Determination of precise instantaneous height at multibeam transducer
Tóm tắt
To overcome the shortcomings of the traditional multibeam survey and data processing, a new method is presented for the precise determination of the instantaneous height at the multibeam transducer by the blend of GPS height and heave signals. Before signal blend, GPS height and heave signals need to be corrected first to the transducer center by attitude correction. Second, the GPS height needs to be checked and modified by heave check and modification itself. Butterworth and FFT (fast Fourier transformation) were used in the signal blend. Finally, FFT is thought to be appropriate in signal processing. The new method efficiently overcomes the shortcomings of the traditional method, and this is proven well by the MBS (multibeam bathymetric system) experiment.
Tài liệu tham khảo
Mallace D (2003) A comparison of shallow water multibeam systems from a commercial viewpoint[C]. 2003 Shallow Survey Conference, Sydney
Hughes Clarke J E (1996) Vertical position requirements and method [R]. Coastal Multibeam Training Course, ST Andrews, New Brunswick
Zhao Jianhu, Zhou Fengnian, Zhang Hongmei (2001) Study on GPS tidal level measurement [J]. Bulletin of Surveying and Mapping, (8): 1–3 (in Chinese)
Opshinski T (2004) Bathy 1500 heave compensation data from Castle Hill Area [OL]. http://www.oceandata.com/support/b15/app-notes/b15heave2.htm
Zhao Jianhu(2002) Study on method of sounding data and image data[D]. Wuhan: Wuhan University (in Chinese)
Song Wenyao, Zhang Yang (1991) Kalman filter [M]. Beijing: Science Press (in Chinese)
Proakis J G, Manolakis D G (2004) Theory, method and applications of digital signal processing [M]. Beijing: China Electric Power Press (in Chinese)