基于北斗的罗兰CASF数据采集器设计与实现

The Design and Implementation of Loran C ASF Data Recorder based on Bei Dou Module

地波传播延迟ASF随时空、天气变化而不同,是影响罗兰C PNT的准确性、可靠性、连续性的主要误差来源。本文给出了一款基于北斗的ASF修正数据采集器设计方案,进行ASF修正研究和建库,并对两种定位系统实测值进行比对。测试表明,采用实测ASF建库修正方法,可显著提高其定位精度,建立罗兰C覆盖区ASF修正数据库是可行的、可信的。

ASF ground wave propagation delay changes due to different time, space, weather, it is the main error source of Loran C PNT that affect the accuracy, reliability, continuity. This paper gives the ASF correction data acquisition based on a design of Bei Dou module, research and build database of ASF correction, and compared the two positioning systems using measured values. Testing showed that the measured ASF database can significantly improve positioning accuracy, the establishment of Loran C coverage ASF correction database is feasible and credible.