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Method and device for correcting calibration coefficient of backscattering coefficient

A technology of backscattering coefficient and backscattering, which is applied in measuring devices, electrical digital data processing, special data processing applications, etc., and can solve problems such as drift of observation values

Active Publication Date: 2017-05-31
NAT SATELLITE OCEAN APPL SERVICE
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Problems solved by technology

[0003] When the backscatter coefficient in the satellite active microwave remote sensor observation data is used to extract the wind field, the backscatter coefficient requires high accuracy, but with the prolongation of the working time of the active microwave remote sensor, after a period of time, The observed value of the instrument will drift with time, so it is necessary to periodically correct the calibration coefficient of the active microwave remote sensor to correct the deviation

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  • Method and device for correcting calibration coefficient of backscattering coefficient
  • Method and device for correcting calibration coefficient of backscattering coefficient
  • Method and device for correcting calibration coefficient of backscattering coefficient

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no. 1 example

[0025] The first embodiment of the present invention provides a method for correcting the calibration coefficient of the backscatter coefficient, which is used for correcting the calibration coefficient of the backscatter coefficient of the satellite active microwave remote sensor. The sea radar backscatter coefficient calculated by the composite radar model is linearly fitted with the observed backscatter coefficient to obtain the linear fitting coefficient, and the calibration coefficient is corrected according to the linear fitting coefficient. See figure 2 , the correction method of the calibration coefficient of the backscattering coefficient comprises:

[0026] Step S110: establishing a composite radar backscattering model that combines the microwave two-scale backscattering model and the geometrical optics model.

[0027] Specifically, see image 3 , the step S110 includes:

[0028] Step S111: Establishing a co-polarized sea surface local normalized scattering inter...

no. 2 example

[0076] The second embodiment of the present invention provides a backscatter coefficient calibration coefficient calibration device 200 for calibrating the backscatter coefficient calibration coefficient of a satellite active microwave remote sensor. See Figure 4 The device 200 for correcting the calibration coefficient of the backscatter coefficient includes: a model building module 210 , a calculation module 220 , a linear fitting module 230 and a correction module 240 . Wherein: the model building module 210 is used to establish a composite radar backscattering model combined with a microwave two-scale backscattering model and a geometric optics model; data and buoy measured data to calculate the sea surface radar backscatter coefficient, the satellite observation data includes the observed backscatter coefficient; the linear fitting module 230 is used to combine the sea surface radar backscatter coefficient with the observed backscatter coefficient Carry out linear fitti...

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Abstract

The invention provides a method and a device for correcting calibration coefficient of backscattering coefficient, is used for correcting the calibration coefficient of the backscattering coefficient of a satellite active microwave remote sensor and relates to the field of marine microwave sensing data processing. The method includes: building a combined radar backscattering model combining a microwave two-scale backscattering model with a geometric optical model; calculating to acquire sea surface radar backscattering coefficient according to the combined radar backscattering model, satellite observation data and buoy measured data, wherein the satellite observation data include observation backscattering coefficient; performing linear fitting on the sea surface radar backscattering coefficient and the observation backscattering coefficient to acquire linear fitting coefficient of the observation backscattering coefficient and the sea surface radar backscattering coefficient; correcting the calibration coefficient of the backscattering coefficient of the satellite active microwave sensor according to the linear fitting coefficient to enable the calibration coefficient to be more accurate.

Description

technical field [0001] The invention relates to the field of marine microwave remote sensing data processing, in particular to a calibration coefficient calibration method and device for backscattering coefficients. Background technique [0002] The ocean surface wind field is an active factor affecting waves, currents, and water masses, and a basic parameter of ocean dynamics. The detection of the global ocean wind field is used in disaster prevention and mitigation in coastal areas, marine environmental protection, and promotion of ocean-related scientific research. is of great significance. Active microwave remote sensors carried by satellites, such as microwave scatterometers and radar altimeters, have become very important observation methods for ocean surface wind fields due to their advantages of all-day, all-weather, high temporal and spatial resolution, and coverage. [0003] When the backscatter coefficient in the satellite active microwave remote sensor observati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G01N22/00
CPCG01N22/00G06F30/20
Inventor 林明森叶小敏彭海龙徐莹
Owner NAT SATELLITE OCEAN APPL SERVICE
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