Method for on-line correcting low-angle radar electric wave refraction error

Abstract

The invention discloses a method for on-line correcting low-angle radar electric wave refraction error. When a radar measures a target, radar measured parameter distance and angle are used to obtain radar positioning parameters with atmosphere refraction errors eliminated through a device formed by a GPS receiver, a ground atmospheric refractivity measuring instrument, an atmosphere profile database, a control and data processor and related interface circuits. The parameters are used for positioning a target, and the radar positioning precision is improved. The refraction error correction method is simple, and low in computation burden, short in time, high in precision, high in automation level and easy for realization. The method realizes on-line correcting radar electric wave refraction error in a high-precision way.

Description

technical field [0001] The invention belongs to the technical field of radar measurement error correction methods, and in particular relates to an online correction method for low-angle radar electric wave refraction errors. Background technique [0002] Improving the measurement and positioning accuracy of radar is a necessary condition for applications such as navigation, satellite and measurement and control. With the improvement of the accuracy of the electronic components that make up the radar system and the optimization of related data processing methods, the refraction error of radio waves caused by the atmospheric environment has become the main factor that limits the further improvement of radar measurement accuracy. [0003] When radar detects air targets, radio waves must pass through the atmosphere (including the troposphere and ionosphere) environment. The inhomogeneity of the atmospheric environment causes refraction effects when radio waves propagate in the ...

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Problems solved by technology

However, this method can only correct the distance refraction error, not the angle refraction error, and the correction parameters are incomplete; second, the refraction error obtained by it is only the error amount from the radar to infinity, not the distance from the radar to the target. The error amount between, the correction range is larger than the actual radio wave passing interval, which expands the error amount

The other is a simplified correction method for idealized approximation of some parameters. It not only requires a lot of preliminary data statistics work, but also has low correction accuracy and can only be applied to radar systems in typical areas participating in the statistics.

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