Sensitivity analysis of radiometrical calibration model to system settings based on field imaging spectrometers

Accurate radiometric calibration (RC) of a scientific sensor is of crucial importance in ensuring the credibility of its products or comparing results derived from different sensors or times. It´s found that variations of optional system imaging settings may affect the sensor´s radiometric calibration results. However, previous researches seldom emphasized their influences on current RC models. From this point, this paper conducted sensitivity analyses of the RC model to three key optional system settings referring to the integration time (t), aperture (F) and detector temperature (T) using our newly developed Field Imaging Spectrometer System (FISS). Quantitative determinations of their influences on sensor radiometric coefficients were respectively implemented. Results indicated that the three system settings play important roles in the detector´s radiometric response and change RC coefficients in different ways. Finally, an operational RC model taking into account the sensor´s imaging settings is initially discussed.