Auxiliary Data Files for Smile Correction

The BEAM Smile Correction processor uses three different sets of auxiliary data files for processing. All of them are flat text files:

1. band_info.txt
2. central_wavelen_fr.txt for MERIS L1b FR and central_wavelen_rr.txt RR products.
3. sun_spectral_flux_fr.txt for MERIS L1b FR and sun_spectral_flux_rr.txt RR products.

band_info.txt

This file contains a header line followed by 15 lines associated with each MERIS band. The header line explains the parameters contained in this file. The columns are theoretical band wavelength in nmsolar spectral flux in LU for the theoretical band wavelength

1	band	the one-based band index (ignored)
2	switch_land	whether or not to perform reflectance correction over land
3	lower_land	lower, one-based band index to be used for correction over land
4	upper_land	upper, one-based band index to be used for correction over land
5	switch_water	whether or not to perform reflectance correction over water
6	lower_water	lower, one-based band index to be used for correction over water
7	upper_water	upper, one-based band index to be used for correction over water
8	lam_theo
9	E0_theo

The Smile Correction Processor always ignores the header line and the first column.

central_wavelen_fr.txt / central_wavelen_rr.txt

This files contain a header line followed by 3700 (FR) resp. 925 (RR) lines associated with each detector containing the zero-based detector index in the first column and the central wavelengths (in nm) for each MERIS band.
The Smile Correction Processor always ignores the header line and the first column.

sun_spectral_flux_fr.txt / sun_spectral_flux_rr.txt

This files contain a header line followed by 3700 (FR) resp. 925 (RR) lines associated with each detector containing the zero-based detector index in the first column and the solar spectral fluxes (in LU) for each wavelength for each MERIS band.
The Smile Correction Processor always ignores the header line and the first column.