PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-21:57:40
G02     65.0           29.6               10.0 +/-    1.64      17.7 +/-    1.64  0.100 / 0.180
G05     51.4           57.8                9.7 +/-    0.40      11.3 +/-    0.40  0.080 / 0.170
G12     182.9          23.1               12.4 +/-    2.31      25.3 +/-    2.31  0.030 / 0.050
G13     123.1          20.8               13.2 +/-    2.13      28.6 +/-    2.13  0.020 / 0.040
G15     160.8          17.6               16.1 +/-    2.10      37.6 +/-    2.10  0.080 / 0.270
G20     212.6          70.8               12.5 +/-    0.87      13.2 +/-    0.87  0.090 / 0.240
G21     277.7          22.5               10.5 +/-    1.39      21.8 +/-    1.39  0.050 / 0.080
G25     219.4          43.4               13.5 +/-    1.70      18.7 +/-    1.70  0.050 / 0.080
G29     336.0          64.9               11.2 +/-    1.09      12.2 +/-    1.09  0.030 / 0.050