PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/08-20:57:30
G02     44.3           46.6               11.0 +/-    0.49      14.5 +/-    0.49  0.030 / 0.050
G05     111.5          70.8               14.1 +/-    0.67      14.9 +/-    0.67  0.030 / 0.060
G12     188.4          49.8               13.8 +/-    1.25      17.4 +/-    1.25  0.040 / 0.050
G20     200.5          43.4               17.5 +/-    1.43      24.1 +/-    1.43  0.030 / 0.050
G25     257.9          60.1               14.3 +/-    0.83      16.2 +/-    0.83  0.050 / 0.060
G29     318.8          41.9               13.7 +/-    1.91      19.3 +/-    1.91  0.060 / 0.080