Detector-Based Absolute Radiation Traceability Method in Radiation Calibration

Optical radiation is the basic carrier of optical remote sensing information. The geometry and spectral resolution capabilities of optical remote sensors on various satellite platforms are directly related to their ability to accurately measure optical radiation. At present, in the application of space optical remote sensing detection, users are not satisfied with judging the presence or absence of targets, but also solve more elaborate problems. Researchers have been committed to the research of high-precision radiation calibration and standard transmission technology, so as to realize the accurate inversion of the quantitative characteristic parameters of ground targets and environments from optical radiation data, and establish corresponding identification and measurement numerical models. The radiation standard transfer chain generally includes two categories, one is based on blackbody radiation sources, and the other is based on cry-radiometers and photo-detectors. In this paper, the basic methods of the above two radiation standard transfer chains are described and compared and analyzed.