The invention discloses a gridding-based
base station network positioning enhancement
information availability monitoring method. The method comprises the steps that a known region covered by a
base station network is equidistantly divided into grids according to longitudes and latitudes, and three-dimensional coordinates of each grid point are obtained; according to the three-dimensional coordinates of each grid point, corresponding virtual GGA information is generated and uploaded to a
data processing center to request generating a virtual observation value of each grid point; the virtual observation values returned by the
data processing center are subject to cycle-slip detection and pseudo-range single-point positioning calculation, observation value
anomaly detection is performed, andthe number of actual available satellites at each grid point is judged; in combination with comprehensive broadcast
ephemeris of the
base station network and the coordinates of the grid points, the number of theoretical available satellites at each grid point is calculated; and then the
utilization rate of the satellites at each grid point in the region covered by the base
station network is calculated. According to the method, uniform monitoring of positioning enhancement information in the region covered by the base
station network is realized from the perspective of a user, and therefore areliable
system with a high-precision positioning enhancement function is enriched and perfected.