舰船电子工程
艦船電子工程
함선전자공정
SHIP ELECTRONIC ENGINEERING
2011年
10期
49-51,91
,共4页
罗兰C%地波传播%ASF修正
囉蘭C%地波傳播%ASF脩正
라란C%지파전파%ASF수정
Loran C%ground wave propagation%ASF correction
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。
囉蘭C信號地波傳播ASF(附加二次相位因子)是其定位誤差的主要來源,對ASF進行脩正可顯著提高其定位精度。針對ASF脩正進行瞭理論和實驗研究,給齣地波在不同傳播路徑上傳播時延的計算方法,併把ASF的理論預測值和實測值進行比對。研究錶明,採用理論預測和實測脩正相結閤的方法,建立囉蘭C覆蓋區ASF脩正數據庫是可行的。
라란C신호지파전파ASF(부가이차상위인자)시기정위오차적주요래원,대ASF진행수정가현저제고기정위정도。침대ASF수정진행료이론화실험연구,급출지파재불동전파로경상전파시연적계산방법,병파ASF적이론예측치화실측치진행비대。연구표명,채용이론예측화실측수정상결합적방법,건립라란C복개구ASF수정수거고시가행적。
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.