ISOPHOT-Interactive Analysis (PIA) - A tool for calibration
Carlos GABRIEL
ESA-SAI
José ACOSTA
IAC
Ulrich KINKEL
MPIA
Ulrich KLAAS
MPIK
Bernhard SCHULZ
ESA-SAI
Session ID: P9.07 Type: poster
Abstract:
One of the main purposes of the
PHT-Interactive Analysis, PIA, (see ``The ISOPHOT-Interactive Analysis (PIA),
a calibration and scientific analysis tool'' by the same author, in this
conference) is to help ``calibration scientist'' in performing the calibration
analysis for ISOPHOT, the main photometric instrument on board of ISO.
The task comprises:
- bulk processing of ISOPHOT calibration observations,
- tuning and refining of data reduction algorithms,
- calibration assessment, including derivation of photometric calibration,
study of relevant parameters and their correlations,
- and finally generation of different calibration files
which are then used in automatic data processing and in instrument commanding.
The calibration part forms a separated body within PIA, its design is based on
an interactive frame, in which the calibration strategies have been implemented
taking into account an easy use and fast way to derive and write the
calibration files.
A system of cumulated tables has been developed, which contain all the relevant
calibration data in pre-processed form. Using these tables, the calibration
work is much simplified and new calibration parameters can be derived,
including selection of variables within certain ranges or specific values.
Variables within the individual records can be edited and various
quality flags assigned.
These cumulated tables can be extended, individual records can be replaced or
deleted.
The following calibration procedures have been defined and tackled within
PIA:
- Correction of non-linearities in the Readout electronics
- Recognition and cleaning of glitches
- Dark current evaluation
- Signal Drift modelling (still in progress)
- Photometric calibration
In this poster several of the calibration procedures will be shown and how
they are implemented using the facilites provided by PIA.
Patrick P. Murphy
Wed Sep 11 10:08:00 EDT 1996