PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-10:27:50
G01     316.2          24.4                3.3 +/-    2.13       6.5 +/-    2.13  0.130 / 0.180
G10     90.6           47.8                4.6 +/-    0.84       5.9 +/-    0.84  0.120 / 0.170
G11     295.3          26.2                7.1 +/-    2.79      13.6 +/-    2.79  0.040 / 0.020
G14     322.4          71.4                4.1 +/-    0.67       4.4 +/-    0.67  0.040 / 0.020
G18     295.0          46.8                6.9 +/-    9.09       9.0 +/-    9.09  0.050 / 0.040
G20     111.4          23.7                6.5 +/-    1.31      13.0 +/-    1.31  0.040 / 0.050
G22     305.7          20.0                3.5 +/-    3.31       7.7 +/-    3.31  0.050 / 0.050
G25     94.2           11.2                0.1 +/-   26.00       0.1 +/-   26.00  0.050 / 0.050
G31     174.7          49.1                5.8 +/-    0.96       7.4 +/-    0.96  0.110 / 0.200
G32     7.8            66.1                4.1 +/-    0.86       4.4 +/-    0.86  0.120 / 0.230