PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-14:57:30
G01     47.4           23.1                5.8 +/-    0.56      11.9 +/-    0.56  0.060 / 0.200
G06     177.2          28.5               10.4 +/-    0.73      18.9 +/-    0.73  0.090 / 0.200
G13     249.2          28.4                8.5 +/-    1.13      15.3 +/-    1.13  0.040 / 0.070
G15     282.9          14.9                6.4 +/-    1.59      15.8 +/-    1.59  0.050 / 0.090
G17     343.3          76.5                8.3 +/-    0.49       8.6 +/-    0.49  0.020 / 0.030
G19     255.2          64.8                8.1 +/-    0.91       8.8 +/-    0.91  0.020 / 0.030
G28     57.9           51.3                7.2 +/-    0.63       9.0 +/-    0.63  0.050 / 0.130
G30     151.3          39.8               10.2 +/-    1.12      14.8 +/-    1.12  0.050 / 0.130