PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-17:57:30
G02     29.2           59.0               16.0 +/-    0.67      18.3 +/-    0.67  0.030 / 0.040
G05     152.9          57.1               19.0 +/-    0.76      22.2 +/-    0.76  0.020 / 0.040
G06     52.2           18.8               12.5 +/-    0.71      28.4 +/-    0.71  0.040 / 0.060
G12     204.5          70.9               15.8 +/-    0.80      16.6 +/-    0.80  0.040 / 0.060
G20     197.8          23.9               18.8 +/-    2.26      37.6 +/-    2.26  0.070 / 0.160
G25     297.8          54.5               15.8 +/-    1.15      19.0 +/-    1.15  0.080 / 0.160
G29     307.0          28.9               13.7 +/-    1.47      24.6 +/-    1.47  0.030 / 0.040