PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-02:27:50
G07     310.5          48.2                5.2 +/-    1.19       6.7 +/-    1.19  0.130 / 0.280
G08     124.2          42.8                6.8 +/-    0.73       9.5 +/-    0.73  0.120 / 0.250
G09     293.3          80.6                3.5 +/-    1.38       3.5 +/-    1.38  0.040 / 0.050
G16     42.0           25.8                2.8 +/-    1.10       5.4 +/-    1.10  0.040 / 0.050
G23     146.6          61.7                7.4 +/-    0.98       8.2 +/-    0.98  0.060 / 0.170
G27     74.3           36.6                2.8 +/-    0.63       4.3 +/-    0.63  0.090 / 0.160
G28     225.7          15.7                6.3 +/-    2.58      15.4 +/-    2.58  0.060 / 0.070
G30     288.5          24.9                5.1 +/-    1.82      10.0 +/-    1.82  0.040 / 0.060