PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-03:42:40
G07     18.5           68.2                4.0 +/-    0.85       4.2 +/-    0.85  0.040 / 0.100
G08     62.4           47.6                4.3 +/-    0.41       5.6 +/-    0.41  0.040 / 0.080
G09     180.2          49.7                7.6 +/-    0.97       9.6 +/-    0.97  0.030 / 0.030
G11     130.2          27.1                6.1 +/-    0.93      11.3 +/-    0.93  0.040 / 0.030
G23     160.4          19.8                6.1 +/-    1.52      13.6 +/-    1.52  0.050 / 0.060
G27     40.0           15.9                2.8 +/-    1.16       6.9 +/-    1.16  0.050 / 0.060
G28     260.3          46.4                6.2 +/-    0.80       8.1 +/-    0.80  0.100 / 0.240
G30     322.4          52.2                5.3 +/-    1.16       6.5 +/-    1.16  0.110 / 0.260