长河二号系统海上定位精度预测与实验研究  

Precision Prediction and Experimental Study of Positioning Precision of Changhe II System at Sea

作　　者：王程峥[1] 李文魁[1] 高敬东[1] 徐务农[1] 

机构地区：[1]海军工程大学,湖北武汉430033

出　　处：《中国航海》2012年第3期23-26,105,共5页Navigation of China

基　　金：国家自然基金项目(40676055)

摘　　要：现代罗兰C定位体制正从双曲线定位向圆-圆定位,从单台链定位向多台链交叉定位模式发展。为了提高和扩大长河二号系统的定位精度和覆盖范围,通过理论预测和海上实验,研究了不同定位体制和台站组合模式下的罗兰C定位精度预测模型,给出了长河二号系统预测等精度线图。结果表明,在相同测量精度条件下,圆-圆定位具有更大的覆盖范围,多台链交叉定位能明显改善台链结合区域的定位精度,考虑ASF(Additional Second-phase Factor,附加二次相位因子)后,该预测模型可以用于长河二号系统定位精度预测。Modern LorawC is developing from hyperbolic positioning to range range positioning, and its station con figuring modes are developing from single chain to muhi chains. To improve the positioning precision and extend the coverage area of Changhe II system, the prediction model of positioning precision for both positioning mechanisms and both station configuring modes is established on the basis of theoretical deriwttion and sea trial. The predicted positioning precision contour map is given. The study shows that for given measuring precision, range-range positio ning has larger coverage area than hyperbolic positioning, and multi chains positioning significantly improves positio ning precision in the intersection area of chains, compared with the single chain positioning. The prediction model can be used for the positioning precision prediction of Changhc Ⅱ system when the ASF（additional second-phase fac- tor） is taken into account.

关 键 词：船舶、舰船工程 罗兰C 双曲线定位 圆-圆定位 多台链 精度预测 

分 类 号：U675.7[交通运输工程—船舶及航道工程]