PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/11-09:57:40
G10     296.4          51.9                4.4 +/-    1.16       5.5 +/-    1.16  0.240 / 0.570
G14     209.5          11.3               -1.8 +/-   16.80      -4.8 +/-   16.80  0.290 / 0.440
G15     46.2           28.3                0.2 +/-    0.93       0.4 +/-    0.93  0.040 / 0.040
G20     350.1          65.4                2.0 +/-    0.91       2.2 +/-    0.91  0.040 / 0.040
G21     99.0           71.5                3.4 +/-    1.53       3.6 +/-    1.53  0.060 / 0.110
G24     96.9           25.8                4.6 +/-    0.62       8.8 +/-    0.62  0.070 / 0.120
G27     303.8          32.3                4.6 +/-    1.11       7.6 +/-    1.11  0.030 / 0.050
G32     210.7          26.8                5.9 +/-    1.53      11.1 +/-    1.53  0.030 / 0.040