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Abstract
The traditional method for processing multi-beam real-time attitude compensation data did not consider the influence of attitude compensation error, which left attitude residual in data. So a new method for processing multi-beam data of real-time attitude compensation was proposed. By studying the nature of attitude compensation error, the calculation method of systematic attitude compensation error was put forward. The concept of correction threshold was introduced and the specific determination method was given. Finally, combining with the principle of real-time attitude compensation, a systematic attitude compensation error correction method, which makes use of a tracking algorithm considering attitude to make secondary attitude correction, was proposed, and the specific processing flow was given. By comparing the data processing accuracy of the tradition method and the new method, the results showed that the new method can effectively reduce the influence of systematic attitude compensation error, and significantly improve the data processing accuracy.
Highlights
Attitude correction is one of the most important links in multi-beam data processing
In order to improve the accuracy of data processing while ensuring processing efficiency, the correction threshold is introduced as the basis for judging whether to make secondary corrections, that is, only secondary attitude correction is performed on data whose systematic attitude compensation error exceeds the threshold
Based on the same idea, the second attitude correction directly affects the attitude on the beam incidence angle, that is, the accurate sound tracking algorithm that takes into account attitude is used for correction
Summary
Attitude correction is one of the most important links in multi-beam data processing. Post-measure attitude processing can no longer be performed in real-time attitude compensation mode, for data that may have compensation errors, reasonable secondary attitude correction is a way to improve the accuracy of the measured data. It is necessary to research on the multi-beam real-time attitude compensation data processing method based on the traditional real-time attitude compensation operation mode. Real-time attitude compensation can well eliminate the phenomenon of band bending and uneven distribution of measurement points caused by bad sea conditions It is mainly based on attitude measurement values to estimate the attitude of the future moment through a specific algorithm. Due to the real-time nature of the multi-beam measurement, it cannot repeat redundant observations of the attitude, and cannot eliminate the accidental error in the attitude data by the adjustment method. The following will mainly study how to use data processing to weaken the impact of the systematic part of the attitude compensation error on the data quality
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