PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-08:12:30
G07     333.6          58.3                3.9 +/-    1.12       4.5 +/-    1.12  0.110 / 0.110
G08     96.3           51.3                6.5 +/-    0.66       8.1 +/-    0.66  0.090 / 0.110
G09     179.0          69.6                4.5 +/-    0.47       4.8 +/-    0.47  0.070 / 0.170
G11     144.8          13.6                4.1 +/-    2.98      10.6 +/-    2.98  0.070 / 0.140
G23     155.9          42.8                6.1 +/-    0.94       8.6 +/-    0.94  0.040 / 0.050
G27     56.1           32.6                3.4 +/-    0.61       5.7 +/-    0.61  0.030 / 0.040
G28     236.9          28.6                7.9 +/-    1.77      14.3 +/-    1.77  0.040 / 0.050
G30     300.9          33.6                3.5 +/-    2.23       5.6 +/-    2.23  0.040 / 0.060