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ridsfile noao.mtlocal



ridsfile -- convert DUMPF format IDSFILE to IRAF images


ridsfile dumpf_file file_number iraf_file


The dumpf data source, i.e., the name of a magtape device.
The ordinal of the DUMPF permanent file containing the IDSFILE to be read. A listing of permanent files on the DUMPF tape can be obtained with the ldumpf task.
The IRAF file which will receive the data if the make_image parameter is set. If multiple records are being read, the output filename is concatenated from this parameter and the IDS record number. That is, images with these names would be created if iraf_file = "ids": ids.1001, ids.1002, ids.1003, ..., ids.2001, ids.2002, ..., ids.3001 ....
record_numbers = "1001-9999"
A string listing the IDS records to be read from the IDSFILE.
make_image = yes
This switch determines whether the IDS records are converted to IRAF images. When make_image = no, only a listing of the headers is produced, no output image is written.
print_pixels = no
When this parameter is set to yes, the values of the ids pixels are printed.
long_header = no
This parameter determines whether a long or short header is printed. When long_header = no, a short header is printed. The short header contains only the record number and ID string; the long header contains all information available including the RA, Dec, HA, ST, UT, reduction flags, airmass, integration time, starting wavelength and wavelength per channel information.
data_type = "r"
The data type of the output IRAF image. If an incorrect data_type or null string is entered, the default data type real is used.


The IDS records in an IDSFILE are read from a Cyber DUMPF tape and optionally converted to a sequence of one dimensional IRAF images. The records to be read from the IDSFILE can be specified. The IDS header information is printed in either a short or long form. The pixels values can be listed as well.


[1] Convert all records in the IDSFILE to IRAF images, with the root image name being "aug83". From running task LDUMPF, it is known that the IDSFILE is the fourth permanent file on the DUMPF tape. The DUMPF tape is mounted on mtb.

cl> ridsfile mtb 4 aug83

[2] List the headers from the same IDSFILE read in example 1, but don't make output images. A long_header will be listed; sample output is shown.

cl> ridsfile mtb 4 make_image=no long_header=yes

RECORD = 2317, label = "CALLISTO  2297/2298  CLEAR/2.5ND",
oflag = OBJECT, beam_number = 0,   alpha_ID = NEW,   companion = 2318,
airmass = 1.524,        W0 = 3430.735,    WPC = 1.032,      ITM = 960,
NP1 = 0, NP2 = 1024,    UT = 3:36:20.0,    ST = 15:36:43.0,
HA = 1:39:48.5,         RA = 13:56:55.5,  DEC = -10:42:37.1,
df = -1, sm = -1, qf = -1, dc = 0, qd = 0, ex = 0, bs = 1, ca = 0, co = -1

[3] Print the pixel values for records 5086 and 5087. No output image will be written, and only the short header listed. Again, the IDSFILE is the fourth permanent file on the DUMPF tape, which is mounted on mtb.

cl> ridsfile mtb 4 make_im- rec=5086,5087 print+


The current version of IRAF magtape I/O does not read beyond the first volume of a multivolume tape.
The record structure of a DUMPF tape is used to filter out noise records and extraneous bits that fill out a tape byte; this tape structure information is lost when the tape is copied to disk, and so ridsfile may not be able to convert some DUMPF format disk files.
Task ridsfile allows for converting only one IDSFILE per execution. If you wish to read more than one IDSFILE from a DUMPF tape, ridsfile must be executed more than once.


The Cyber format readers, including ridsfile , have not been implemented on SUN/IRAF and AOS/IRAF.


ldumpf, ridsout, ridsmtn

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