PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-20:27:20
G02     55.0           37.3               10.9 +/-    0.94      16.6 +/-    0.94  0.040 / 0.090
G05     73.4           69.1               11.2 +/-    0.42      11.9 +/-    0.42  0.060 / 0.080
G12     185.8          36.7               12.3 +/-    1.38      19.0 +/-    1.38  0.090 / 0.070
G13     133.1          12.1               16.2 +/-    2.16      43.2 +/-    2.16  0.060 / 0.070
G20     204.8          56.3               12.3 +/-    0.76      14.4 +/-    0.76  0.120 / 0.370
G21     267.7          15.1               13.5 +/-    2.22      33.4 +/-    2.22  0.130 / 0.320
G25     236.0          54.1               12.0 +/-    3.02      14.5 +/-    3.02  0.200 / 0.380