PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/17-07:27:50
G05     50.0           13.4                2.6 +/-    1.55       6.7 +/-    1.55  0.050 / 0.050
G10     238.1          15.7                7.1 +/-    2.17      17.4 +/-    2.17  0.040 / 0.050
G13     71.2           35.4                6.1 +/-    1.52       9.6 +/-    1.52  0.060 / 0.110
G15     117.3          54.3                6.9 +/-    0.56       8.3 +/-    0.56  0.060 / 0.090
G20     251.3          39.6                7.3 +/-    1.19      10.6 +/-    1.19  0.030 / 0.030
G21     319.8          51.6                4.8 +/-    1.04       6.0 +/-    1.04  0.030 / 0.030
G26     288.6          18.6                3.3 +/-    1.14       7.4 +/-    1.14  0.260 / 0.270
G29     152.7          62.7                7.7 +/-    0.43       8.5 +/-    0.43  0.250 / 0.290