PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/12-15:28:00
G07     22.7           68.9                9.4 +/-    0.97      10.0 +/-    0.97  0.040 / 0.060
G08     60.6           47.4                9.2 +/-    0.61      11.9 +/-    0.61  0.040 / 0.060
G09     178.8          45.9               12.5 +/-    1.65      16.6 +/-    1.65  0.030 / 0.040
G11     128.1          29.3               12.2 +/-    1.54      21.7 +/-    1.54  0.030 / 0.040
G18     112.4          11.7                9.5 +/-    3.53      25.5 +/-    3.53  0.110 / 0.280
G23     159.3          14.1               11.8 +/-    0.83      30.0 +/-    0.83  0.080 / 0.160
G27     39.4           14.8                9.0 +/-    2.46      22.4 +/-    2.46  0.040 / 0.090
G28     262.6          47.4               11.8 +/-    0.93      15.4 +/-    0.93  0.040 / 0.070
G30     323.0          52.9               11.2 +/-    0.73      13.7 +/-    0.73  0.140 / 0.400