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第三届中国卫星导航学术年会

作者： Jian Dai1, Taosheng Wang2, Xiao Li1 , Zhao Yang3 1. China Astronautics Standards Institute, Beijing, China, 10007, 2. Beijing Institute of Tracking and Telecommunication Technology, Beijing, China, 100094 3. Beihang University, Beijing, China, 100191

satellite navigation has become the important means of navigation nowadays. However we can’t receive the navigation signal in the building well because of extremely weak navigation signal near the earth surface, wall block of building, indoor multi-path effect and reflection of navigation signal. So the indoor navigation technique has become research focus in recent years. In this paper, we first presented a new method to analysis indoor propagation characteristics of satellite navigation signal based on parallel finite-difference time-domain （FDTD）, and a novel time-domain excitation source of navigation signal was provided to simulate incidence wave under different elevation angle and position of navigation satellite. This method can present the indoor electromagnetic field value and distribution of navigation signal at anywhere and any time, and showed the real physical fields of wave propagation and eclipse clearly, instead of measurement which cost too much. The simulation results showed the validity of the presented method in this paper.

关键词： satellite navigation signal parallel FDTD field distribution eclipse indoor seamless connection

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Empirical model of correction for zenith tropospheric delay

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Journal of Measurement Science and Instrumentation 2014年第4期5卷 20-28页

作者： V F Kravchenko V I Lutsenko I V Lutsenko D O Popov A G Laush V N Gudkov Kotel'nikov Institute of Radio Engineering and Electronics Russian Academy of Sciences Usikov Institute of Radiophysics and Electronics of National Academy of Sciences of Ukraine Co Ltd. Navis-Ukraine

The paper considers the possibility of correction of zenith tropospheric delays, and calculates it with the standard model, which takes into account the values of the refractive index of the troposphere at the time of measurement. Based on the experimental research, this empirical model of correction for zenith tropospheric delays can reduce the measurement er- ror of coordinates to about 30 % and altitude to about 40 %.

关键词： zenith tropospheric delays satellite navigation signal global positioning system (GPS) global navigation satel-lite system (GLONASS)

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