PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/08-02:57:50
G01     52.1           26.7                4.2 +/-    0.82       7.9 +/-    0.82  0.030 / 0.030
G06     180.0          20.9                6.5 +/-    1.38      13.9 +/-    1.38  0.030 / 0.030
G07     145.6          14.7                5.3 +/-    2.18      13.3 +/-    2.18  0.030 / 0.050
G11     46.0           18.9                2.9 +/-    1.37       6.5 +/-    1.37  0.030 / 0.050
G13     253.9          31.5                5.4 +/-    1.27       9.1 +/-    1.27  0.100 / 0.320
G15     285.0          16.4                4.2 +/-    1.92      10.1 +/-    1.92  0.100 / 0.250
G17     296.3          78.4                7.1 +/-    1.16       7.2 +/-    1.16  0.190 / 0.200
G19     243.8          58.7                7.6 +/-    1.04       8.7 +/-    1.04  0.140 / 0.300
G28     50.0           53.3                4.4 +/-    0.67       5.4 +/-    0.67  0.130 / 0.190
G30     147.5          39.5                7.4 +/-    1.00      10.9 +/-    1.00  0.110 / 0.250