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

13.3. DATA CALIBRATION WITH X CIA 105
• Subtract the user’s own dark current frame (an IDL 32 × 32 array called my dark in the
following).
• Use the spatial deglitch method.
• Correct transient effects using the SAP model fitting.
• build flat-field by selecting a few frames of the raster (if no assumption on the extension
or intensity of sources can be done).
Then the sequence of commands would be the following:
1. Start a CIA session.
2. Start x cia with the following:
CIA> x_cia, indark=my_dark
3. Choose AOT Type (default is raster scan).
4. Data / Load / SSCD
5. Data / AOT Info
6. Dark / User Input
7. Deglitch / Spatial
8. Transient / SAP Model Fitting
9. Flat-field / Manual
10. Process / Selected
11. Use all available functions of View and Tools menu to explore calibrated data.
12. Tools / Hardcopy to create hardcopies.
13. Data / Save / IDL File (If result is worth saving.)
14. CIA / Quit
13.3.3.3 Processing several data calibration methods in a single session
The PDS contains two fields in which calibrated data are stored: .CUBE (computed IMAGEs)
and .IMAGE (reduced EXPOSUREs per raster position, per CVF wheel position or per filter).
The PDS field .MASK (which has the same size as .CUBE) is flagged to 1 for all pixels containing
a bad value (glitch, not stabilised or dead pixel) or for ‘slewing frames’ (during which the OTF
was off). For the raster PDS, the additional field .RASTER is built from .IMAGE and contains
the constructed raster map.
Dark correction updates the .CUBE of the PDS, and glitch and transient corrections update
both .CUBE and .MASK of the PDS. Then .CUBE can be averaged into .IMAGE, excluding
all bad pixel values flagged in .MASK. This averaging operation is optional but is performed