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Quantitative sea surface wind detecting method

A sea surface wind field and vector technology, applied in the fields of earth science, remote sensing and meteorology, can solve the problems of large amount of data, unable to realize algorithm expansion, affect the efficacy of new scatterometer, etc., and achieve the effect of rapid inversion

Active Publication Date: 2018-12-11
NAT SPACE SCI CENT CAS
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Problems solved by technology

However, the amount of data obtained during the observation process is also larger than that of conventional scatterometers, and conventional methods cannot be used to quickly and effectively extract information, which affects the efficacy of this new type of scatterometer
For the space-borne sector-shaped rotary scanning scatterometer, the expansion of the algorithm cannot be realized, which affects the application expansion of the real-time processing on the star
At present, there is no method for wind field inversion for spaceborne fan-shaped rotating scanning scatterometer

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  • Quantitative sea surface wind detecting method

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Such as figure 1 Shown, a kind of method of quantitative detection sea surface wind field, described method comprises:

[0021] Step 1) Obtain the measured value of the backscatter coefficient by using the fan beam rotating scanning scatterometer, and obtain the distribution of the observed value in the wind cell;

[0022] The scatterometer retrieves the wind field in units of wind units. Taking the spaceborne scatterometer as an example, the wind unit is a series of regular grids divided by the projection of the satellite trajectory as the center. Observations from different azimuths fall into the wind cell during the scatterometer observation process.

[0023] Step 2) For the measured values ​​of backscatter coefficients falling into the wind cell, each group of backscatter coefficients is divided and sorted according to the angle...

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Abstract

The invention discloses a quantitative sea surface wind detecting method. The method comprises the steps that 1) a sector-shaped wave beam rotary scanning scatterometer obtains a measured value of a backward scattering coefficient, and obtains distribution of the observation value in a wind unit; 2) backward scattering coefficient measured values within the wind unit are divided and ordered according to the incidence angle and azimuth to obtain backward scattering coefficient observation vectors respectively; and 3) main component transformation is carried out on the backward scattering coefficient observation vectors within the wind unit to obtain characteristic values corresponding to the vectors, q backward scattering observation vectors with the maximal characteristic values are selected according to the characteristic values, and the wind field is calculated by inversion. According to the method of the invention, information provided by the sector-shaped wave beam rotary scanningscatterometer is used effectively, and high-efficiency rapid inversion of the sea surface wind field is realized.

Description

technical field [0001] The invention relates to the fields of earth science, remote sensing and meteorology, in particular to a method for quantitatively detecting sea surface wind field. Background technique [0002] Accurate quantitative measurement of sea surface wind field has important application value. Efficient and fast wind field estimation, real-time wind field data obtained from observations, which has important application value for navigation, fishery, etc. In addition, accurate sea surface wind field data is also an important key environmental variable, which is of great significance to the study of climate change and short-term and long-term predictions. [0003] Existing sea surface wind acquisition methods mainly include methods using buoys, numerical models, and remote sensing. Buoy data is limited by time and space; numerical models cannot provide real-time measurements. A common method for wind measurement in remote sensing is to use scatterometer obse...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/00G01W1/08
CPCG01W1/00G01W1/08
Inventor 徐星欧董晓龙
Owner NAT SPACE SCI CENT CAS
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