PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-14:27:30
G07     24.8           69.1                9.3 +/-    0.96       9.9 +/-    0.96  0.030 / 0.050
G08     59.2           46.4                8.6 +/-    0.80      11.3 +/-    0.80  0.040 / 0.050
G09     178.3          44.8               11.3 +/-    0.49      15.3 +/-    0.49  0.030 / 0.040
G11     127.1          29.8               11.8 +/-    1.71      20.7 +/-    1.71  0.040 / 0.030
G18     111.7          12.0               12.2 +/-    1.46      32.5 +/-    1.46  0.020 / 0.040
G23     159.7          14.2                9.1 +/-    1.12      23.1 +/-    1.12  0.030 / 0.030
G27     39.2           14.4                8.2 +/-    2.49      20.6 +/-    2.49  0.140 / 0.290
G28     263.3          47.7               10.1 +/-    3.59      13.2 +/-    3.59  0.110 / 0.260
G30     323.2          53.0                9.1 +/-    0.59      11.1 +/-    0.59  0.040 / 0.050