A method for on-orbit radiation calibration of a space extreme ultraviolet solar telescope
A solar telescope and radiation calibration technology, which is applied in the field of on-orbit radiation calibration of space extreme ultraviolet solar telescopes, can solve the problems of low calibration accuracy, attenuation of radiation response performance in orbital work, incapability of high-precision quantitative remote sensing observation of the sun, etc. problem, to achieve the effect of optimizing technological innovation, light weight and simple structure
Active Publication Date: 2022-05-17
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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[0004] The purpose of the present invention is to provide an on-orbit radiation calibration method for space extreme ultraviolet solar telescopes to solve the problems of low ground radiation calibration accuracy and attenuation of on-orbit working radiation response performance existing in existing extreme ultraviolet band solar imaging instruments. The technical problem of not being able to conduct high-precision quantitative remote sensing observations of the sun
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[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0041] The on-orbit radiation calibration method of the space extreme ultraviolet solar telescope of the present invention adopts the method of configuring the total illuminance calibration channel of the working band along with the space extreme ultraviolet solar telescope to realize high-precision on-orbit radiation calibration of the sun.
[0042] A method for calibration of space extreme ultraviolet solar telescope on-orbit radiation of the present invention, the specific process is as follows:
[0043]Step 1. Design of solar EUV illuminance calibration channel 3
[0044] The principle of on-orbit radiometric calibration is as follows: figure 1 As shown, a set of solar EUV illuminance calibration channel 3 with the same spectral characteristics as the space EUV solar telescope 2 is designed. The structure of a typical solar EUV illuminance calibration c...
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An on-orbit radiation calibration method for a space extreme ultraviolet solar telescope, relating to the field of extreme ultraviolet telescope radiation calibration, including designing a solar extreme ultraviolet illuminance calibration channel; ground illuminance response calibration of the solar extreme ultraviolet illuminance calibration channel; space extreme ultraviolet After the solar telescope is launched into orbit with the satellite, it regularly uses the solar extreme ultraviolet illuminance calibration channel to perform on-orbit radiance calibration; the extreme ultraviolet illuminance calibration channel can calibrate the sun's extreme ultraviolet light at the entrance of the extreme ultraviolet solar telescope during on-orbit calibration. Irradiance, using this data, the uniformity distribution data of the telescope image plane obtained by on-orbit flat-field calibration, and the image grayscale data of the sun, can calibrate the radiance responsivity of each pixel of the image plane detector in the extreme ultraviolet solar telescope. The invention has high radiation calibration precision, small volume and weight, and good space applicability, and can carry out high-precision on-orbit radiation calibration for the space solar extreme ultraviolet camera, satisfying the high-precision quantitative remote sensing observation of the sun in the extreme ultraviolet band.
Description
technical field [0001] The invention relates to the technical field of extreme ultraviolet telescope radiation calibration, in particular to an on-orbit radiation calibration method for a space extreme ultraviolet solar telescope. Background technique [0002] As the main source of energy for the earth, the sun's changes directly affect space weather and global climate change, while intense solar activity events such as flares and coronal mass ejections are the main factors leading to space weather anomalies. At present, extreme ultraviolet (EUV) band imaging is the main means of observing the solar transition zone and the corona, which can obtain information about solar flares, coronal mass ejections, etc., make early forecasts of solar activities, warn of disastrous space weather events, and provide space weather data Products that serve human space activities and national defense construction. [0003] In order to accurately retrieve imaging data, solar extreme ultraviol...
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IPC IPC(8): G01J1/42G01J1/08
CPCG01J1/429G01J1/08G01J2001/086Y02A90/10
Inventor 何玲平陈波丁广兴毛石磊
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI