PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-19:42:50
G02     32.7           56.1               13.0 +/-    0.60      15.3 +/-    0.60  0.030 / 0.050
G05     146.5          61.9               15.3 +/-    0.49      17.1 +/-    0.49  0.030 / 0.050
G06     55.1           14.5                9.5 +/-    2.77      23.9 +/-    2.77  0.040 / 0.050
G12     196.4          65.2               12.4 +/-    1.04      13.5 +/-    1.04  0.040 / 0.050
G20     198.1          29.2               16.3 +/-    2.86      29.1 +/-    2.86  0.050 / 0.100
G25     288.3          58.1               12.6 +/-    1.48      14.5 +/-    1.48  0.090 / 0.100
G29     309.9          31.6               11.1 +/-    1.47      18.7 +/-    1.47  0.030 / 0.050