A satellite attitude model construction method based on frequency domain analysis

Abstract

The present invention discloses a satellite attitude model construction method taking satellite attitude change regularity and periodicity into account, and according to the method, a satellite attitude model is reasonably constructed in the manner of taking full account of the satellite inherent attitude vibrational frequency, the constructed attitude model comprises two parts of a general polynomial part and a trigonometric polynomial part, the general polynomial part covers a satellite attitude signal smoothing section, the trigonometric polynomial part contains satellite attitude signal regularity and periodicity sections, and the construction of an optimized satellite attitude model can be achieved by independent fitting and joint construction of the two parts of the general polynomial part and the trigonometric polynomial part. Under the premise of taking full account of the satellite own specific rules, the method has high precision attitude fitting characteristic, can use the model for satellite attitude interpolation, can effectively suppress attitude data abnormal values, and can effectively suppress white noise mixed in the attitude.

Description

technical field [0001] The invention relates to the technical field of satellite attitude post-processing, in particular to a method for constructing a satellite attitude model based on frequency domain analysis, which is applied to ground positioning of satellite photogrammetry. Background technique [0002] At present, with the continuous improvement of the ground resolution of high-resolution remote sensing satellites, the accuracy of satellite attitude has become one of the main bottlenecks restricting the development of satellite surveying and mapping in the direction of large-scale mapping. Due to the energy distribution of the satellite load, the limitation of the hardware equipment of the attitude measurement system, the bandwidth of the data download channel and the capacity limitation of the ground storage device, etc., it is impossible to measure and record the attitude data according to the image line by line, but Attitude data is obtained by sampling at a fixed ...

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Problems solved by technology

[0007] Aiming at the characteristics of the traditional attitude interpolation method, the present invention provides a new attitude acquisition method, which overcomes the shortcomings of poor stability of Lagrange interpolation method, low precision of general polynomial and poor adaptability of mathematical method interpolation, and fully takes into account the characteristics of the satellite platform itself , to build a functional model of the satellite attitude

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