PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/06-13:58:00
G07     34.0           69.6                8.4 +/-    0.90       8.9 +/-    0.90  0.200 / 0.310
G08     55.6           44.0                8.7 +/-    0.94      11.9 +/-    0.94  0.200 / 0.430
G09     177.8          41.2               11.1 +/-    1.23      15.8 +/-    1.23  0.030 / 0.050
G11     124.0          31.8                8.3 +/-    1.33      14.0 +/-    1.33  0.030 / 0.030
G18     109.0          13.6               10.0 +/-    2.04      25.7 +/-    2.04  0.160 / 0.150
G23     160.0          11.7                9.3 +/-    1.25      25.0 +/-    1.25  0.150 / 0.130
G27     38.3           12.0                8.4 +/-    6.48      22.6 +/-    6.48  0.220 / 0.170
G28     267.4          49.5               11.0 +/-    4.79      14.0 +/-    4.79  0.360 / 0.310
G30     326.0          55.3                9.3 +/-    0.51      11.0 +/-    0.51  0.030 / 0.030