High accuracy testing method for angular velocity fluctuation of fully polarized microwave radiometer

A technology of microwave radiometer and testing method, which is applied in the field of testing, can solve problems such as aliasing, signal distortion, and false components in time-domain waveforms, and achieve the effects of accurate angular velocity, small data interference, and avoiding test data errors

Active Publication Date: 2017-05-24
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

[0004] (1) Limited by the test conditions, the sampling rate of the fully polarized microwave radiometer test system is 1 Hz, and the analysis bandwidth is 0-0.5 Hz; if the sampling rate is too low, frequency components higher than 0.5 Hz will be mixed in, resulting in The signal is distorted so that its time domain waveform contains spurious components

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  • High accuracy testing method for angular velocity fluctuation of fully polarized microwave radiometer

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Embodiment Construction

[0024] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0025] Such as figure 1 Shown, the present invention comprises the following steps:

[0026] Step 1, configure a suitable inertia disk for the fully polarized microwave radiometer, and obtain the moment of inertia I of the fully polarized microwave radiometer through theoretical calculation or moment of inertia test;

[0027] Step 2: Choose a three-way micro-interference force sensor S that meets the four indicators of bearing capacity, resolution, range, and bandwidth 1 , S 2 , S 3 ;

[0028] Step 3, select a rigidly supported rectangular platform;

[0029] Step 4, connect the three-way micro-interference force sensor S 1 , S 2 , S 3 Fixed on a rectangular platform, the line connecting the centroids of the three sensors is rectangular;

[0030] Step five, for the three-way micr...

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Abstract

The invention discloses a high accuracy testing method for angular velocity fluctuation of a fully polarized microwave radiometer. The method comprises: step one, an appropriate inertia disk is arranged for a fully polarized microwave radiometer and rotation inertia of the fully polarized microwave radiometer is obtained by theoretical calculation or rotation inertia testing; step two, three-way micro-disturbance force sensors meeting four indexes: bearing capacity, resolution, range and bandwidth are selected; step three, a rectangular platform with rigid support is selected; step four, the three-way micro-disturbance force sensors are fixed at the rectangular platform; step five, the length and width of the rectangle formed by connecting lines of the mass centers of the three-way micro-disturbance force sensors are calibrated by using professional calibration equipment; and step six, a connection tool plate between the fully polarized microwave radiometer and a micro-disturbance test platform are designed. The measured angular velocity is accurate; and a testing data error caused by signal distortion of the fully polarized microwave radiometer can be eliminated.

Description

technical field [0001] The invention relates to a test method, in particular to a high-precision test method for angular velocity fluctuations of a fully polarized microwave radiometer. Background technique [0002] The full-polarization microwave radiometer is an important microwave remote sensing instrument for spaceborne remote sensing of sea surface wind field in the future, which can provide important and valuable information for short-term weather forecast, climatology and oceanographic research. The angle fluctuation produced by the fully polarized microwave radiometer during its working process will affect the test accuracy of the fully polarized microwave radiometer and the stability of the satellite platform, which in turn may affect the effective work of other high-precision payloads on the satellite. Therefore, it is necessary to accurately measure its angular fluctuation, and it also has guiding significance for the corresponding research on frequency optimizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/00
Inventor 周宇赵发刚冯彦军
Owner SHANGHAI SATELLITE ENG INST
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