PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-06:12:30
G10     256.9          32.6                6.6 +/-    1.17      11.0 +/-    1.17  0.040 / 0.040
G13     47.6           24.9                5.4 +/-    2.09      10.6 +/-    2.09  0.040 / 0.040
G15     71.6           54.2                5.5 +/-    0.67       6.6 +/-    0.67  0.120 / 0.330
G16     293.0          13.8                3.5 +/-    1.86       8.9 +/-    1.86  0.120 / 0.340
G20     280.4          55.3                6.2 +/-    2.53       7.3 +/-    2.53  0.050 / 0.090
G21     347.7          66.1                5.6 +/-    0.80       6.1 +/-    0.80  0.080 / 0.080
G26     264.7          12.5                6.3 +/-    1.77      16.5 +/-    1.77  0.090 / 0.190
G29     163.4          37.9                5.9 +/-    0.93       8.8 +/-    0.93  0.100 / 0.200