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A sea surface correlation time acquisition method and system under small radar incident angle

A technology related to time and incident angle, applied in radio wave measurement systems, using re-radiation, radio wave reflection/re-radiation, etc., can solve the problem of excessive deviation of sea surface related time calculation values, and achieve accurate calculation results.

Active Publication Date: 2021-10-08
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a sea surface correlation time acquisition method and system under small radar incidence angles, the purpose of which is to use For related characteristics, the backscatter coefficient of the sea surface is used to describe the correlation time of the sea surface, thereby solving the technical problem of the existing technology that the deviation of the calculation value of the correlation time of the sea surface is too large when the radar incident angle is too small

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  • A sea surface correlation time acquisition method and system under small radar incident angle
  • A sea surface correlation time acquisition method and system under small radar incident angle
  • A sea surface correlation time acquisition method and system under small radar incident angle

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[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0047] like figure 1 Shown is a schematic flow chart of a calculation method based on the correlation time of the sea surface electromagnetic scattering intensity under a small incident angle disclosed in the embodiment of the present invention, which mainly includes the following steps:

[0048] (1) Establish a time-dependent sea surface backscatter coefficient model;

[0049] (11) Assuming t...

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Abstract

The invention discloses a sea surface correlation time acquisition method under a small radar incident angle, and belongs to the technical field of ocean wave microwave remote sensing. The present invention is based on the backscattering coefficient of the electromagnetic scattering model, by calculating the energy density of the electromagnetic scattering of the sea surface, and establishing a time-dependent sea surface backscattering coefficient model; under the condition that the radar incident angle is small, the backscattering coefficient is used to calculate the sea surface The function formula of correlation time introduces the concept of correlation time, and expresses the sea surface correlation time as the formula of the backscatter coefficient changing with time; finally, the sea surface correlation time is calculated according to the formula. The invention also realizes a sea surface correlation time acquisition system under a small radar incidence angle. The invention is applied to the field of ocean remote sensing and solves the existing problem that when the included angle between the flight direction of the aircraft and the observation direction is small, the calculated value of the correlation time of the sea surface deviates greatly from the measured value.

Description

technical field [0001] The invention belongs to the technical field of ocean wave microwave remote sensing, and more particularly relates to a method and system for acquiring sea surface correlation time under a small radar incident angle. Background technique [0002] Oceans are closely related to human life, and 71% of the earth's surface is covered by oceans. With the development of world economy and science and technology, countries pay more and more attention to the development and utilization of oceans. The ocean is rich in resources and plays an irreplaceable role in the development of the entire human society. Sea surface correlation time, as an important parameter of the ocean, plays an irreplaceable role in the cause of ocean remote sensing. It is inseparable from the calculation of sea surface relative time. Through the calculation of the relative time of the sea surface, we can have a deeper understanding of the generation mechanism of some disturbances in the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/88G01S13/95
CPCG01S13/88G01S13/95Y02A90/10
Inventor 陈萍黄煜行徐菲
Owner HUAZHONG UNIV OF SCI & TECH
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