PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-15:12:40
G01     43.0           18.5                6.3 +/-    1.04      14.3 +/-    1.04  0.070 / 0.230
G06     175.8          35.5               12.0 +/-    1.20      18.9 +/-    1.20  0.080 / 0.220
G13     242.7          24.4                9.9 +/-    1.91      19.5 +/-    1.91  0.060 / 0.100
G15     276.5          13.4                7.9 +/-    1.34      20.4 +/-    1.34  0.060 / 0.090
G17     1.8            71.5                8.7 +/-    0.62       9.1 +/-    0.62  0.150 / 0.390
G19     272.1          69.2                8.0 +/-    0.76       8.5 +/-    0.76  0.170 / 0.430
G24     318.2          14.9                5.8 +/-    1.54      14.5 +/-    1.54  0.040 / 0.030
G28     67.5           48.3                7.8 +/-    0.64      10.0 +/-    0.64  0.020 / 0.040
G30     153.9          32.9               10.6 +/-    0.96      17.5 +/-    0.96  0.070 / 0.150