PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/05-08:57:40
G01     319.1          18.5                2.7 +/-    0.87       6.2 +/-    0.87  0.100 / 0.300
G08     257.7          13.5                3.9 +/-    1.22      10.1 +/-    1.22  0.130 / 0.260
G10     80.2           52.1                3.5 +/-    0.87       4.3 +/-    0.87  0.030 / 0.040
G11     302.7          23.3                2.5 +/-    1.73       5.1 +/-    1.73  0.030 / 0.050
G14     297.5          71.2                3.7 +/-    0.67       3.9 +/-    0.67  0.100 / 0.170
G18     303.8          41.9                3.5 +/-    0.93       5.0 +/-    0.93  0.170 / 0.220
G20     105.4          29.0                4.2 +/-    0.84       7.6 +/-    0.84  0.050 / 0.060
G22     301.8          13.5               -1.9 +/-    3.47      -4.9 +/-    3.47  0.050 / 0.060
G31     176.1          41.5                5.7 +/-    0.77       8.1 +/-    0.77  0.170 / 0.310
G32     355.8          69.9                3.9 +/-    0.48       4.1 +/-    0.48  0.170 / 0.280