PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/04-03:57:50
G07     351.8          63.6                5.5 +/-    0.69       6.0 +/-    0.69  0.060 / 0.090
G08     79.9           51.9                6.2 +/-    1.18       7.7 +/-    1.18  0.050 / 0.110
G09     183.3          62.6                7.6 +/-    0.62       8.5 +/-    0.62  0.040 / 0.050
G11     138.8          19.3                8.6 +/-    1.51      19.1 +/-    1.51  0.030 / 0.050
G23     158.7          31.9                6.8 +/-    1.94      11.5 +/-    1.94  0.030 / 0.020
G27     46.0           24.5                4.6 +/-    2.40       9.1 +/-    2.40  0.040 / 0.030
G28     247.0          38.2                5.5 +/-    1.76       8.2 +/-    1.76  0.040 / 0.030
G30     311.3          43.2                4.6 +/-    1.14       6.3 +/-    1.14  0.040 / 0.040