PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-20:42:30
G02     65.0           29.1               12.5 +/-    1.64      22.3 +/-    1.64  0.040 / 0.080
G05     52.5           59.6               15.0 +/-    0.51      17.1 +/-    0.51  0.050 / 0.080
G12     183.4          24.2               19.2 +/-    3.41      38.3 +/-    3.41  0.080 / 0.260
G13     123.7          20.3               19.2 +/-    1.28      42.0 +/-    1.28  0.070 / 0.220
G15     160.5          17.5               23.3 +/-    2.81      54.6 +/-    2.81  0.130 / 0.190
G20     212.4          69.7               17.4 +/-    0.95      18.5 +/-    0.95  0.090 / 0.180
G21     277.4          22.5               15.9 +/-    1.11      33.0 +/-    1.11  0.030 / 0.050
G25     221.2          44.3               17.8 +/-    1.77      24.3 +/-    1.77  0.020 / 0.040
G29     336.5          65.0               17.4 +/-    0.74      19.0 +/-    0.74  0.020 / 0.050