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               13.1 +/-    2.30      29.5 +/-    2.30  0.160 / 0.190
G05     44.9           45.1               12.9 +/-    0.67      17.4 +/-    0.67  0.150 / 0.160
G12     180.4          10.8               20.1 +/-    5.52      55.0 +/-    5.52  0.110 / 0.390
G13     110.3          29.5               17.6 +/-    1.12      31.1 +/-    1.12  0.110 / 0.270
G15     151.3          30.4               18.4 +/-    0.78      32.0 +/-    0.78  0.040 / 0.050
G18     226.5          20.1               17.1 +/-    2.85      37.5 +/-    2.85  0.030 / 0.040
G20     251.1          84.3               13.8 +/-    0.20      13.9 +/-    0.20  0.020 / 0.020
G21     290.0          31.7               14.4 +/-    2.84      24.3 +/-    2.84  0.020 / 0.020
G25     210.9          31.4               16.0 +/-    2.32      27.2 +/-    2.32  0.030 / 0.030
G29     0.0            80.7               14.0 +/-    0.26      14.2 +/-    0.26  0.040 / 0.030