Download ATCOR-4 User Guide, Version 6.2 BETA, February 2012

CHAPTER 5. DESCRIPTION OF MODULES
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Figure 5.58: CAL REGRESS.: radiometric calibration with more than one target
Number of calibration targets: A maximum of 9 calibration targets may be selected. The files
*.rdn should having been calculated beforehand and the need to be calculated consecutively,
e.g., calib1.rdn, calib2.rdn, ...
First *.rdn file: Name of the first *.rdn file of the series to be used for regression
Output Name” Name of the calibration output to be created.
Output:
The output of this program is an ASCII file ”name.cal” with three columns (center wavelength,
c0 , c1 ) where ”name” is specified by the user.
Note: If several calibration targets are employed, care should be taken to select targets without
spectral intersections, since calibration values at intersection bands are not reliable. If intersections
of spectra cannot be avoided, a larger number of spectra should be used, if possible, to increase the
reliability of the calibration.