PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-02:57:40
G08     271.9          20.6               10.1 +/-    2.28      22.0 +/-    2.28  0.130 / 0.170
G10     46.6           61.3                7.2 +/-    0.90       8.0 +/-    0.90  0.340 / 0.260
G11     314.1          14.8                5.9 +/-    2.87      14.8 +/-    2.87  0.020 / 0.020
G14     255.7          63.6                9.3 +/-    0.69      10.2 +/-    0.69  0.020 / 0.020
G18     84.5           41.4                6.6 +/-    1.34       9.5 +/-    1.34  0.100 / 0.180
G21     152.8          21.2                8.3 +/-    3.12      17.6 +/-    3.12  0.080 / 0.200
G24     43.4           16.1                6.7 +/-    2.61      16.2 +/-    2.61  0.210 / 0.320
G27     235.4          19.8               12.3 +/-    2.69      27.1 +/-    2.69  0.150 / 0.330
G31     180.1          23.1               12.2 +/-    3.84      24.9 +/-    3.84  0.040 / 0.040
G32     305.3          75.5                8.2 +/-    0.94       8.4 +/-    0.94  0.050 / 0.040