论文标题
天空对MF DGNSS R模式信号的初步分析在白天和夜间
Preliminary Analysis of Skywave Effects on MF DGNSS R-Mode Signals During Daytime and Nighttime
论文作者
论文摘要
准确的定位，导航和计时（PNT）性能是当今几种技术的先决条件。在海洋环境中，很难在视觉上准确地识别自己的位置，从而导致安全问题。当前，PNT信息主要来自全球导航卫星系统（GNSS）；但是，它容易受到射频干扰，欺骗和电离层异常的影响。因此，需要对备份系统的研究。范围模式（R-Mode）是一种陆地集成导航系统，正在研究用于海洋环境中。 R模式是一种定位技术，它集成了机会的陆地信号，例如中频（MF）差异GNSS（DGNSS），非常高的频率（VHF）自动识别系统（AIS）和增强的远程导航（Eloran）信号。欧洲先前的研究表明，MF频段中的信号在白天和夜间之间的准确性方面有很大差异。这种差异主要是由Skywave引起的。在这项研究中，从韩国的大山和韩国大达（Daesan）收到了从韩国Chungju传播的MF DGNSS R模式信号。比较和调查了白天和夜间的Skywave效果。另外，在夜间增加了R模式信号的连续波强度，以比较其对测量精度的影响。
Accurate positioning, navigation, and timing (PNT) performance are prerequisites for several technologies today. In a marine environment, it is difficult to visually identify one's position accurately, leading to safety concerns. Currently, PNT information is provided mainly from Global Navigation Satellite Systems (GNSS); however, it is vulnerable to radio frequency interference, spoofing, and ionospheric anomaly. Therefore, research on a backup system is needed. Ranging Mode (R-Mode), a terrestrial integrated navigation system, is being investigated for use in a marine environment. R-Mode is a positioning technology that integrates terrestrial signals of opportunity such as medium frequency (MF) differential GNSS (DGNSS), very high frequency (VHF) automatic identification system (AIS), and enhanced long-range navigation (eLoran) signals. Previous studies in Europe show that signals in the MF band differ greatly in accuracy between daytime and nighttime. This difference is primarily caused by skywave. In this study, the MF DGNSS R-Mode signal transmitted from Chungju, Korea was received in Daesan and Daejeon, Korea. The skywave effect during daytime and nighttime was compared and investigated. In addition, the continuous wave intensity of the R-Mode signal was increased during the nighttime to compare its effect on the measurement accuracy.
