High-precision regional troposphere refractive index three-dimensional inversion method

Abstract

The invention provides a high-precision regional troposphere refractive index three-dimensional inversion method. On the basis of sounding meteorological data accumulated by the national meteorological bureau for a long time, a troposphere refractive index profile model adapting to a test task area in China is established, so that the three-dimensional inversion precision of the troposphere refractive index is improved, and the method comprises the following steps: calculating the troposphere refractive index profile on the basis of the sounding meteorological data; through statistical analysis, establishing a statistical relational expression between each height refractive index of the troposphere of each sounding site and the ground parameters; establishing an inversion model of different height refractive indexes of the troposphere of the sounding site; establishing a high-precision refractive index inversion model by utilizing geographical location information, time information anda ground meteorological information driving model of a target site and adopting a double-harmonic spline interpolation method. Therefore, the inversion precision can be further improved, the inversion effect on any point in the area is better, the number of driving elements is small, and the method has higher generalization performance.

Description

technical field [0001] The invention belongs to the technical field of aerospace test measurement and control, and relates to a three-dimensional inversion method of the tropospheric refractivity in a high-precision region. Based on the air sounding meteorological data accumulated by the National Meteorological Administration for a long time, a tropospheric refractivity profile model suitable for the test task area of ​​our country is established. So as to improve the accuracy of three-dimensional inversion of tropospheric refractivity. Background technique [0002] It should be understood that the finalization of the missile must be verified by the actual measurement data of the missile flight test. In the missile flight test, the measurement and control system completes the tracking of the missile, records the live flight of the missile, and obtains flight test data such as the missile’s outer ballistic parameters, telemetry parameters and target characteristic parameters ...

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Problems solved by technology

[0010] However, the tropospheric refractivity retrieval method based on airsounding meteorological data has the following disadvantages: test missions usually need to release the sounding balloon in advance to obtain the airsounding meteorological data, the cost is high, and only the tropospheric refractivity profile over a single station can be obtained. It is unable to cover the whole period of the test in time, and the task area of ​​the test cannot be covered in space, and there is a certain deviation from the task requirements

[0019] However, the retrieval of tropospheric refractivity based on the Hopfield model has the following disadvantages: the Hopfield model is an empirical formula based on the statistics of global air sounding meteorological data, and the retrieved tropospheric refractive index profile is closer to the actual tropospheric refractive index distribution. In contrast, the inversion deviation in China is relatively large

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