PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-02:12:40
G01     65.3           32.0                4.7 +/-    0.27       7.9 +/-    0.27  0.030 / 0.030
G07     140.0          26.9                6.9 +/-    1.82      13.0 +/-    1.82  0.030 / 0.050
G11     52.1           29.4                3.8 +/-    1.65       6.8 +/-    1.65  0.040 / 0.050
G13     269.4          36.4                6.5 +/-    1.02      10.0 +/-    1.02  0.040 / 0.050
G15     297.6          16.5                4.7 +/-    1.55      11.2 +/-    1.55  0.060 / 0.120
G17     242.9          71.7                7.3 +/-    0.98       7.6 +/-    0.98  0.050 / 0.130
G19     228.3          46.9                8.7 +/-    1.09      11.4 +/-    1.09  0.050 / 0.140
G28     29.0           57.8                2.9 +/-    0.55       3.4 +/-    0.55  0.060 / 0.160
G30     139.3          52.5                6.6 +/-    0.67       8.1 +/-    0.67  0.040 / 0.080