582 
mwzoT]wmx 
1.0 
0.8- 
0.6- 
0.4- 
0.2- 
0.0- 
WAVELENGTH 
(0.005 - MICROMETER GRID) 
MICROMETERS FROM PEAK 
Figure 1. Ad-hoc bandpass profile used for the 
relative spectral response profiles of the ASAS 
channels. The grid spacing is 0.005 micrometers 
for use in the 5S code and there is no central 
peak value because the ASAS band centers are 
located between grid wavelengths in the relevant 
part of the spectrum. 
Figure 3. Bandpass filters used to degrade the 
spectra in Figure 4, at 0.005 micrometer 
resolution, to spectral resolutions of 0.01, 0.02, 
0.03, and 0.04 micrometers. Because of symmetry 
about the peak filter value, only half of each 
bandpass filter is shown. The spectral resolution 
is defined as the full width at half-maximum. 
WAVELENGTH (MICROMETERS) 
Figure 2. Results of surface reflectance retrieval from ASAS data. The different cases are discussed 
in the text.