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

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OFLT Optical FLaT-field.
OLP Off Line Processing (also known as the pipeline).
OP-MODE Operational Mode. CAM can be operating in one of several modes:
IDLE CAM is idle.
OBS performing an astronomical observation.
DARK obtaining a dark frame.
FLAT obtaining an internal flat-field image.
CLEAN executed to remove saturation remnants from the detector.
WAIT CAM is waiting for a good CONFIGURATION.
An OP-MODE may be comprised of one or more STATEs. (See CONFIGURATION and
AOT.)
ORBIT A CAL-G file containing information on orbital parameters for all ISO revolutions up
to and at the very least including the revolution during which your AOT is performed.
origin SAD A flavour of SAD containing which contains an EXPOSURE one from each of the
CCIM and CMAP data products, or similarly CIA processed data. Also may contain a
glitch list, a point source list or jitter information.
OSN Observation Sequence Number. Identifies an AOT within a TDT. See also .
OTF On Target Flag. OTF=1 indicates that CAM is looking at the proposed target. When
OTF=0, then CAM is off target. Each IMAGE has its own OTF value.
When slicing your data, you have a choice of slicing by our OTF, or just OTF. The former
means that you take 143 as the good value of the QLA flag and the latter means you take
7 as a good value. The criteria for deciding if CAM is on target are stricter for the latter
than for the former. See also QLA flag.
PDS Prepared Data Structure. Three flavours exist: a CVF PDS, a raster PDS (also known as
a raster data structure), a beam-switch PDS and a general PDS. These data structures are
created from an SSCD with one of the routines get sscdcvf, get sscdraster, get sscdbs
and get sscdstruct respectively. They are used to hold all the sliced (i.e. prepared) data
that you need to perform normal calibration. Usually, the data in a PDS corresponds to
a single CONFIGURATION.
pipeline (processing) refers to the OLP processing that creates the ERD, SPD and AA data
products delivered on an ISO CD-ROM or retrieved from the IDA.
PMA Post Mission Archive. See IDA.
polarization (observation) See AOT#5.
QLA flag Quick Look Analysis flag. Originally, this was a telemetry flag, but in CIA it is
redefined as a combination of the original QLA flag, the original OTF flag and the OTFsum
flag. What this all actually means is that the QLA flag has two values which may be
taken to indicate a good FRAME: 7 or 143. Both of these indicate the CAM is on target,
but the latter is a stricter criterion than the former. See also OTF.