PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-07:12:40
G10     278.2          44.9                6.6 +/-    1.32       8.9 +/-    1.32  0.040 / 0.030
G13     38.2           10.2                0.3 +/-    6.43       0.9 +/-    6.43  0.040 / 0.030
G15     50.8           39.9                5.5 +/-    1.37       8.1 +/-    1.37  0.100 / 0.060
G20     318.0          63.7                6.4 +/-    1.12       7.1 +/-    1.12  0.090 / 0.050
G21     42.8           76.1                6.7 +/-    0.53       6.9 +/-    0.53  0.110 / 0.630
G24     111.2          19.6                6.1 +/-    1.15      13.6 +/-    1.15  0.080 / 0.560
G27     314.5          24.4                4.2 +/-    1.51       8.3 +/-    1.51  0.100 / 0.120
G29     166.0          17.6                5.0 +/-    1.38      11.8 +/-    1.38  0.080 / 0.100
G32     207.1          12.8                3.9 +/-    2.53      10.3 +/-    2.53  0.050 / 0.060