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Satellite-borne remote sensor radiation calibration method based on atmospheric parameter remote sensing retrieval

A technology for remote sensing inversion and atmospheric parameters, which can be used in instruments, radio wave measurement systems, etc., to solve problems such as high calibration costs and inability to meet high-frequency calibration requirements.

Inactive Publication Date: 2013-04-03
BEIHANG UNIV
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Problems solved by technology

However, alternative calibration consumes a lot of manpower, material resources and financial resources, and the cost of calibration is high, which cannot meet the needs of high-frequency calibration

Method used

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  • Satellite-borne remote sensor radiation calibration method based on atmospheric parameter remote sensing retrieval
  • Satellite-borne remote sensor radiation calibration method based on atmospheric parameter remote sensing retrieval
  • Satellite-borne remote sensor radiation calibration method based on atmospheric parameter remote sensing retrieval

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Embodiment Construction

[0078] In order to better illustrate a radiometric calibration method for spaceborne remote sensors based on remote sensing inversion of atmospheric parameters involved in the present invention, an on-orbit radiometric calibration of the small satellite imaging spectrometer (HJ1A / HSI) for environmental and disaster monitoring and forecasting was carried out. See figure 1 , a radiometric calibration method for spaceborne remote sensors based on remote sensing inversion of atmospheric parameters in the present invention, the specific implementation method is as follows:

[0079] Step 1: Select the imaging data of the HJ / HSI Dunhuang area at 4:43:26 on August 21, 2010, and select the underlying surface area with a large surface area of ​​uniform type and stable reflection characteristics in the image data as the target area;

[0080] Step 2: Obtain the data of surface albedo in Dunhuang area in summer of 2010;

[0081] Step 3: Obtain the imaging time and observation geometric pa...

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Abstract

The invention discloses a satellite-borne remote sensor radiation calibration method based on atmospheric parameter remote sensing retrieval. The method includes nine steps. A surface reflectance is obtained through ground synchronous actual measurement during satellite crossing or historical data, imaging time and observation geometry parameters are obtained through remote sensing data head files, atmospheric parameters during imaging of synchronous crossing meteorological satellite sensors or related load retrieval remote sensors are utilized, the entrance pupil radiance of the remote sensors is calculated by an atmospheric radiation transmission model according to retrieval results of the atmospheric parameters, a calibration coefficient is calculated through a radiation calibration model, and thereby the on-orbit radiation calibration for a satellite-borne remote sensor is achieved. The satellite-borne remote sensor radiation calibration method based on the atmospheric parameter remote sensing retrieval is a pixel-level calibration method and has the advantages that the accuracy is high, the costs are low, simultaneously, the high frequency calibration can be achieved, historical remote sensing data can be calibrated, and the method has a wide application prospect to remote sensing data processing methods and application technical fields.

Description

technical field [0001] The invention relates to a radiometric calibration method for spaceborne remote sensors based on remote sensing inversion of atmospheric parameters, which belongs to the field of remote sensing data processing methods and application technologies, and is used in the research on on-orbit radiometric calibration technology of spaceborne remote sensors and the quantitative application of remote sensing data aspect is significant. Background technique [0002] In order to meet the needs of the quantitative application of remote sensing satellites, radiometric calibration must be performed on the spaceborne remote sensors to ensure that the data obtained by the remote sensors can truly reflect the characteristics of the observed ground objects and their changing laws. The measurement value (count value or voltage value) output by the remote sensor is converted into absolute radiation amount (radiance or reflectance) through radiation calibration. Only by c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/497
Inventor 周冠华赵慧洁姜禾牛春跃
Owner BEIHANG UNIV
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