PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-10:42:30
G07     330.8          57.1                3.0 +/-    0.82       3.4 +/-    0.82  0.030 / 0.060
G08     103.1          50.0                4.9 +/-    0.74       6.1 +/-    0.74  0.030 / 0.070
G09     188.0          76.2                4.0 +/-    1.00       4.1 +/-    1.00  0.110 / 0.110
G11     146.4          10.4               -5.6 +/-   13.63     -15.4 +/-   13.63  0.080 / 0.110
G16     45.2           12.6                1.2 +/-    1.16       3.1 +/-    1.16  0.040 / 0.050
G23     154.2          48.3                6.0 +/-    0.76       7.7 +/-    0.76  0.040 / 0.050
G27     58.6           32.9                3.0 +/-    0.84       4.9 +/-    0.84  0.090 / 0.240
G28     234.2          26.3                7.2 +/-    1.40      13.7 +/-    1.40  0.190 / 0.250
G30     297.2          30.4                3.1 +/-    1.31       5.3 +/-    1.31  0.040 / 0.080