PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-15:12:50
G01     43.0           18.5                6.9 +/-    3.38      15.8 +/-    3.38  0.170 / 0.250
G06     175.8          35.5               11.1 +/-    2.25      17.4 +/-    2.25  0.110 / 0.210
G13     242.7          24.4               11.2 +/-    1.86      22.1 +/-    1.86  0.070 / 0.080
G15     276.5          13.4                6.6 +/-    1.11      17.1 +/-    1.11  0.080 / 0.090
G17     1.8            71.5                7.6 +/-    0.48       8.0 +/-    0.48  0.340 / 0.350
G19     272.1          69.2                7.2 +/-    0.61       7.7 +/-    0.61  0.260 / 0.250
G24     318.2          14.9                4.2 +/-    3.47      10.4 +/-    3.47  0.110 / 0.250
G28     67.5           48.3                6.5 +/-    1.60       8.4 +/-    1.60  0.080 / 0.220
G30     153.9          32.9                8.7 +/-    1.33      14.4 +/-    1.33  0.170 / 0.190