PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-14:28:00
G03     222.8          64.9                7.7 +/-    1.30       8.4 +/-    1.30  0.110 / 0.320
G09     305.7          20.9                6.3 +/-    1.34      13.6 +/-    1.34  0.100 / 0.280
G14     101.9          15.1                7.8 +/-    2.03      19.4 +/-    2.03  0.040 / 0.090
G16     114.6          61.9               10.2 +/-    0.53      11.4 +/-    0.53  0.040 / 0.070
G22     186.5          47.1               10.0 +/-    2.18      13.1 +/-    2.18  0.030 / 0.060
G23     327.7          56.9                6.7 +/-    0.69       7.8 +/-    0.69  0.040 / 0.070
G26     61.3           47.8                6.4 +/-    0.56       8.3 +/-    0.56  0.040 / 0.050
G31     55.1           14.6                5.1 +/-    2.97      12.9 +/-    2.97  0.030 / 0.050