PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-02:12:30
G07     352.0          63.7                5.2 +/-    0.55       5.8 +/-    0.55  0.090 / 0.110
G08     80.0           52.3                5.1 +/-    0.98       6.3 +/-    0.98  0.060 / 0.100
G09     183.8          62.3                7.5 +/-    0.54       8.4 +/-    0.54  0.130 / 0.350
G11     139.2          19.6                6.4 +/-    2.08      14.2 +/-    2.08  0.120 / 0.270
G23     158.6          30.6                5.9 +/-    0.94      10.2 +/-    0.94  0.040 / 0.040
G27     45.7           24.2                4.0 +/-    2.28       7.9 +/-    2.28  0.030 / 0.040
G28     247.6          38.7                4.8 +/-    1.28       7.1 +/-    1.28  0.090 / 0.100
G30     312.7          44.5                4.3 +/-    0.64       5.9 +/-    0.64  0.080 / 0.210