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Lunar radiometric calibration system and method for geostationary optical remote sensor

A geostationary orbit and optical remote sensor technology, applied in the field of space remote sensing imaging, can solve the problems of decreased calibration accuracy, inaccurate calibration accuracy, and exceeding the dynamic range of remote sensors, so as to avoid errors and reduce uncertainties

Active Publication Date: 2021-01-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sun calibration has the following disadvantages: the sunlight is too strong, which exceeds the dynamic range of the remote sensor, so the diffuse reflection plate is required to reflect the sunlight, and the diffuse reflection plate is exposed to space radiation for a long time, which is very easy to be polluted and cause performance degradation. Decrease in marking accuracy
In the calibration method of the moon, the near-earth orbit (LEO) orbit is used for the calibration of the moon. Since the remote sensor on LEO uses linear array push-broom imaging, during the calibration process, the camera needs to swing the mirror to align the moon. Push-broom, and the speed of the swing mirror push-broom is related to the position of the earth, which needs to be strictly adjusted in real time, otherwise the image obtained by the push-broom will be distorted, resulting in inaccurate calibration accuracy

Method used

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  • Lunar radiometric calibration system and method for geostationary optical remote sensor
  • Lunar radiometric calibration system and method for geostationary optical remote sensor
  • Lunar radiometric calibration system and method for geostationary optical remote sensor

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specific Embodiment

[0049] see Figure 1-4Shown is the specific embodiment of the geostationary orbit optical remote sensor described in the application to the lunar radiation calibration system, the system includes:

[0050] The first solar panel 1, the second solar panel 2, the satellite body 3, and the calibration device 4, wherein,

[0051] The satellite body 3 includes a first top plate 5 and a first bottom plate 6 oppositely arranged, and a first side plate 7, a second side plate 8, a third side plate 9 and a fourth side plate 10 connected in sequence, and the first top plate 5 It is fixedly connected with the first bottom plate 6 through the first side plate 7, the second side plate 8, the third side plate 9 and the fourth side plate 10;

[0052] The first solar panel 1 is connected with the first side panel 7 of the satellite body 3, and the second solar panel 2 is connected with the third side panel 9 of the satellite body 3; the first solar panel 1 and the second solar panel 2 are cont...

Embodiment 2

[0069] see Figure 5 Shown is an embodiment of a geostationary orbit optical remote sensor calibration method for lunar radiation provided by the application, the method comprising:

[0070] Step 101, preset the calibration orbit, and the calibration orbit is set around the earth;

[0071] Step 102, launching the geostationary orbit optical remote sensor to the lunar radiation calibration system;

[0072] Step 103, when the geostationary optical remote sensor for the lunar radiation calibration system enters the calibration orbit, and when the geostationary optical remote sensor for the lunar radiation calibration system receives the solar panel deployment command, the geostationary optical remote sensor for the lunar radiation calibration system The lunar radiation calibration system expands the first solar panel and the second solar panel;

[0073] Step 104, when the remote sensor in the calibration device receives the radiation calibration command, the calibration device ...

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Abstract

The invention discloses a moon radiation calibration system and method for a geostationary orbit optical remote sensor. The system comprises a first solar panel, a second solar panel, a satellite bodyand a calibration device, and the first solar panel and the second solar panel are located at the two sides of the satellite body respectively. The calibration device is connected with the satellitebody and comprises a second top plate, a second bottom plate, and a fifth side plate, a sixth side plate, a seventh side plate and an eighth side plate which are connected orderly. An observation window is formed in the eighth side plate, and an integrating sphere, a remote sensor and a diffuse reflection plate are arranged in the calibration device. The integrating sphere is located on the innerwall of the second top plate, the remote sensor is located on the inner wall of the second top plate, and the diffuse reflection plate is located on the inner wall of the second bottom plate. According to the present invention, the radiance received by the remote sensor can be known in real time by comparing the radiation intensity of the moon reflected light directly irradiating the integrating sphere with the radiation intensity of the moon reflected light reflected by the diffuse reflection plate.

Description

technical field [0001] The invention relates to the technical field of space remote sensing imaging, in particular to a lunar radiation calibration system and method for a geostationary orbit optical remote sensor. Background technique [0002] Quantification of remote sensing is an important direction for the development of remote sensing information acquisition, processing and application. Weather forecasting, land and resources survey, geological exploration, urban planning and military remote sensing are all inseparable from quantitative applications. The quality of remote sensing quantitative data depends on the measurement accuracy of remote sensors. Before launch, the satellite remote sensor will be calibrated in the laboratory to determine its radiation characteristics, and establish a quantitative relationship between the instrument output and the radiation. However, in the process of satellite transportation and launch, changes in conditions such as random vibrati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/16G01J1/04
CPCG01J1/0411G01J1/0474G01J1/16G01J2001/0481
Inventor 高昆曾超王更科陈小梅杨桦张雍钿陈卓一孔祥皓
Owner BEIJING INSTITUTE OF TECHNOLOGYGY