PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-14:28:00
G03     191.7          24.0                9.8 +/-    1.73      19.5 +/-    1.73  0.090 / 0.150
G07     286.2          34.8                9.8 +/-    0.96      15.5 +/-    0.96  0.090 / 0.150
G08     146.2          24.0               11.6 +/-    2.51      23.2 +/-    2.51  0.080 / 0.100
G09     320.8          59.0                9.3 +/-    0.73      10.6 +/-    0.73  0.090 / 0.090
G16     43.7           40.7                8.4 +/-    0.74      12.1 +/-    0.74  0.100 / 0.340
G23     106.8          78.3                9.5 +/-    0.76       9.7 +/-    0.76  0.030 / 0.030
G26     43.1           12.9                7.5 +/-    1.98      19.6 +/-    1.98  0.030 / 0.020
G27     103.8          32.1               11.1 +/-    1.17      18.6 +/-    1.17  0.060 / 0.090
G30     271.0          10.8              -12.4 +/-   21.47     -34.1 +/-   21.47  0.060 / 0.080