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

13.3. DATA CALIBRATION WITH X CIA 107
11. Data / Save / IDL File (my file.xdr)
12. Data / Load / IDL File (my file.xdr)
13. Process / None
14. Flat-field / Auto
15. Process / Selected
16. Use all available functions of View and Tools menu to explore calibrated data.
17. Data / Reload Original Data
18. Flat-field / Manual
19. Process / Selected
20. Use all available functions of View and Tools menu to explore calibrated data.
21. Data / Reload Original Data
22. Flat-field / User Input
23. Process / Selected
24. Use all available functions of View and Tools menu to explore calibrated data.
25. Tools / Hardcopy to create hardcopies.
26. . . .
27. CIA / Quit
Note that once data have been corrected from dark current, glitches and transient effects, it
is necessary to save them in a IDL file (step 13) in order to be able to reload this IDL file (step
14) just after. Indeed, the Data / Reload Original Data commands (steps 19 and 23) permit
to retrieve data in the same state since the last loading (i.e. already dark, glitch and transient
corrected data in that case). Then it make sense to try a new flat-field correction (steps 17, 21
and 25). Note that if Data / Save / IDL File (step 13) is omitted, then data would be retrieved
in the same state after the Data / Load / SSCD command (i.e. raw data) and dark, glitches
and transients effect would be visible in final images.
13.3.3.5 Example 3: data calibration for ‘false beam-switching’
Let’s assume that a 2×1 raster was performed, the first position corresponding to the source
position (“ON source”) and the second one to the background position (“OFF source”). With
such an observing mode – which could be called ‘false beam-switching’ – it is possible to remove
simultaneously the dark current and the background. In that case, data just need to be deglitched
before this operation. Transient correction can first be considered as optional and will be detailed
in Example 4.
Hence, the sequence of commands would be the following:
1. Start a CIA session.