ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

308 APPENDIX A. GLOSSARY
FITS (data products) The data products on the CD-ROM are in the form of FITS files, the
actual CAM image being stored in a binary extension of the FITS file.
FLAT A flat-field image. For CAM this is the product of an OFLT and a DFLT (see glossary
entries for both of these terms.) Also an OP-MODE when CAM is performing an internal
flat-field measurement.
FRAME FRAME, when written in upper-case in the CIA User’s Manual, refers to a single
CAM CCD read-out. There are two possible FRAMEs: EOI or RESET. (See also MOSAIC
and EXPOSURE.)
future SAD A flavour of SAD which may contain a MOSAIC either taken from the CMOS
data product or computed with CIA from EXPOSUREs. It may also contain spectra.
IDA ISO Data Archive. Archive of ISO data products at Villafranca which is accessible over
the internet (http://www.iso.vilspa.esa.es).
IDLE See OP-MODE.
IIPH Instrument Instantaneous Pointing History. Contains instantaneous pointing information
for the prime instrument during an AOT. For most users with CAM data, CAM is always
prime.
IRPH Instrument Reference Pointing History. Contains reference pointing information for the
prime instrument during an AOT. For most users with CAM data, CAM is always prime.
IMAGE Refers to an image computed from the EOI and RESET FRAMES. In theory, IMAGE-
=EOI-RESET. For the CAM LW detector this is indeed true, but for the SW detector it
is slightly more complicated and CCD lines have to be interleaved. (see MOSAIC.)
micro-scan (observation) A particular CONFIGURATION of CAM AOT#1. This is a special
case of a raster observation with a small pointing step size so that EXPOSUREs
greatly overlap.
MOSAIC Refers to the final image from an AOT. It is computed from the EXPOSUREs,
which are in turn computed from IMAGEs, which are computed from the RESET and
EOI FRAMEs. (See glossary entries for an explanation of each of these terms.)
M-direction M-direction and N-direction are the axes along which CAM performs a raster.
N-direction See M-direction.
observation data (structures) A broad term that refers to all the data products you need
to make up uncalibrated CAM IMAGEs. In other words, it excludes calibration data.
The observation data structure is any structure holding such data (see SCD, SSCD, SAD,
SSAD).
observing mode OP-MODE when CAM is obtaining observation data. Also abbreviated as
OBS.
OBS see observing mode.
official name Refers to the full name of a data product or CIA data structure.