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

306 APPENDIX A. GLOSSARY
beam-switch (observation) Also AOT#3: an observation where CAM alternates pointings
on a target object with pointings on the selected fields of ‘empty’ sky surrounding the
object. The ’empty’ sky fields are known as the reference fields. There can be up to four
reference fields in such an observation.
beam-switch structure See PDS.
calibration data Calibration data refers to data such as flat fields, DARK images etc. For the
user this is synonymous with CAL-G data.
calibration data structure The calibration data structure (CDS) is the CIA data structure
which is used to hold calibration data.
CAL-G 1 General term referring to CAM calibration data products. Note that in the CIA
User’s Manual the terms CAL-G and calibration data are synonymous. In CIA, CAL-G
files are converted to Calibration Data Structures (CDSs) and the user does not work
directly with them.
calibration data Refers to flat field images, dark images etc.
CAMTU CAM Time Unit. 1 CAMTU = 0.14000498 seconds.
CDS Calibration Data Structure. A CIA data structure for holding CAL-G data products. See
entry for CAL-G.
CCIM CAM Calibrated IMage. An AAR level data product containing AA computed EXPO-
SUREs in detector coordinates. It is also a field in an SAD used to hold data from the
CCIM data product or CIA processed data.
CGLL CAM Glitch List. An AAR level data product containing a list of AA detected glitches.
CIA user-friendly format A term referring to the manner in which CAM parameters are
presented in the CIA data structures.
CIDT CAM Instrument Dedicated Team. Located in VilSpa, its main tasks were to monitor
and calibrate ISOCAM.
CIER CAM Instrument Edited Raw data, i.e. edited telemetry data. An ERD level data
product containing EOI and RESET frames. CISP or CIER can be the input data for
CIA analysis.
CISP CAM Instrument Standard Processed data. A SPD level data product containing IM-
AGES computed by AA from CIER data. CISP or CIER data can be the input data for
CIA analysis.
CIST CAM Instrument Support Team. Located in Saclay and Orsay (France), it supported
the CIDT during the mission.
CJAM CAM Jitter And Memory. Also contains stabilization information. This is an AAR
level data product.
CLEAN See OP-MODE.
1 See the ISOCAM Handbook for more information on CAL-G data products.