基于Millington方法的ASF数值计算软件设计与实现  

Design and implementation of an ASF numerical calculation software based on Millington method

作　　者：詹金林 黄书科 韩冰 冯卡力 ZHAN Jin-lin;HUANG Shu-ke;HAN Bing;FENG Ka-li(Dept.of Marine,Naval Petty Officer Academy,Bengbu 233012,China)

机构地区：[1]海军士官学校航海系,安徽蚌埠233012

出　　处：《海军工程大学学报》2021年第1期30-33,77,共5页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(40676055)。

摘　　要：为了对罗兰C信号传播过程中的附加二次相位因子(ASF)进行预估,针对ASF的数值计算软件进行了设计与实现。首先,采用米林顿方法为核心算法,建立了罗兰C信号在单传播介质和混合传播介质中的传播模型,并采用C++Builder5进行实现;然后,利用该软件的计算结果,对几种典型路径上的信号传播场强和时延分布规律进行了分析,验证了所设计的计算软件的可靠性;最后,对混合传播介质中的软件计算值和实验值进行对比分析发现,所编制的软件对罗兰C信号场强的预测十分成功,而对ASF的预测精度则与测量点的位置密切相关。In order to forecast the additional secondary factor(ASF)of Loran-C signal when it is propagated,an ASF numerical calculation software was designed and implemented.Millington method was adopted as the core algorithm to build the propagation models of Loran-C signal in the single and mix propagation terrain with the C++Builder5 software.The signal field strength and timing delay in some typical single propagation terrain was analyzed according to the calculation results,and then the reliability of the software was proved.Comparison analysis of calculation and the experiment results in the mix propagation terrain shows that the software is good in the field strength forecasting and its performance in ASF forecasting is highly related to the position of measurement points.

关 键 词：罗兰C 米林顿算法 传播路径 附加二次相位因子 场强 

分 类 号：U662[交通运输工程—船舶及航道工程]