罗兰C地波传播的ASF修正研究  

Study on ASF Correction of Loran C Ground Wave Propagation

作　　者：徐务农[1,2] 边少锋[1] 陈永冰[1] 

机构地区：[1]海军工程大学电气与信息学院,武汉430033 [2]海军902厂,上海200083

出　　处：《舰船电子工程》2011年第10期49-51,91,共4页Ship Electronic Engineering

基　　金：国家自然科学基金(编号:40676055)资助

摘　　要：罗兰C信号地波传播ASF(附加二次相位因子)是其定位误差的主要来源,对ASF进行修正可显著提高其定位精度。针对ASF修正进行了理论和实验研究,给出地波在不同传播路径上传播时延的计算方法,并把ASF的理论预测值和实测值进行比对。研究表明,采用理论预测和实测修正相结合的方法,建立罗兰C覆盖区ASF修正数据库是可行的。The ASF（additional secondary factor） of Loran C signal ground wave propagation is the main source of positioning errors,and the positioning accuracy can be significantly improved by mean of ASF correction.The theoretical and experimental researches were conducted in this paper,the theoretical calculation methods of ground wave propagation delay on different propagation paths were given,and the theoretical prediction and measured values were compared.The studies show that it is feasible to establish ASF correction database in Loran C coverage area with combining the theoretical predictions and experimental method.

关 键 词：罗兰C 地波传播 ASF修正 

分 类 号：TN011.5[电子电信—物理电子学]