PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/03-04:57:30
G02     52.5           38.0                3.3 +/-    1.62       5.0 +/-    1.62  0.040 / 0.050
G05     76.2           66.7                4.4 +/-    0.53       4.7 +/-    0.53  0.060 / 0.050
G12     187.9          44.4                7.1 +/-    0.78       9.7 +/-    0.78  0.020 / 0.030
G20     210.5          28.7                7.7 +/-    2.28      13.9 +/-    2.28  0.030 / 0.030
G21     263.4          11.5               -1.6 +/-   13.92      -4.4 +/-   13.92  0.130 / 0.190
G25     256.7          57.1                5.6 +/-    2.23       6.5 +/-    2.23  0.120 / 0.160
G29     321.8          45.3                4.1 +/-    0.59       5.5 +/-    0.59  0.050 / 0.050