PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-15:57:30
G02     209.5          45.8                9.6 +/-    0.91      12.8 +/-    0.91  0.060 / 0.080
G06     99.4           78.5                9.1 +/-    0.51       9.2 +/-    0.51  0.050 / 0.090
G12     315.7          30.6                8.7 +/-    1.50      15.1 +/-    1.50  0.080 / 0.120
G17     49.0           38.3                9.3 +/-    1.26      14.0 +/-    1.26  0.070 / 0.090
G19     19.0           59.0                9.2 +/-    0.76      10.5 +/-    0.76  0.030 / 0.030
G24     278.8          43.0                8.1 +/-    1.04      11.2 +/-    1.04  0.030 / 0.030
G28     114.3          22.1                8.9 +/-    1.85      18.7 +/-    1.85  0.070 / 0.030