Working in high latitudes involve low sun zenith angle, including many observations in the range of 60 to 70 degrees. The actual version of HyperCP is limited to 60° due to Zhang et al (2017) LUT. Even when choosing Mobley 1999, Zhang LUT is used to compute the uncertainty. I suggest relaxing this limit by forcing the use of SZA = 60 for the LUT interpolation in that particular case. I agree that 60 still be the limit when Z17 is requested for the sky/sun glint correction.
Simon Bélanger
Working in high latitudes involve low sun zenith angle, including many observations in the range of 60 to 70 degrees. The actual version of HyperCP is limited to 60° due to Zhang et al (2017) LUT. Even when choosing Mobley 1999, Zhang LUT is used to compute the uncertainty. I suggest relaxing this limit by forcing the use of SZA = 60 for the LUT interpolation in that particular case. I agree that 60 still be the limit when Z17 is requested for the sky/sun glint correction.
Simon Bélanger