Method for calibrating ontrack high-precision optical spectrum of space remote sensing optical spectrum instrument

A spectral calibration and instrument technology, applied in the field of spectral calibration of spectral instruments, can solve the problems of limited spectral lines and low calibration accuracy, and achieve the effects of avoiding uneven distribution, simplifying the calculation process, and ensuring reliability.

Inactive Publication Date: 2012-11-21
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of limited spectral lines and low calibration precision existing in the on-orbit spectra

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  • Method for calibrating ontrack high-precision optical spectrum of space remote sensing optical spectrum instrument

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Embodiment Construction

[0027] The inventive concept of the present invention is to reduce the high-resolution continuous reference spectrum to the spectral resolution of the instrument and match it with the instrument measurement spectrum to obtain the offset of the measurement spectrum when the matching error is the smallest, as the instrument's on-orbit spectrum position amount of change.

[0028] The specific implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] The specific implementation requirements of the space remote sensing spectrometer high-precision on-orbit spectral calibration method of the present invention are as follows: figure 1 The 6 steps shown.

[0030] 1. Establish a continuous reference spectrum R(λ), and normalize the instrument slit function f slit (λ), and then calculate the continuous reference spectrum R′(λ) reduced to the spectral resolution of the instrument.

[0031] The high-resoluti...

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Abstract

The invention relates to a method for calibrating ontrack high-precision optical spectrum of a space remote sensing optical spectrum instrument, which comprises the following steps: step I, constructing a dispersed reference spectrum R'(j); step II, carrying out amplitude approach on a measured optical spectrum L(j) of the instrument and the reference optical spectrum R'(j) to obtain the revised measured optical spectrum L'(j) of the instrument; and step III, comparing the reference optical spectrum R'(j) with the revised measured optical spectrum L'(j) to obtain offset of the instrument ontrack optical spectrum position. By virtue of the method for calibrating ontrack high-precision optical spectrum, no extra calibration device is needed to be increased; the reliability of the instrument is ensured; the continuous reference optical spectrum with high resolution is taken as the standard to avoid the disadvantages of the other ontrack optical spectrum calibrating methods that the spectral line quantity is small, and the distribution is not even; the optical spectrum calibrating precision is effectively improved, thus the reliability and the precision of the ontrack detecting data of the space remote sensing optical spectrum instrument can be ensured.

Description

technical field [0001] The invention belongs to the technical field of spectral calibration of spectroscopic instruments, and relates to a method for on-orbit high-precision spectral calibration of space remote sensing spectroscopic instruments. Background technique [0002] Since the spectral position of the spectrometer directly affects the measurement results of its spectral responsivity, the laboratory spectral calibration is carried out before the launch of the space remote sensing spectroscopic instrument, especially before the calibration of the spectral responsivity. However, in order to correct the shock vibration during satellite launch and the impact of the harsh space environment in orbit, the spectrometer must carry out on-orbit spectral calibration and wavelength accuracy monitoring during the on-orbit operation to improve the on-orbit spectral accuracy, so that It enables spectroscopic instruments to provide high-precision and valuable detection data to achiev...

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Application Information

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IPC IPC(8): G01J3/28
Inventor 王淑荣李占峰黄煜
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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