A method and system for on-orbit calibration of installation parameters of a high-frequency angular displacement sensor

A technology of installation parameters and calibration methods, which is applied in the field of remote sensing satellite ground data processing, can solve problems such as gross errors, calibration, measurement noise installation parameters, etc., and achieve the effect of ensuring data quality and reliability

Active Publication Date: 2022-07-19
WUHAN UNIV
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Problems solved by technology

[0003] Aiming at the problems of gross error, measurement noise and installation parameter calibration in the original observation data of high-frequency angular displacement, the present invention provides an on-orbit calibration method for installation parameters of high-frequency angular displacement sensor

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  • A method and system for on-orbit calibration of installation parameters of a high-frequency angular displacement sensor
  • A method and system for on-orbit calibration of installation parameters of a high-frequency angular displacement sensor
  • A method and system for on-orbit calibration of installation parameters of a high-frequency angular displacement sensor

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[0026] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0027] The invention utilizes FIR filtering and subsection FFT transformation to realize the preprocessing of high-frequency angular displacement data, improve the quality and continuity of the original observation value, and calibrate the model on-orbit based on the angular displacement installation parameters to calibrate the measurement coordinate system of the angular displacement component and the star sensor. The relative installation parameters between the reference coordinate systems, and the unified reference of the optical remote sensing satellite attitude measurement system.

[0028] see figure 1 , a high-frequency angular displacement sensor installation parameter on-track calibration process provided by the embodiment of the present invention includes the following steps:

[0029] In step 1, a finite-length unit ...

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Abstract

The invention provides an on-orbit calibration method and system for installation parameters of a high-frequency angular displacement sensor, including using FIR to perform noise reduction processing on original observed high-frequency angular displacement data; , and perform threshold processing on the data amplitude information to achieve high-frequency angular displacement data recovery and quality improvement; solve the satellite body attitude quaternion time series to obtain the satellite body angle increment reference value time series; The obtained body angle increment observations are time-accumulated to obtain a time series of body angle increment measurement values ​​that is unified with the time series time base of the satellite body angle increment reference value; a high-frequency angular displacement on-orbit installation parameter calibration model is established, The least squares optimal estimation method is used to solve the error value of the installation parameters; the calculation is iterative until the correction value of the installation error of the high frequency angular displacement is less than the set threshold, and the on-orbit calibration result of the installation parameters of the high frequency angular displacement is obtained.

Description

technical field [0001] The invention belongs to the field of remote sensing satellite ground data processing, and relates to an on-orbit calibration method and system for installation parameters of a high-frequency angular displacement sensor. Background technique [0002] The high-frequency angular displacement sensor can output angular increment data of tens of thousands of hertz, and the frequency range of the platform attitude that can be sensed can reach 0.2 to 1000 Hz, and it can maintain high measurement accuracy when the satellite moves at high speed, which is a high-resolution optical remote sensing. Satellite high-frequency high-precision attitude data processing provides a new idea and method. However, due to the high sampling frequency of angular displacement data, the quantization noise in the observation data is significant, and the real angular increment information of the satellite platform is masked; and there are various systematic and accidental errors in ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 朱映王艳丽王密
Owner WUHAN UNIV
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