PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-02:12:40
G01     76.5           33.3                3.0 +/-    1.32       4.9 +/-    1.32  0.040 / 0.040
G07     134.5          35.5                4.8 +/-    0.66       7.6 +/-    0.66  0.040 / 0.050
G11     59.2           35.6                3.2 +/-    0.93       5.1 +/-    0.93  0.050 / 0.030
G13     281.6          37.4                5.5 +/-    1.81       8.3 +/-    1.81  0.040 / 0.030
G15     306.0          14.7                0.3 +/-    2.79       0.8 +/-    2.79  0.080 / 0.090
G17     226.1          63.6                5.9 +/-    0.94       6.5 +/-    0.94  0.070 / 0.090
G19     220.9          38.2                5.7 +/-    1.25       8.6 +/-    1.25  0.070 / 0.080
G28     12.3           60.1                1.9 +/-    0.75       2.2 +/-    0.75  0.070 / 0.120
G30     130.0          61.9                4.4 +/-    0.45       5.0 +/-    0.45  0.060 / 0.070