摘要
基于差分GPS水下定位系统的水面浮标长基线网,推导了极坐标系下定位的解析表达式,并根据此解析表达式,推导了水面基线网的网形、基线精度以及水声距离测量精度分别对定位结果影响的表达式。双曲线定位模型解精度的空间分布的分析结果表明:双曲线定位模型存在明显的不稳定区;采用辐射网形基线分布,在基线网的范围内,平面定位精度较均匀;无论采用何种基线分布,深度测量精度明显低于平面精度。
On the basis of buoy long baseline network of differential underwater GPS a resolution formela is developed under polar coordinate system and then a set of analytic equations are deduced which are about the respective effects of the net shape and baseline accuracies, acoustic ranging accuracy on positioning result. The analytic results of the spatial distribution of the accuracy obtained after the hyperbolic positioning model show that there exists distinct area in which the hyperbolic intersection algorithm becomes instability, but if the baseline distribution with radiated net shape is used, thus, in the range of baseline network, the accuracy of plane positioning is even and no matter using any baseline distribution, the depth surveying accuracy will be clearly lower than the plane accuracy.
出处
《大地测量与地球动力学》
CSCD
北大核心
2008年第6期101-106,共6页
Journal of Geodesy and Geodynamics
基金
国家863项目(2005AA613050)"水下GPS立体定位导航系统研制"
关键词
卫星定位系统
水下定位系统
智能浮标
网形分析
解析法
GPS
underwater positioning system
GIB （ GPS Intelligent Buoy）
baseline network analyzing
analytic method
