PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-18:58:00
G02     33.3           55.6               14.3 +/-    0.89      17.0 +/-    0.89  0.030 / 0.040
G05     148.0          61.5               16.7 +/-    0.55      18.7 +/-    0.55  0.030 / 0.040
G06     55.0           14.8               10.4 +/-    2.18      26.1 +/-    2.18  0.040 / 0.060
G12     197.1          65.4               13.5 +/-    1.41      14.7 +/-    1.41  0.030 / 0.050
G20     198.2          29.0               17.1 +/-    2.29      30.6 +/-    2.29  0.050 / 0.060
G25     289.1          57.7               15.2 +/-    0.99      17.6 +/-    0.99  0.050 / 0.050
G29     310.2          32.0               12.2 +/-    0.99      20.5 +/-    0.99  0.030 / 0.050