PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-04:27:40
G07     40.1           69.4                4.1 +/-    0.83       4.3 +/-    0.83  0.080 / 0.090
G08     54.1           42.6                3.8 +/-    1.12       5.3 +/-    1.12  0.110 / 0.090
G09     179.0          41.4                7.9 +/-    0.81      11.3 +/-    0.81  0.040 / 0.050
G11     123.3          31.8                6.0 +/-    1.06      10.1 +/-    1.06  0.050 / 0.040
G17     199.2          11.5               -2.1 +/-   15.68      -5.8 +/-   15.68  0.240 / 0.400
G23     160.9          12.7                6.0 +/-    1.00      15.8 +/-    1.00  0.100 / 0.290
G27     37.7           10.0                0.1 +/-    5.07       0.2 +/-    5.07  0.170 / 0.450
G28     270.3          50.9                5.5 +/-    3.29       6.9 +/-    3.29  0.060 / 0.280
G30     329.7          57.8                3.6 +/-    0.54       4.1 +/-    0.54  0.030 / 0.030