PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/07-04:57:40
G07     317.2          51.5                4.0 +/-    0.40       5.0 +/-    0.40  0.160 / 0.320
G08     116.7          46.2                6.6 +/-    0.36       8.7 +/-    0.36  0.230 / 0.380
G09     249.7          83.3                7.5 +/-    0.84       7.5 +/-    0.84  0.030 / 0.040
G16     42.7           23.1                2.3 +/-    1.93       4.7 +/-    1.93  0.070 / 0.040
G23     150.2          56.9                6.1 +/-    0.72       7.1 +/-    0.72  0.060 / 0.260
G27     67.9           35.8                5.0 +/-    0.72       7.9 +/-    0.72  0.100 / 0.190
G28     228.6          19.9                5.9 +/-    2.14      13.1 +/-    2.14  0.040 / 0.050
G30     291.9          27.0                4.4 +/-    2.27       8.2 +/-    2.27  0.030 / 0.050