o routines do not permit data beyond a double EOF
to be accessed. Therefore vtexamine cannot be used to examine tapes with
embedded double EOFs.
.endhelp
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