PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-19:13:10
G10     245.7          24.3               14.5 +/-    0.92      28.8 +/-    0.92  0.060 / 0.060
G13     58.5           31.6                9.2 +/-    1.24      15.6 +/-    1.24  0.050 / 0.050
G15     99.1           58.0               11.5 +/-    1.22      13.3 +/-    1.22  0.060 / 0.140
G16     301.0          15.7                5.8 +/-    1.63      14.1 +/-    1.63  0.080 / 0.140
G20     263.5          47.9               12.6 +/-    3.53      16.4 +/-    3.53  0.040 / 0.040
G21     326.8          55.4               11.0 +/-    0.70      13.1 +/-    0.70  0.040 / 0.030
G26     273.7          17.5               10.1 +/-    2.01      23.6 +/-    2.01  0.110 / 0.240
G29     161.6          57.4               12.4 +/-    0.31      14.4 +/-    0.31  0.230 / 0.270