PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-17:58:10
G02     31.5           57.1               11.1 +/-    0.50      13.0 +/-    0.50  0.080 / 0.230
G05     150.2          59.4               13.9 +/-    1.17      15.8 +/-    1.17  0.080 / 0.210
G06     53.4           17.1                8.2 +/-    0.63      19.4 +/-    0.63  0.030 / 0.050
G12     201.0          68.5               10.2 +/-    1.53      10.9 +/-    1.53  0.040 / 0.040
G20     198.1          26.1               12.8 +/-    1.37      24.4 +/-    1.37  0.040 / 0.050
G25     294.4          55.9               10.0 +/-    1.60      11.8 +/-    1.60  0.050 / 0.060
G29     308.6          30.6                9.5 +/-    0.76      16.4 +/-    0.76  0.040 / 0.040