PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-21:43:00
G02     76.0           20.6               13.3 +/-    1.10      28.8 +/-    1.10  0.110 / 0.180
G05     45.0           45.6               13.9 +/-    0.85      18.5 +/-    0.85  0.070 / 0.170
G12     180.1          10.8               28.1 +/-    1.89      76.9 +/-    1.89  0.090 / 0.130
G13     110.7          29.2               18.5 +/-    0.33      32.9 +/-    0.33  0.110 / 0.140
G15     152.6          29.3               23.1 +/-    1.12      41.1 +/-    1.12  0.170 / 0.310
G18     226.1          18.9               28.7 +/-    4.75      64.8 +/-    4.75  0.120 / 0.390
G20     248.4          84.5               17.4 +/-    0.58      17.4 +/-    0.58  0.030 / 0.060
G21     289.0          30.7               18.8 +/-    1.58      32.4 +/-    1.58  0.030 / 0.050
G25     210.1          31.4               25.2 +/-    0.92      42.9 +/-    0.92  0.030 / 0.030
G29     353.1          79.1               19.8 +/-    0.71      20.2 +/-    0.71  0.020 / 0.040