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A dual-frequency radar scatterometer and a method for simultaneously measuring sea surface wind field and current field

A sea surface wind field and radar scattering technology, applied in the field of remote sensing, to achieve the effect of fast global coverage and fast global measurement

Active Publication Date: 2021-06-08
NAT SPACE SCI CENT CAS
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the existing observation means cannot quickly realize the simultaneous measurement of the global sea surface wind field and flow field, and provide a dual-frequency radar scatterometer and a method for simultaneously measuring the sea surface wind field and flow field

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  • A dual-frequency radar scatterometer and a method for simultaneously measuring sea surface wind field and current field
  • A dual-frequency radar scatterometer and a method for simultaneously measuring sea surface wind field and current field
  • A dual-frequency radar scatterometer and a method for simultaneously measuring sea surface wind field and current field

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] Compared with synthetic aperture radar, real aperture radar system is simpler, but its resolution is coarser. However, for open sea observations, the spatial resolution of real aperture radar can meet its application requirements. The observation swath of real aperture radar is wider, and the power requirement of real aperture radar is smaller or the signal-to-noise ratio is higher under the same transmission power, and the amount of data is smaller. It can work continuously all day long, and it is convenient to achieve fast global coverage.

[0033] For the above considerations, the dual-frequency radar scatterometer in the present invention is a real aperture radar, and the dual-frequency radar scatterometer system includes an antenna unit, a transmitter unit and a receiver unit; wherein, the antenna unit a...

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Abstract

The invention discloses a dual-frequency radar scatterometer and a method for simultaneously measuring sea surface wind field and flow field. The dual-frequency radar scatterometer includes an antenna unit, a transmitter unit and a receiver unit; wherein, the antenna unit adopts a narrow The beam conical scanning system is used to realize the rotating pencil beam scanning; the transmitter unit and the receiver unit are respectively connected to the antenna; the transmitter unit is used to generate the transmission signal and transmit the transmission signal through the antenna unit; the signal arrives After the detection target returns, the antenna unit receives the return signal, and then transmits it to the receiver unit, and the receiver unit receives echo power signals and Doppler information from different observation azimuths. The method can realize the simultaneous measurement of sea surface wind field and current field through the dual-frequency radar scatterometer. The method of the invention can simultaneously acquire high-precision, wide-swath coverage global sea surface wind field and flow field information.

Description

technical field [0001] The invention relates to the technical field of remote sensing, in particular to a dual-frequency radar scatterometer and a method for simultaneously measuring sea surface wind field and flow field. Background technique [0002] The sea surface wind field is the main source of power for the movement of the upper ocean, which is directly related to almost all seawater movements in the ocean, and is one of the important physical parameters of oceanography. In the process of ocean dynamics, the sea surface wind field is not only the direct driving force for the formation of sea surface waves, but also the driving force for regional and global ocean circulation. The wind field itself is a crucial factor in the ocean-atmosphere dynamical system. In numerical models such as ocean waves, currents, and storm surges, the wind field usually needs to be determined first as an input factor. Therefore, the measurement and analysis of the sea surface wind field is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/95
CPCG01S13/95Y02A90/10
Inventor 董晓龙苗媛静朱迪
Owner NAT SPACE SCI CENT CAS
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