PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-03:58:00
G05     49.1           15.4                3.8 +/-    2.12       9.4 +/-    2.12  0.120 / 0.340
G10     236.3          12.3                6.4 +/-   25.42      16.8 +/-   25.42  0.120 / 0.320
G13     75.8           36.5                8.4 +/-    0.86      13.0 +/-    0.86  0.100 / 0.170
G15     124.0          52.4                9.7 +/-    0.25      11.8 +/-    0.25  0.090 / 0.200
G16     313.3          12.9                7.4 +/-    3.21      19.4 +/-    3.21  0.130 / 0.370
G20     256.5          55.3                9.6 +/-    1.82      11.4 +/-    1.82  0.190 / 0.370
G21     312.9          46.8                7.9 +/-    0.86      10.4 +/-    0.86  0.060 / 0.070
G25     199.8          11.0                5.1 +/-    3.14      14.0 +/-    3.14  0.050 / 0.080
G26     285.8          20.8                9.7 +/-    0.93      20.9 +/-    0.93  0.210 / 0.310
G29     156.4          72.9                9.3 +/-    0.57       9.7 +/-    0.57  0.380 / 0.230