On-orbit Relative Radiometric Calibration Method for Video Satellite Area Array Camera

Abstract

The invention relates to a video satellite in-orbit relative radiation calibration method and particularly relates to a video satellite area-array sensor camera in-orbit relative radiation calibration method in a Bayer template imaging mode. The method comprises steps that firstly, a satellite sensor is employed to calibrate a sensor dark current error for a deep space imaging or night sea imaging mode, secondly, a satellite sensor multi-frame sequence is employed to realize high precision gain calibration of a Bayer area-array sensor for special ground object imaging, and lastly, based on a gain calibration coefficient, the Bayer area-array sensor is utilized to carry out positioning and compensation for abnormal detector cells to realize position detection and compensation processing of the abnormal detector cells. The method is advantaged in that a detector cell response inconsistency problem of the video satellite area-array sensor and a sensor in-orbit response time-independent problem are solved, satellite image radiation quality is improved, and in-orbit relative radiation calibration of the video satellite area-array sensor is realized.

Description

technical field [0001] The invention relates to an on-orbit relative radiation calibration method for a video satellite, in particular to an on-orbit relative radiation calibration method for a video satellite area array sensor camera using a Bayer template imaging mode. Background technique [0002] After more than 30 years of development, my country's aerospace technology has made great progress, and a system of earth observation remote sensing satellites consisting of resources, meteorology, ocean, environment, and national defense series has been formed. Especially under the impetus of the "High Resolution Earth Observation System" national major science and technology project, through innovations in the development of platform sensors, multi-satellite networking, and ground data processing, the spatial resolution and time resolution of my country's remote sensing satellites The rate and data quality have been greatly improved, providing information services and decision ...

AI Technical Summary

Problems solved by technology

Video satellites generally use area array sensors for imaging. Compared with traditional linear array push-broom satellites, the same algorithm is difficult to achieve the radiation calibration accuracy of linear array push-broom satellite sensors; in addition, applications such as dynamic target tracking and trajectory determination of video satellites have a great impact on radiation Calibration accuracy has high requirements

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