PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-19:58:00
G02     77.0           19.1               13.4 +/-    0.85      30.1 +/-    0.85  0.170 / 0.280
G05     44.9           45.1               12.8 +/-    0.75      17.2 +/-    0.75  0.120 / 0.390
G12     180.4          10.8               21.8 +/-    3.26      59.7 +/-    3.26  0.120 / 0.140
G13     110.3          29.5               16.5 +/-    0.68      29.2 +/-    0.68  0.090 / 0.200
G15     151.3          30.4               20.0 +/-    2.31      34.8 +/-    2.31  0.070 / 0.170
G18     226.5          20.1               16.3 +/-    2.43      35.7 +/-    2.43  0.070 / 0.160
G20     251.1          84.3               15.5 +/-    0.97      15.6 +/-    0.97  0.030 / 0.050
G21     290.0          31.7               14.2 +/-    1.52      24.0 +/-    1.52  0.040 / 0.060
G25     210.9          31.4               17.6 +/-    2.43      29.8 +/-    2.43  0.050 / 0.050
G29     0.0            80.7               13.2 +/-    0.71      13.4 +/-    0.71  0.040 / 0.040