PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-19:42:40
G07     318.3          51.7               12.4 +/-    0.79      15.3 +/-    0.79  0.050 / 0.060
G08     121.5          47.2               16.6 +/-    1.05      21.6 +/-    1.05  0.050 / 0.060
G09     241.0          82.4               13.4 +/-    0.94      13.5 +/-    0.94  0.030 / 0.050
G16     43.9           15.1               10.0 +/-    2.22      24.9 +/-    2.22  0.030 / 0.050
G23     150.1          49.7               15.2 +/-    0.53      19.2 +/-    0.53  0.030 / 0.030
G27     65.6           35.5               13.5 +/-    1.82      21.3 +/-    1.82  0.030 / 0.030
G28     230.1          21.6               17.2 +/-    2.83      36.4 +/-    2.83  0.180 / 0.340
G30     295.2          30.7               13.7 +/-    1.29      23.7 +/-    1.29  0.130 / 0.190