PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-17:42:30
G02     230.0          69.4               12.4 +/-    0.69      13.2 +/-    0.69  0.030 / 0.050
G06     42.5           62.7               10.6 +/-    0.47      11.7 +/-    0.47  0.040 / 0.050
G12     321.6          48.4               10.3 +/-    0.52      13.2 +/-    0.52  0.240 / 0.460
G17     69.4           22.4                8.9 +/-    1.74      18.4 +/-    1.74  0.270 / 0.270
G19     55.0           39.5               10.5 +/-    0.93      15.4 +/-    0.93  0.070 / 0.080
G24     252.0          37.3               11.2 +/-    1.72      17.1 +/-    1.72  0.050 / 0.100
G25     316.2          12.9                7.6 +/-    4.31      19.9 +/-    4.31  0.080 / 0.150