Radiometric calibration method and system for lunar remote sensor

A radiometric calibration and remote sensor technology, applied in the field of satellite radiometric calibration, can solve the problems of large environmental impact and inaccurate data acquisition, and achieve the effects of stable reflectivity and smooth spectral curve.

Pending Publication Date: 2021-10-29
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0004] One of the main problems solved by the invention is that the on-orbit calibration method of traditional op

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  • Radiometric calibration method and system for lunar remote sensor
  • Radiometric calibration method and system for lunar remote sensor
  • Radiometric calibration method and system for lunar remote sensor

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Embodiment Construction

[0052] Various exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0053] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0054] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0055] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with referen...

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Abstract

The invention provides a radiometric calibration method and system for a lunar remote sensor. The method comprises the steps: simulating a stationary synchronous orbit satellite, and obtaining J2000 space coordinates of the satellite and the lunar relative to the earth during the in-orbit period at a preset moment; according to J2000 space coordinates and the like, calculating a time point when a complete moon appears in the earth full-disc image; acquiring a corresponding earth full-disk image; restoring the normal proportion of the earth full-disk image; extracting a moon image through a connected domain of the infrared image and the visible light image; eliminating an earth-like image and a moon image which is seriously influenced by stray light from the moon image; according to the moon image after elimination, acquiring moon disc integral irradiance by using A/D conversion; obtaining a distance correction coefficient and a moon phase correction coefficient; and obtaining a relative radiation sequence of the synchronous orbit satellite according to the lunar disc integral irradiance, the distance correction coefficient and the lunar phase correction coefficient. A remote sensing instrument is analyzed through data of a time sequence, so that the attenuation condition of the remote sensing instrument is monitored for a long time.

Description

technical field [0001] The invention relates to the technical field of satellite radiation calibration, in particular to a radiation calibration method and system for a lunar remote sensor. Background technique [0002] The on-orbit calibration of optical remote sensing instruments is a necessary prerequisite for the quantitative application of their observation data. During the in-orbit operation of remote sensing instruments, due to factors such as changes in the relative positions of the various components of the instrument, deposition of volatile materials on optical components, changes in ambient temperature, influence of cosmic radiation, and attenuation of the instrument itself due to vibrations during the launch process, Instrument responsivity determined by pre-launch calibrations may vary during orbital operations by a range of 4-25%. Therefore, remote sensing instruments need to be routinely calibrated on-orbit in order to make the obtained data truly reflect the...

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 刘晨张晶晶
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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