PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-07:43:10
G10     273.7          41.7                6.1 +/-    1.32       8.6 +/-    1.32  0.120 / 0.090
G13     39.6           13.9                2.3 +/-    3.83       6.0 +/-    3.83  0.100 / 0.130
G15     53.3           43.2                3.4 +/-    1.05       4.7 +/-    1.05  0.060 / 0.040
G20     35.6           56.4                4.8 +/-    0.75       5.6 +/-    0.75  0.060 / 0.050
G21     21.6           75.3                5.1 +/-    0.54       5.3 +/-    0.54  0.030 / 0.030
G24     115.3          17.7                5.4 +/-    1.64      12.6 +/-    1.64  0.040 / 0.040
G27     315.1          24.0                4.0 +/-    1.48       8.0 +/-    1.48  0.110 / 0.180
G29     168.5          24.9                4.0 +/-    1.02       7.9 +/-    1.02  0.080 / 0.170
G32     205.0          16.1                5.4 +/-    2.13      13.0 +/-    2.13  0.090 / 0.110