Comments on the intercalibration of multisensor, multitemporal, multichannel digital radiance data

When comparing the recorded radiance data obtained on a given date by means of different sensors or on different dates using the same sensor, the values in question must be referred to some common datum. It is presently noted that more data are required for remote sensing instruments, and that these should consist of gain, offset, spectral response and point spread function for each bandpass. Such information will be the bases for studies of sensor intercalibration procedure.