PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-05:28:10
G05     49.3           14.9                2.6 +/-    2.25       6.5 +/-    2.25  0.140 / 0.340
G10     236.6          12.6                6.1 +/-   12.83      16.1 +/-   12.83  0.180 / 0.370
G13     75.4           36.6                7.2 +/-    0.76      11.1 +/-    0.76  0.170 / 0.170
G15     122.3          52.7                7.4 +/-    0.53       9.0 +/-    0.53  0.110 / 0.210
G16     313.2          12.9                5.2 +/-    2.60      13.6 +/-    2.60  0.160 / 0.520
G20     270.5          67.8                8.6 +/-    0.78       9.2 +/-    0.78  0.200 / 0.320
G21     313.6          47.4                6.1 +/-    1.21       8.0 +/-    1.21  0.040 / 0.040
G25     199.8          10.7                3.0 +/-    2.89       8.4 +/-    2.89  0.040 / 0.040
G26     285.6          20.7                8.2 +/-    1.11      17.7 +/-    1.11  0.050 / 0.090
G29     156.5          72.0                6.6 +/-    0.54       6.9 +/-    0.54  0.050 / 0.060