PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-04:57:40
G05     46.8           21.9                3.0 +/-    2.23       6.3 +/-    2.23  0.190 / 0.220
G13     86.4           36.2                6.3 +/-    0.97       9.8 +/-    0.97  0.210 / 0.220
G15     134.0          46.8                7.6 +/-    0.49      10.0 +/-    0.49  0.060 / 0.050
G20     252.1          60.2                4.4 +/-    0.68       4.9 +/-    0.68  0.060 / 0.050
G21     305.8          41.9                4.0 +/-    1.19       5.7 +/-    1.19  0.110 / 0.070
G25     204.2          17.4                4.4 +/-    4.09      10.4 +/-    4.09  0.060 / 0.060
G26     294.2          20.9                5.0 +/-    0.80      10.9 +/-    0.80  0.390 / 0.270
G29     145.0          81.7                5.3 +/-    0.27       5.4 +/-    0.27  0.150 / 0.170