PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-09:57:50
G08     271.5          20.1                6.9 +/-    1.62      15.2 +/-    1.62  0.100 / 0.190
G10     53.5           59.3                4.7 +/-    0.76       5.3 +/-    0.76  0.080 / 0.190
G14     257.1          64.1                5.9 +/-    0.32       6.5 +/-    0.32  0.040 / 0.050
G18     314.1          29.8                4.2 +/-    0.92       7.4 +/-    0.92  0.050 / 0.050
G20     90.8           39.6                5.4 +/-    1.04       7.9 +/-    1.04  0.030 / 0.020
G21     153.5          18.2                6.0 +/-    2.19      13.9 +/-    2.19  0.030 / 0.020
G24     41.2           12.2                2.1 +/-    2.20       5.5 +/-    2.20  0.030 / 0.050
G27     237.1          19.7                6.0 +/-    3.15      13.2 +/-    3.15  0.030 / 0.030
G31     179.9          24.6                6.0 +/-    1.69      11.9 +/-    1.69  0.120 / 0.330
G32     296.9          74.1                6.3 +/-    0.41       6.5 +/-    0.41  0.280 / 0.320