Parameter Group Optimization by Combining CUBE with Surface Filtering and Its Application

doi:10.11947/j.JGGS.2020.0209

摘要/Abstract

Abstract:

Shallow water multi-beam echo sounders (MBESs) are characterized by their high resolution and high density, and MBES data processing is a hotspot in modern marine surveying. The Combined Uncertainty and Bathymetry Estimator (CUBE) is the mainstream MBES data processing algorithm, although little is known about its core theories and parameters. In this paper, the basic principle, mathematical model, key parameters, and main processing steps of CUBE are described systematically. A parameter group optimization method that combines CUBE with a surface filter is established. Additionally, an example is given that shows the steps for parameter group optimization, including selection of a typical area, parameter group testing, and comparative analysis, and the method is then applied to shallow water MBES data processing. The results show that the method can improve the accuracy and efficiency of automatic data processing effectively, and it is thus of engineering application value.

Key words: multi-beam echo sounder, CUBE, data processing, parameter optimization, algorithm principle

. [J]. 测绘学报（英文版）, 2020, 3(2): 81-92.

Dineng ZHAO,Ziyin WU,Jieqiong ZHOU,Mingwei WANG,Zhihao LIU,Jiabiao LI. Parameter Group Optimization by Combining CUBE with Surface Filtering and Its Application[J]. Journal of Geodesy and Geoinformation Science, 2020, 3(2): 81-92.

图/表 13

CUBE parameter groups	μ_captdistsca	μ_captdistmin	μ_hes	h_estimoff
CUBE Default	5	0.5	2.95	4
CUBE Deep	20	2	2.95	3
CUBE Shallow	4	0.4	0.5	2
CUBE NOAA	0.5	$G res 2$	1.96	4

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Instrument	Model	Accuracy
Multi-beam Sonar	Reson Seabat 7125	Depth accuracy: 6mm
Positioning	NavCom SF-3050	<0.1m
Heading	—	±0.1° seclat RMS
Heave	IXBlue Octans III	±5cm or 5% RMS
Roll, pitch	—	±0.01° RMS
Tide level	RBRduo T.D\|tide	±0.05% full scale
Surface sound velocity	Reson SVP 70	±0.05m/s
Sound velocity profile	RBR concerto C.T.D	±0.2m/s

No.	CUBE parameter groups	μ_filter	S.A. (%)						G.A./m N.D.
No.	CUBE parameter groups	μ_filter	MACA	MACR	MRCA	MRCR	MACA+ MRCR	MRCA+ MRCR	G.A./m N.D.
1	Default	1.5×Std	94.72	0.831	4.063	0.383	95.10	4.894	0.08
2	Default	2.5×Std	95.37	0.182	4.071	0.375	95.75	4.253	0.06
3	Default	3.5×Std	94.51	0.195	4.915	0.381	94.89	5.110	0.12
4	Deep	2.5×Std	94.93	0.742	3.939	0.385	95.32	4.681	0.09
5	Shallow	2.5×Std	95.85	0.114	3.537	0.502	96.35	3.651	0.03
6	NOAA	2.5×Std	95.98	0.102	3.385	0.532	96.51	3.487	0.03

Parameters	Optimal parameter	Parameter range	Step
μ_captdistsca	0.5	0.1-20	0.25
μ_captdistmin	0.71	0-2	0.1
μ_hes	1.96	0.05-5	0.25
h_estimoff	4	0.1-10	0.5
μ_filter(×Std)	2.5	0.5-5	0.5