How to generate reflectance values for calculating agricultural indices (NDVI..) using simultaneous upwelling and downwelling irradiation measurments?

I have 2 spectrometers calibrated for irradiation working between 350-1050 nm. I use these to measure simultaneous up-welling and down-welling irradiance measurements at various agricultural...

06 June 2016 4,330 4 View