PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/12-23:58:00
G10     249.3          27.1                9.7 +/-    2.17      18.0 +/-    2.17  0.090 / 0.140
G13     54.3           29.6                9.3 +/-    1.56      16.4 +/-    1.56  0.110 / 0.140
G15     88.2           57.5               10.7 +/-    1.14      12.4 +/-    1.14  0.040 / 0.050
G16     298.1          15.4                7.0 +/-    1.61      17.2 +/-    1.61  0.040 / 0.050
G20     267.9          49.5               10.5 +/-    3.23      13.4 +/-    3.23  0.090 / 0.160
G21     331.9          58.6                9.5 +/-    0.81      11.0 +/-    0.81  0.110 / 0.190
G26     270.1          16.0                9.2 +/-    1.60      22.4 +/-    1.60  0.030 / 0.040
G29     162.5          50.8               12.2 +/-    0.95      15.2 +/-    0.95  0.040 / 0.050