PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-19:42:40
G10     264.7          38.2               10.8 +/-    1.75      16.2 +/-    1.75  0.050 / 0.040
G13     42.7           19.1                9.2 +/-    2.87      20.7 +/-    2.87  0.050 / 0.040
G15     62.0           50.7               10.3 +/-    0.86      12.9 +/-    0.86  0.100 / 0.510
G16     280.9          13.4                6.7 +/-    3.17      17.4 +/-    3.17  0.210 / 0.290
G20     294.9          59.9               10.3 +/-    0.60      11.7 +/-    0.60  0.030 / 0.040
G21     355.7          69.5               11.0 +/-    0.50      11.6 +/-    0.50  0.030 / 0.040
G24     124.2          12.5               15.6 +/-    2.19      41.2 +/-    2.19  0.200 / 0.290
G27     320.0          16.5                9.4 +/-    1.83      22.6 +/-    1.83  0.170 / 0.200
G29     167.0          34.7               12.6 +/-    1.12      20.1 +/-    1.12  0.120 / 0.470