PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-02:27:50
G01     59.9           30.5                3.6 +/-    1.15       6.3 +/-    1.15  0.040 / 0.050
G06     181.7          13.5                5.1 +/-    7.95      13.1 +/-    7.95  0.040 / 0.050
G07     142.4          22.2                7.2 +/-    2.22      15.1 +/-    2.22  0.020 / 0.030
G11     49.3           25.5                2.9 +/-    1.15       5.6 +/-    1.15  0.020 / 0.030
G13     263.2          35.0                4.2 +/-    2.15       6.7 +/-    2.15  0.200 / 0.270
G15     292.8          16.8                1.6 +/-    1.94       3.7 +/-    1.94  0.240 / 0.270
G17     258.0          75.4                4.0 +/-    0.50       4.1 +/-    0.50  0.050 / 0.080
G19     233.3          51.5                4.3 +/-    2.64       5.3 +/-    2.64  0.050 / 0.080
G28     37.3           56.2                4.8 +/-    0.74       5.7 +/-    0.74  0.120 / 0.100
G30     142.9          47.5                5.8 +/-    0.53       7.6 +/-    0.53  0.050 / 0.090