PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-20:12:50
G02     31.0           57.4               12.1 +/-    0.47      14.1 +/-    0.47  0.030 / 0.050
G05     147.2          61.0               15.0 +/-    0.82      16.9 +/-    0.82  0.040 / 0.040
G06     54.5           15.2               10.3 +/-    1.96      25.5 +/-    1.96  0.040 / 0.060
G12     197.1          66.3               11.9 +/-    1.44      12.9 +/-    1.44  0.040 / 0.060
G20     197.9          28.1               18.0 +/-    1.16      32.7 +/-    1.16  0.060 / 0.130
G25     290.0          57.9               11.6 +/-    1.09      13.5 +/-    1.09  0.060 / 0.090
G29     308.9          30.4               12.0 +/-    1.63      20.8 +/-    1.63  0.030 / 0.050