PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-07:28:10
G10     301.1          53.5                4.0 +/-    1.61       4.8 +/-    1.61  0.080 / 0.090
G14     210.2          13.9                3.0 +/-    2.32       7.6 +/-    2.32  0.080 / 0.090
G15     45.7           25.3                3.1 +/-    0.83       6.1 +/-    0.83  0.040 / 0.050
G20     357.2          65.1                5.1 +/-    1.13       5.6 +/-    1.13  0.040 / 0.040
G21     104.2          71.2                4.4 +/-    0.66       4.6 +/-    0.66  0.040 / 0.050
G24     94.6           27.0                7.3 +/-    0.94      13.7 +/-    0.94  0.050 / 0.060
G27     300.3          34.0                4.3 +/-    1.05       7.0 +/-    1.05  0.090 / 0.560
G32     211.9          28.8                5.0 +/-    1.19       9.0 +/-    1.19  0.120 / 0.450