PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-21:57:50
G07     309.6          47.6                7.9 +/-    0.57      10.3 +/-    0.57  0.370 / 0.730
G08     127.7          42.3                9.8 +/-    0.65      13.8 +/-    0.65  0.440 / 0.460
G09     295.3          79.8                7.2 +/-    0.32       7.3 +/-    0.32  0.200 / 0.220
G16     42.2           22.7                6.4 +/-    1.53      13.2 +/-    1.53  0.140 / 0.250
G23     145.9          59.4               10.1 +/-    0.62      11.5 +/-    0.62  0.040 / 0.060
G27     74.7           36.8               10.0 +/-    0.77      15.4 +/-    0.77  0.040 / 0.070
G28     225.6          15.5                9.5 +/-   10.79      23.4 +/-   10.79  0.030 / 0.060
G30     290.0          27.5                8.5 +/-    2.36      15.7 +/-    2.36  0.040 / 0.060