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CAL-REGRESS Error Not Enough Valid Points
I'm trying to run a 3-targets inflight calibration on some CASI/SASI hyperspectral data. Targets are a black tarp, an asphalt and a bright gray tarp.
I have airborne at-sensor radiance (1-10000 range) and ground target reflectance (0-1 range). Target reflectance has been spectrally resampled to the airborne sensor.
I've run the c1 inflight calibration over the 3 targets obtaining the various *.cal, *.adj and *.rdn files that have been renamed sequentially (calib1, calib2, etc.).
Still, when I try to run the CAL-REGRESS module it stops with the following error: "PLOT: Not enough valid and unique points".
I've checked the various files and they seem to have been written normally. My only guess, by checking the *.adj files, is that there's a rounding problem.
In the *.adj file, target reflectance is converted to percentage with precision 1 only and this yield bands with the same reflectance value within the same target. For example, the black tarp has all reflectance values equal to 4.5% between 550 and 830 nm.
The original spectrally resampled reflectance, though, had 7 digits precision and the values were not at all identical between the various bands.
Could this be the problem? What can I do to address this?
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