PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-03:28:10
G01     319.2          16.9                4.8 +/-    1.06      11.4 +/-    1.06  0.220 / 0.300
G08     257.0          13.9                7.9 +/-    1.52      20.1 +/-    1.52  0.210 / 0.240
G10     76.4           54.9                5.7 +/-    0.68       6.8 +/-    0.68  0.030 / 0.040
G11     302.8          24.2                7.0 +/-    1.59      13.9 +/-    1.59  0.030 / 0.040
G14     297.3          71.2                6.0 +/-    0.77       6.3 +/-    0.77  0.050 / 0.060
G18     100.0          31.1                6.1 +/-    0.73      10.4 +/-    0.73  0.050 / 0.050
G31     177.1          39.6                9.3 +/-    0.82      13.6 +/-    0.82  0.050 / 0.070
G32     359.8          69.3                6.0 +/-    0.51       6.4 +/-    0.51  0.070 / 0.070