Antenna range direction weighting specific value height measurement method and device

Abstract

The invention discloses an antenna range direction weighting specific value height measurement method. The method includes the steps of acquiring two images in the same scene in a time-sharing mode by using a phased array single antenna, determining the pixel ratio of the two images as the ratio of range direction weighting functions of time-sharing antennae, determining a target viewing angle according to the ratio of the range direction weighting functions, and determining a target height according to the target viewing angle. The invention further discloses an antenna range direction weighting specific value height measurement device. With the antenna range direction weighting specific value height measurement method and device, the height of a target object can be measured with small calculated amount, height measurement accuracy is guaranteed, and conflict between height measurement accuracy and registration accuracy and conflict between phase ambiguity and height measurement accuracy are avoided.

Description

technical field [0001] The invention relates to a Synthetic Aperture Radar (SAR, Synthetic Aperture Radar) altimetry technology, in particular to a method and a device for measuring an antenna distance weighted ratio. Background technique [0002] Currently commonly used altimetry techniques include single-track interferometric synthetic aperture radar technology and double-track interferometric synthetic aperture radar technology. Among them, when using single-track interferometric synthetic aperture radar technology to measure altimetry, the impact of time decorrelation is small and the measurement accuracy is high, but the cost of the SAR system is expensive; big influence. In addition, these two traditional interferometric synthetic aperture radar technologies have common shortcomings: first, the altimetry algorithm has many steps and is complex; Registration accuracy, phase ambiguity and measurement accuracy are two pairs of contradictions that cannot be overcome. ...

AI Technical Summary

Problems solved by technology

Among them, when using single-track interferometric synthetic aperture radar technology to measure altimetry, the impact of time decorrelation is small and the measurement accuracy is high, but the cost of the SAR system is expensive; Great impact

In addition, these two traditional interferometric synthetic aperture radar technologies have common shortcomings: first, the altimetry algorithm has many steps and is complex; Registration accuracy, phase ambiguity and measurement accuracy are two pairs of contradictions that cannot be overcome

[0003] However, the above two pairs of contradictions will be intensified with the improvement of SAR resolution and elevation measurement requirements, and the existence of the registration accuracy problem is caused by the non-coincidence of the antenna tracks of the two interfering parties, and the non-coincidence of the antenna tracks of the interfering parties is the Traditional interferometry inherently required; phase ambiguity is a problem common to correlation parameter inversion using phase

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