基于圆形地质模型的洛兰-C伪色定位方法的研究及其在内陆地区的应用
1School of Electrical Engineering, Naval University of Engingeering, Wuhan 430000, China.
Sensors (Basel, Switzerland)
|August 28, 2025
概括
新的圆形模拟距离定位 (EPP) 方法通过减少定位错误和提高准确性,改善了洛兰-C在内陆地区的导航. 这种方法为Loran-C应用提供了更好的覆盖和可靠性.
科学领域:
- 地理工程
- 导航系统
- 地质学
背景情况:
- 洛兰-C系统传统上使用球形超波拉定位 (SHP),由于地球的圆形状,在内陆地区引入错误.
- SHP存在高精度几何稀释 (GDOP) 和难以在复杂环境中接收多个站的信号.
- 这些限制限制了Loran-C在内陆地区的应用和开发.
研究的目的:
- 解决内陆Loran-C应用中的SHP算法的局限性.
- 引入和评估圆形伪色域定位 (EPP) 方法.
- 在复杂的内陆地形上提高Loran-C的定位精度,覆盖范围和可靠性.
主要方法:
- 开发了圆形伪色定位 (EPP) 算法,它解释了地球的圆形状.
- 减少对单一洛兰-C链的信号的依赖, 只用三个站实现定位.
- 在中国,包括内陆山区,使用Loran-C链进行模拟分析和实地测试.
主要成果:
- 与模拟中的SHP相比,EPP算法将定位覆盖面积提高了129.1%至284.6%.
- 实地测试显示,根平均平方误差 (RMSE) 从417.2米 (SHP) 降至43.1米 (EPP),改善了89.7%.
- 在复杂的内陆地形上,EPP有效地降低了GDOP,提高了定位精度和可用面积.
结论:
- 该方法克服了SHP固有的地球圆模型错误.
- EPP显著降低了GDOP,从而大大提高了定位准确性和覆盖范围.
- 该方法为Loran-C内陆导航,计时和备份应用提供了可靠的技术支持.
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