A method suitable for outlet type remote sensing satellite infrared short wave load relative radiation correction

Abstract

The invention discloses a method suitable for infrared short wave load relative radiation correction of an outlet type remote sensing satellite. A 90-degree yaw calibration processing method on an on-orbit satellite is used; parameters required by the infrared remote sensing image are generated, include the relative radiation correction coefficient data files of different gains and different spectrum bands for establishing the quantitative relation between the numerical value quantized value of the output signal of each detection unit and the actual target radiation brightness value in the corresponding pixel of the detector, and eliminating the response inconsistency between the detection elements, so as to ensure the reliability and accuracy of the remote sensing data application.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing, and in particular relates to a method suitable for relative radiation correction of infrared short-wave loads of export-type remote sensing satellites. Background technique [0002] For the infrared load carried by remote sensing satellites, comprehensive radiometric calibration must be performed on the output of the instrument and the data obtained before and after launch to ensure the maximum application of the collected data. During the orbiting and on-orbit operation of the satellite, considering that the infrared thermal radiation energy received by the infrared payload is mixed with noise energy, such as the radiation emitted by the background, the atmosphere, and the instrument itself, these will bring great influence to the measurement of the infrared radiation characteristics of the target. Therefore, relative radiation correction for infrared payload data is an i...

AI Technical Summary

Problems solved by technology

[0003] Although the radiation calibration research of the building has been carried out for the satellite infrared payload independently developed by our country, due to the small investment in experimental remote sensing forces in our country, the incomplete types of experimental sites, insufficient interdisciplinary research, weak basic research and other factors, the system has been seriously affected. The development of theoretical and technical originality and full quantification

In terms of radiation site calibration, the Dunhuang Land Calibration Test Site and the Qinghai Lake Water Surface Calibration Test Site have been preliminarily established, and they are respectively aimed at my country's FY-1C, FY-2B meteorological satellites, FY-1D, and HY-1 ocean satellites and CBERS-1 resource satellite and other satellites have carried out off-site calibration method experiments, but due to the number of visits and weather conditions, it is limited to the calibration of some remote sensors, and the calibration methods used are relatively small. Currently, the traditional wavelet The analysis method is the main method. This method mainly takes advantage of the advantages in processing mutation signals. It has relatively large limitations and is far from meeting the needs of practical applications. It directly affects the preprocessing work of satellite data and the production of standard products.

Images