PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-15:28:10
G07     305.1          45.3               10.9 +/-    1.10      14.6 +/-    1.10  0.020 / 0.030
G08     132.1          39.2               15.3 +/-    1.47      22.5 +/-    1.47  0.030 / 0.030
G09     306.6          77.6               11.5 +/-    0.55      11.7 +/-    0.55  0.080 / 0.190
G16     41.9           23.7                8.7 +/-    1.11      17.5 +/-    1.11  0.080 / 0.230
G23     142.1          60.2               15.0 +/-    0.76      17.0 +/-    0.76  0.050 / 0.070
G27     80.5           37.2               12.1 +/-    0.88      18.5 +/-    0.88  0.040 / 0.080
G28     223.5          11.7                5.7 +/-   23.28      15.3 +/-   23.28  0.100 / 0.240
G30     285.2          21.9                9.9 +/-    2.05      20.9 +/-    2.05  0.100 / 0.190