PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/22-19:28:00
G07     308.0          46.8               11.6 +/-    1.38      15.3 +/-    1.38  0.080 / 0.070
G08     131.5          40.9               14.3 +/-    0.58      20.6 +/-    0.58  0.050 / 0.080
G09     299.9          78.9               10.9 +/-    0.63      11.1 +/-    0.63  0.110 / 0.610
G16     42.2           22.6                9.8 +/-    1.94      20.2 +/-    1.94  0.140 / 0.250
G23     144.5          59.0               13.3 +/-    0.47      15.2 +/-    0.47  0.030 / 0.040
G27     76.5           37.0               12.1 +/-    0.83      18.5 +/-    0.83  0.030 / 0.050
G28     224.9          14.3               14.1 +/-    2.42      35.6 +/-    2.42  0.040 / 0.030
G30     288.2          25.3               11.2 +/-    0.97      21.7 +/-    0.97  0.030 / 0.030