PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-08:42:50
G08     268.7          17.3                8.1 +/-    1.28      19.1 +/-    1.28  0.150 / 0.250
G10     63.8           57.9                6.7 +/-    0.67       7.7 +/-    0.67  0.170 / 0.250
G11     311.3          17.2                4.5 +/-    1.73      10.7 +/-    1.73  0.210 / 0.350
G18     311.9          32.2                3.5 +/-    1.02       5.9 +/-    1.02  0.080 / 0.290
G20     103.8          17.7                5.6 +/-    1.44      13.1 +/-    1.44  0.240 / 0.350
G21     155.0          14.2                6.8 +/-    3.29      17.3 +/-    3.29  0.250 / 0.290
G27     230.4          14.7                8.8 +/-    1.96      22.0 +/-    1.96  0.140 / 0.180
G31     176.3          33.8                6.7 +/-    1.66      10.9 +/-    1.66  0.170 / 0.220
G32     350.3          72.8                6.6 +/-    0.66       6.9 +/-    0.66  0.060 / 0.110