On-orbit calibration device and method for infrared sea temperature camera on double satellites

Abstract

The invention discloses an on-orbit calibration device and calibration method for an infrared sea temperature camera on double satellites, and belongs to the technical field of satellite optical remote sensors. The on-orbit calibration device comprises a mounting bottom plate, a stepping motor, a rotating bearing seat, a rotating shaft, a calibration black body support, a high constant temperature calibration black body, a low constant temperature calibration black body and an infrared sea temperature camera main body; one end of the rotating shaft is matched with the stepping motor to be mounted on a light path of the infrared sea temperature camera main body, and is fixedly mounted on the mounting bottom plate through the rotating bearing seat; the other end of the rotating shaft is fixedly connected with the calibration black body support; and the two ends of the calibration black body support are respectively provided with a high constant temperature calibration black body and a low constant temperature calibration black body, a calibration rotating shaft is parallel to a camera main body installation surface. Double lenses are taken as a center line, double-lens calibration is realized through rotation, the execution action is few, and the test efficiency is high. According to the calibration method, the temperature of the high and low constant-temperature calibration black body can be determined according to the sea temperature characteristics, the two groups of infrared lenses are calibrated respectively, and the imaging effect of the optical component is adjusted in time.

Description

technical field [0001] The invention belongs to the technical field of satellite optical remote sensors, and in particular relates to an on-orbit calibration device and calibration method for an infrared sea temperature camera on a double satellite. Background technique [0002] During launch and in-orbit operation of a satellite, the performance of its optical, structural and electronic components will change, resulting in a change in the relationship between the digital output and the radiance established by the laboratory calibration. In order to obtain accurate image data, these changes must be corrected, which requires on-board calibration of sensors based on laboratory calibration. [0003] On-board infrared calibration uses the calibration black body as a standard part to evaluate the radiation optical characteristics of the remote sensor itself in real time, and to discover and correct the changes in the radiation response of the remote sensor in time, which is an in...

AI Technical Summary

Problems solved by technology

[0005] Based on the above problems, the present invention provides an on-orbit calibration device and calibration method for an infrared SST camera on a double star, which solves the problem that when the dual lens is calibrated, the rotation of the single lens is performed separately due to the fact that the rotation axis is perpendicular to the installation plane of the camera body. The high and low temperature black body test requires many actions and low test efficiency. The content of the present invention is as follows:

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