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+.help r2df Jun86 noao.mtlocal
+.ih
+NAME
+r2df -- convert CTIO 2D-Frutti image files to IRAF image files
+.ih
+USAGE
+r2df r2df_file file_list iraf_file
+.ih
+PARAMETERS
+.ls 4 r2df_file
+The 2D-Frutti data source.  If the data source is a disk file or an explicit
+tape file
+specification of the form mt*[n] where n is a file number then only that file
+is converted.  If the general tape device name is given, i.e. mta, mtb800, etc,
+then the files specified by the files parameter will be read from the tape.
+.le
+.ls file_list
+The files to be read from a tape are specified by the file_list string.  The
+string can consist of any sequence of file numbers separated by
+at least one of comma, or dash.
+A dash specifies a range of files.  For example the string
+
+	"1,2,3-5,8-6"
+
+will convert the files 1 through 8.
+.le
+.ls iraf_file
+The IRAF image file which will receive the 2D-Frutti data if the make_image
+parameter switch is set.  For tape files specified by the file_list parameter
+the filename will be used as a prefix and the file number will be appended.
+Otherwise, the file will be named as specified.  Thus,
+reading files 1 and 3 from a 2D-Frutti tape with a filename of data will produce
+the files data1 and data3.  It is legal to use a null filename.
+.le
+.ls make_image = yes
+This switch determines if 2D-Frutti image data is converted to an IRAF image
+file.  This switch is set to no to obtain just header information with the
+long_header or short_header switches.
+.le
+.ls long_header = no
+If this switch is set the full 2D-Frutti header is printed on standard output.
+.le
+.ls short_header = yes
+If this switch is set only the output filename,
+the title string, and the image dimensions are printed.
+.le
+.ls standard_format = yes
+The 2D-Frutti standard format has least significant byte first.  Some 2D-Frutti
+data, however, does not follow this byte order convention.  Thus, to read
+the non-standard 2D-Frutti data this parameter is set to no.
+.le
+.ls datatype = "s"
+The IRAF image file may be of a different data type than 2D-Frutti image data.
+The data type may be specified as s for short, l for long, r for real, and
+d for double.  The user must beware of truncation problems if an
+inappropriate data type is specified.  If an incorrect data_type or a
+null string is given for this parameter then a default data type is used
+which is the appropriate minimum size for the input pixel values.
+.le
+.ls offset = 0
+Offset is an integer parameter specifying the offset to the tape file number
+appended to iraf_file.  For example if the user specifies offset = 100,
+iraf_file = "r2d" and file_list = "1-3", the output file names produced
+will be "r2d101", "r2d102" and "r2d103" respectively, instead of "r2d001",
+"r2d002" and "r2d003".
+.le
+.ih
+DESCRIPTION
+Cerro Tololo 2D-Frutti format image data is read from the specified source;
+either a disk file or magnetic tape.
+The 2D-Frutti header may optionally be printed on the standard
+output as either a full listing or a short description.  Image data may
+optionally be converted to an IRAF image of specified data type.
+.ih
+EXAMPLES
+
+1. Convert a 2D-Frutti image tape to a set of IRAF images.
+
+	da> r2df mtb1600 1-999 r2dfile
+
+2. List the contents of a 2D-Frutti tape on the standard output without
+creating an image file.
+
+	da> r2df mtb1600 1-999 r2dfile ma-
+.ih
+SEE ALSO
+t2d, mtexamine, rewind
+.endhelp