PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/28-14:58:10
G02     206.1          37.0                9.8 +/-    0.72      15.0 +/-    0.72  0.120 / 0.090
G06     138.5          75.2               10.4 +/-    0.93      10.7 +/-    0.93  0.090 / 0.060
G12     312.0          24.2                7.6 +/-    0.61      15.2 +/-    0.61  0.060 / 0.090
G17     42.5           43.6                7.7 +/-    1.08      10.6 +/-    1.08  0.070 / 0.110
G19     3.5            63.9                8.0 +/-    0.51       8.8 +/-    0.51  0.040 / 0.020
G24     289.7          41.5                6.9 +/-    3.80       9.7 +/-    3.80  0.040 / 0.020
G28     107.2          27.8                9.8 +/-    0.89      18.0 +/-    0.89  0.050 / 0.030