GNSS-R shore-based platform sea surface oil spill area detection method

A technology of sea surface oil spill and detection method, applied in the field of sea surface oil spill area detection of GNSS-R shore-based platform, can solve the problems of poor mobility, only monitoring specific sea areas, and limited application popularization, and achieves flexible simulation. Effect

Inactive Publication Date: 2019-11-12
金华航大北斗应用技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems in the existing methods that need to be improved. For example, the limitation of the detection range of the equipment makes it only able to monitor small areas of oil spill pollution, and its popularization is also limited by the high cost of equipment.
[0005] Patent No.: CN105137427A discloses a rapid monitoring method for oil spills on the sea surface, which can accurately monitor oil spills in real time, but its network chart radar antenna and hydrometeorological sensors are installed on shore monitoring platforms or gathering platforms, which can only In a specific sea area, there is nothing to do with oil spills in other sea areas, poor maneuverability, and it is impossible to measure the oil spill area

Method used

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  • GNSS-R shore-based platform sea surface oil spill area detection method
  • GNSS-R shore-based platform sea surface oil spill area detection method
  • GNSS-R shore-based platform sea surface oil spill area detection method

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Experimental program
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Effect test

Embodiment 1

[0027] like Figure 1 to Figure 5 As shown, a GNSS-R shore-based platform sea surface oil spill area detection method includes the following steps:

[0028] (1) Through the detection equipment, calculate the area of ​​the effective coverage area, and obtain the platform position and the assumed height data of the antenna, and calculate the coverage area of ​​the transmitted signal received by the antenna at different times, as the flashing area;

[0029] (2) According to the blazed area calculated in step (1), the dielectric constant is inverted for the emission signal in the blazed area;

[0030] Calculation of signal reflectivity polarization ratio: for received direct and reflected signals, use the calculation method of signal correlation value and reflectivity, the relationship between reflectivity and related power is as follows, where Γ represents reflectivity, Indicates the relative power:

[0031]

[0032] According to the above formula, the left-handed reflectiv...

Embodiment 2

[0040] A GNSS-R shore-based platform sea surface oil spill area detection method, comprising the following steps:

[0041] (1) Through the detection equipment, calculate the area of ​​the effective coverage area, and obtain the platform position and the hypothetical height data of the antenna, calculate the coverage area of ​​the transmitted signal received by the antenna at different times, and use it as the flashing area; image 3 and Figure 4 As shown, point O is the origin of the coordinates, indicating the projection point of the receiving antenna on the sea surface, the X-axis points to the south, the Y-axis points to the east, the Z-axis passes through point O and is perpendicular to the XOY plane; SP is the mirror reflection point; θ is the satellite altitude angle; is the azimuth angle of the satellite, and the RHCP antenna is a right-handed circularly polarized antenna for receiving satellite direct signals; the LHCP antenna is a left-handed circularly polarized a...

Embodiment 3

[0054] The applicable scattering model of GNSS-R used in this embodiment is based on the geometrical optics model of Kirchhoff approximation. Under ideal conditions, when the reflective surface is smooth, the specular reflection strictly satisfies the law of Fresnel reflection, so only when the reflection vector direction to receive the signal. Under the actual sea surface conditions, considering the influence of roughness, the direction of some small facets on the reflective surface changes, so that the mirror reflection direction of the facet changes accordingly. , can also receive specular reflection signals, the greater the roughness of the reflecting surface, the greater the number of specular reflection signals acceptable to the receiving antenna, and the larger the range of bin distribution. This area with obvious microwave reflection is called the blaze area, such as Figure 5 Shown:

[0055] Point O in the figure represents the specular reflection point, point S rep...

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Abstract

The invention relates to the technical field of sea surface oil spill area detection, and discloses a GNSS-R shore-based platform sea surface oil spill area detection method. The method comprises thefollowing steps of 1, computing the area of an effective coverage area via detection equipment, and acquiring platform position and antenna erection height data, and computing coverage ranges of transmission signals received by an antenna at different moments to serve as shining areas; 2, inverting dielectric constants of the transmission signals within the shining areas according to the shining areas computed in the step 1; and 3, judging a sea surface oil spill condition. According to the method, the range of the effective coverage area of a navigation satellite needs to be computed at first, the effective coverage ranges (shining areas) of reflected signals can be received by the antenna at different moments are computed according to the acquired navigation satellite orbit parameters, platform position and antenna height data, compute simulation is performed on the shining areas within a period of time, and flexible simulation can be performed on the coverage condition of the shining areas of the satellite at different time.

Description

technical field [0001] The invention relates to the technical field of sea surface oil spill area detection, in particular to a GNSS-R shore-based platform sea surface oil spill area detection method. Background technique [0002] Marine oil spill is one of the main factors that cause marine environmental pollution damage. Among various marine pollution, oil pollution ranks first in terms of frequency of occurrence, distribution breadth, and degree of harm. Marine oil spills are caused by accidents. , Such as ship collision, ship capsizing, rupture of offshore oil wells and oil pipelines, leakage of subsea oilfields, etc. With the development of the world's marine transportation industry and the continuous production of offshore oil fields, oil spill accidents continue to increase, often causing oil pollution on a large area of ​​the sea, not only damaging the ocean, the natural environment of the atmosphere, and ecological resources, but also causing a large number of death...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/32G01S19/42G01S19/13
CPCG01B7/32G01S19/13G01S19/42
Inventor 不公告发明人
Owner 金华航大北斗应用技术有限公司
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