PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-02:28:00
G07     317.2          51.4                4.8 +/-    0.68       5.9 +/-    0.68  0.190 / 0.390
G08     117.3          46.5                7.2 +/-    0.73       9.4 +/-    0.73  0.150 / 0.470
G09     252.3          82.9                5.6 +/-    1.16       5.6 +/-    1.16  0.230 / 0.230
G16     43.0           20.7                3.4 +/-    2.77       7.4 +/-    2.77  0.120 / 0.310
G23     150.3          55.5                6.2 +/-    0.99       7.3 +/-    0.99  0.040 / 0.040
G27     67.3           35.7                4.6 +/-    1.04       7.2 +/-    1.04  0.060 / 0.050
G28     229.0          20.4                5.1 +/-    3.21      11.2 +/-    3.21  0.030 / 0.020
G30     293.0          28.5                3.0 +/-    1.59       5.4 +/-    1.59  0.030 / 0.020