Design of Optimum Filter for Blend of GPS Height and Heave
Precise determination of transducer instantaneous height of multibeam bathymetric system (MBS) is a very important work in fulfilling the transformation from the MBS sounding data to the underwater topographic height. The blend of GPS height and heave can get accurately the solution. But it is a key to design an optimum filter for implementing the blend. In this paper, we study in detail the method of designing optimum filter for the blend. Firstly, we analyze the frequency-spectrum characters of GPS height signal, heave signal and tidal level. secondly, we choose Fast Fourier Transform (FFT) as an optimization filter design method for the extraction and blend of the valid signals. Thirdly, by analyzing the frequency-band distributions of GPS height signal and heave signal, we give out the appropriate cut-off frequency as 1/10 Hz in the signal blend. Based on above research, we blend the low-frequency signal from GPS height and the highfrequency signal from heave. Finally, the research was tested and proved by an actual project. An underwater topographic accuracy better than 10 centimeters was achieved by the research with MBS.
design of optimum filter cut-off frequency GPS height signal heave blend of GPS height and heave
Hongmei Zhang Jianhu Zhao Xueling Bai
School of power and mechanical engineering,Wuhan University,Wuhan,Hubei,430072 School of geodesy and Geomatics,Wuhan University,Luoyu Road 129,Wuhan,Hubei,430079
国际会议
2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)
北京
英文
2346-2350
2009-08-16（万方平台首次上网日期，不代表论文的发表时间）