PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-10:57:30
G01     114.7          20.8                5.5 +/-    1.17      11.9 +/-    1.17  0.080 / 0.100
G08     43.0           25.6                4.1 +/-    0.98       8.0 +/-    0.98  0.070 / 0.110
G09     174.8          19.5                6.9 +/-    1.37      15.4 +/-    1.37  0.100 / 0.170
G11     98.3           40.1                6.6 +/-    0.66       9.6 +/-    0.66  0.090 / 0.160
G13     316.4          21.1                2.5 +/-    1.95       5.3 +/-    1.95  0.090 / 0.210
G17     202.3          31.8                7.0 +/-    1.45      11.8 +/-    1.45  0.080 / 0.230
G28     302.4          59.1                4.7 +/-    1.27       5.3 +/-    1.27  0.040 / 0.030
G30     352.7          71.2                3.5 +/-    0.95       3.7 +/-    0.95  0.040 / 0.030