PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/29-02:57:50
G07     39.1           69.5                5.1 +/-    0.98       5.5 +/-    0.98  0.060 / 0.130
G08     54.6           43.3                4.6 +/-    1.31       6.3 +/-    1.31  0.060 / 0.130
G09     179.3          41.8                6.9 +/-    0.78       9.7 +/-    0.78  0.030 / 0.040
G11     124.1          31.8                5.5 +/-    2.12       9.3 +/-    2.12  0.050 / 0.040
G17     199.4          11.0               -4.8 +/-   14.41     -13.1 +/-   14.41  0.140 / 0.260
G23     160.7          12.3                5.3 +/-    2.39      14.1 +/-    2.39  0.100 / 0.210
G27     37.7           10.0                2.7 +/-    4.48       7.5 +/-    4.48  0.170 / 0.540
G28     270.3          50.9                5.0 +/-    3.32       6.3 +/-    3.32  0.150 / 0.440
G30     330.8          58.5                3.8 +/-    0.60       4.3 +/-    0.60  0.050 / 0.050