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               10.2 +/-    0.60      11.8 +/-    0.60  0.050 / 0.040
G05     150.2          59.4               13.0 +/-    0.59      14.8 +/-    0.59  0.050 / 0.050
G06     53.4           17.1                8.3 +/-    2.70      19.7 +/-    2.70  0.030 / 0.030
G12     201.0          68.5               11.4 +/-    0.58      12.1 +/-    0.58  0.020 / 0.030
G20     198.1          26.1               12.5 +/-    4.05      23.8 +/-    4.05  0.100 / 0.230
G25     294.4          55.9                9.2 +/-    3.91      10.9 +/-    3.91  0.160 / 0.220
G29     308.6          30.6                9.0 +/-    1.22      15.5 +/-    1.22  0.030 / 0.030