Visibility Analysis of GNSS Satellites in Mountainous Area
A novel method of analyzing the visibility of GNSS satellites in mountainous area is proposed by taking advantage of target area’s digital elevation model (DEM) data and GNSS almanac. The key point is calculating the obstacle elevation on the basis of target points’ visible range. Simulation results show that both different target points at the same time and same point at different time have different situation of visible satellites on the condition with or without obstacle. On the other hand, this method contributes lots to determine the distribution of pseudolites in mountainous area.
B. Zhang et al., "Visibility Analysis of GNSS Satellites in Mountainous Area", Advanced Materials Research, Vols. 588-589, pp. 888-892, 2012