| Description: This is the average solar flux at the top of the planetary atmosphere (or surface if there is no atmosphere) weighted by the system spectral response of the camera for the image in question. "Inband" means it is limited to the part of the spectrum that is in the passband of the camera, and "fsun" is mathematically written as F subscript sun. The value is in units of spectral radiance, and is calculated by dividing the weighted in-band integrated radiance of the sun by the bandpass of the camera (taking into account filter, zoom, and any other relevant settings). |