Space-borne gnss-r mirror reflection point ocean tide correction positioning method and system

A specular reflection and positioning method technology, which is applied in the cross field, can solve the problems of not considering the difference between the ellipsoidal surface and the instantaneous sea surface elevation, and the large positioning error of the specular reflection point, so as to reduce the positioning error and improve the positioning accuracy.
CN110376623BActive Publication Date: 2021-09-07CHINA ACADEMY OF SPACE TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA ACADEMY OF SPACE TECHNOLOGY
Publication Date
2021-09-07

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Abstract

The invention discloses a method and a system for correcting and positioning the sea tide of a satellite-borne GNSS-R mirror reflection point. The method includes: acquiring the spatial position information of the navigation satellite and the receiver; according to the acquired spatial position information of the navigation satellite and the receiver, Determine the specular reflection point S on the reference ellipsoid; obtain the static elevation correction amount and the time-varying elevation correction amount; Perform static correction and time-varying correction on S to obtain the specular reflection point S' on the ocean tidal surface; perform normal correction on the specular reflection point S' on the ocean tidal surface to obtain the specular reflection on the ocean tidal surface The position S" of the point S' on the normal vertical plane of the ocean tidal surface. The present invention improves the positioning accuracy of the spaceborne GNSS-R specular reflection point on the sea surface.
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Description

technical field

[0001] The invention belongs to the interdisciplinary technical fields of satellite altimetry, ocean gravity, and ocean tides, and in particular relates to a method and system for correcting and positioning ocean tides of satellite-borne GNSS-R mirror reflection points. Background technique

[0002] Global navigation satellite signal reflection technology (GNSS-R) is a new generation of sea surface altimetry technology. Its principle is to use the distance difference between the GNSS sea surface reflection signal and the direct signal to reach the receiver to achieve altimetry. Compared with traditional satellite altimeters, GNSS-R altimetry has the advantages of rich signal sources, low payload cost, all-weather, all-time, and low power consumption. Based on multi-channel receivers, multiple sea surfaces can be obtained at the same time Reflected signals, combined with a network of multiple GNSS-R satellites, can achieve high spatial resolution global sea su...

Claims

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