罗兰C系统试飞中的ASF修正方法分析  

Analysis of ASF revision method in Loran C system test flight

作　　者：袁大天[1] 陈亮[1] 李太平[1] 

机构地区：[1]中国飞行试验研究院,陕西西安710089

出　　处：《现代电子技术》2015年第13期160-162,共3页Modern Electronics Technique

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修正进行了数学模型和直接测量研究,并把数学模型修正ASF后的罗兰C定位误差和直接测量修正ASF后的罗兰C定位误差进行比对。研究表明,采用数学模型修正和直接测量修正相结合的方法,能够更好地提高罗兰C系统的定位精度,提高试飞效率。The additional secondary factor （ASF） transmitted by [.（）ran C signal ground wave is the main sour（.e of its posi- tioning errors. ASF revised can improve the positioning accuracy significantly. The mathematical model and the direct measure- ment are studied based on ASF revision, then Loran C positioning errors after mathematical model ASF revised and direct mea- surement ASF revised are compared. The study results show that the method in combination with mathematical model revision and direct measurement revision can better improve the positioning accuracy of Loran C system and test flight efficiency.

关 键 词：罗兰C ASF修正 飞行试验 定位误差 

分 类 号：TN967.6[电子电信—信号与信息处理]