Description: Matlab simulation on GPS positioning, you can download to see, it should be pretty useful
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File list (Check if you may need any files):
read_data\brdc3330.07n
.........\brdc3470.07n
.........\eph.dat
.........\eph1.dat
.........\Read_eph.m
gps_constellation_emluator\gps_constellation_emluator.m
..........................\gps_satellite_distribute.m
..........................\gps_satellite_distribute1.fig
..........................\gps_satellite_distribute2.fig
..........................\gps_satellite_distribute3.fig
..........................\PDOP_Value.fig
..........................\Plane_Orbit.fig
..........................\Space_Orbit.fig
..........................\visible_satellite.fig
....kalman\gps_kalman.m
.........._zsy\gps_kalman_zsy.m
....position\gps_position.m
read_data
gps_constellation_emluator
gps_kalman
gps_kalman_zsy
gps_position