PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-07:28:00
G10     258.4          32.4                6.0 +/-    2.14      10.0 +/-    2.14  0.090 / 0.210
G13     46.9           24.9                5.7 +/-    2.07      11.2 +/-    2.07  0.110 / 0.240
G15     69.4           53.6                6.1 +/-    0.76       7.4 +/-    0.76  0.100 / 0.190
G16     287.0          14.3                3.3 +/-    1.06       8.5 +/-    1.06  0.130 / 0.210
G20     17.8           64.9                4.6 +/-    0.62       5.1 +/-    0.62  0.050 / 0.040
G21     346.6          66.5                5.7 +/-    0.44       6.2 +/-    0.44  0.050 / 0.040
G26     258.9          11.8                3.8 +/-   12.18      10.2 +/-   12.18  0.050 / 0.050
G27     321.4          12.7                1.2 +/-    3.13       3.1 +/-    3.13  0.050 / 0.030
G29     166.8          40.2                6.0 +/-    0.79       8.7 +/-    0.79  0.050 / 0.030