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

112 CHAPTER 13. DATA CALIBRATION
13.4.3 calib bs
The BS PDS is calibrated with calib bs. Again it is called in a very similar manner to
calib raster. Like calib raster, calib bs does create a MOSAIC image – though in this
case this is simply the difference between the on source field and the reference field.
• As with the other calibration routines you specify the general calibration treatments, e.g:
CIA> calib_bs, bs_pds, deglitch=’tcor’, /dark, flat=’calg’, $
CIA> stab=’s90’
• Then to create the beam-switch MOSAIC you set the keyword bs.
CIA> calib_bs, bs_pds, /bs
Of course, as in the calib raster examples, all the keywords can be set at one call of
calib bs.
• For compatibility reasons, the beam-switch MOSAIC is stored in the field .RASTER. To
view the result of your calibration you can use x3d and xsnr, orsimply.
CIA> tviso, bs_pds.raster
13.4.4 calib struct
The general PDS is calibrated with calib struct. This is in fact the same routine that calibraster
calls to do calibration on a raster PDS. The main difference between the routines is that
calib raster has the additional capability to create a raster MOSAIC. Read Section 13.4.1,
keeping the following points in mind.
• As when using calib raster you specify the type of calibration you want, though of course
there is no keyword raster with calib struct, e.g:
CIA> calib_struct, staring_pds, deglitch=’tcor’, /dark, flat=’calg’, $
CIA> stab=’s90’
• Similarly, you can also use x3d and xsnr to look at your resulting data. However, there is
no MOSAIC in a general PDS to view.