PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-14:43:10
G01     105.1          26.3                9.3 +/-    0.87      17.7 +/-    0.87  0.210 / 0.370
G07     110.9          53.4                9.5 +/-    0.89      11.5 +/-    0.89  0.200 / 0.440
G08     41.7           17.2                7.2 +/-    1.05      16.9 +/-    1.05  0.070 / 0.160
G09     173.5          11.0               13.1 +/-    1.88      35.6 +/-    1.88  0.100 / 0.160
G11     83.8           40.4                8.1 +/-    0.77      11.7 +/-    0.77  0.040 / 0.030
G13     309.7          28.0                7.1 +/-    1.24      12.9 +/-    1.24  0.040 / 0.030
G17     205.9          42.0               11.4 +/-    1.65      16.0 +/-    1.65  0.040 / 0.040
G19     209.2          16.1               11.4 +/-    3.21      27.6 +/-    3.21  0.040 / 0.050
G28     321.2          61.0                9.2 +/-    0.72      10.3 +/-    0.72  0.040 / 0.060
G30     18.5           77.8                9.5 +/-    0.60       9.7 +/-    0.60  0.040 / 0.070