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A Field Spectral Calibration and Radiometric Calibration Method for Field Hyperspectral Irradiance Meter

A spectral irradiance and spectral calibration technology, which is applied in photometry, optical radiation measurement, photometry using electric radiation detectors, etc., can solve the problems of long distances, manpower, material resources and other costs that cannot be ignored, and long time periods And other issues

Active Publication Date: 2020-12-25
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

If the equipment is transported back to the laboratory for re-calibration, the journey is far away, the time period is long, and the cost of manpower and material resources cannot be ignored.

Method used

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  • A Field Spectral Calibration and Radiometric Calibration Method for Field Hyperspectral Irradiance Meter
  • A Field Spectral Calibration and Radiometric Calibration Method for Field Hyperspectral Irradiance Meter
  • A Field Spectral Calibration and Radiometric Calibration Method for Field Hyperspectral Irradiance Meter

Examples

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Embodiment Construction

[0058] The maintenance personnel use the portable on-site wavelength transfer etalon 3 and the on-site radiation transfer etalon calibrated by the metrology laboratory at the work site of the field hyperspectral irradiance, and complete the mobile transfer of the laboratory spectrum and radiation standards through on-site measurement, and then realize On-site spectral calibration and radiometric calibration of field hyperspectral irradiance meters. The specific process is as follows: In clear and cloudless weather, at a suitable time period, the on-site maintenance personnel carry the on-site radiation transfer etalon, on-site wavelength transfer etalon and auxiliary equipment to the site to be on duty for the equipment to be calibrated, and the maintenance personnel first use the on-site wavelength The transfer etalon replaces the shading device on the field hyperspectral irradiance meter.

[0059] Such as figure 1 , 6 As shown, an on-site spectral calibration and radiometr...

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Abstract

The invention discloses an onsite spectrum scaling and radiation scaling method of a field hyper-spectral irradiance instrument. According to the method, a wavelength standard plate which serves as areflectivity reference in a metering lab serves as an onsite wavelength transmission etalon, and a reference plate which serves as reflectivity calibrating device in the metering lab and a portable spectrum radiometer which serves as a radiation reference in the metering lab serve as an onsite radiation transfer etalon. In sunny day, direct sunlight serves as an illumination light source in an equipment operation site, the spectral irradiance of the direct sunlight is measured practically and compared, and the onsite spectrum and radiation of equipment are scaled. The method can be used to provide a practical technical means for onsite scaling of high / hyper-spectral equipment which operate automatically in the field, and has significance in the meteorology field as well as in the field ofin-orbit radiation scaling of satellite remote sensors.

Description

technical field [0001] The invention relates to the technical fields of optical radiation measurement, satellite remote sensor calibration and meteorology, in particular to an on-site spectrum calibration and radiation calibration method for a field hyperspectral irradiance meter. Background technique [0002] The field hyperspectral irradiance meter is a professional equipment used for the measurement of global spectral irradiance, sky diffuse spectral irradiance, and direct solar spectral irradiance. have important applications in the field. [0003] In the on-orbit calibration of satellite remote sensors, it is necessary to measure the surface reflectance, surface received irradiance or surface radiance in the external field (generally select a dedicated radiation correction field) at the time when the satellite is over the top. Through the atmospheric radiation transfer model , which is retrieved to the satellite entrance pupil radiance, realizing the on-orbit substitut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/04G01J1/42
CPCG01J1/04G01J1/4204
Inventor 翟文超李新郑小兵张艳娜刘恩超张权潘琰闫静
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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