PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-14:12:30
G07     6.9            66.9                8.2 +/-    0.72       8.8 +/-    0.72  0.050 / 0.040
G08     68.2           50.1                8.8 +/-    0.44      11.1 +/-    0.44  0.050 / 0.050
G09     179.3          52.3               10.7 +/-    0.44      13.1 +/-    0.44  0.070 / 0.050
G11     132.8          25.3               10.8 +/-    4.19      21.0 +/-    4.19  0.050 / 0.040
G23     159.0          20.8                9.4 +/-    1.42      20.2 +/-    1.42  0.020 / 0.030
G27     42.0           19.7                7.7 +/-    1.75      17.0 +/-    1.75  0.030 / 0.030
G28     255.0          43.2                9.5 +/-    2.44      13.2 +/-    2.44  0.110 / 0.220
G30     317.0          47.8                8.6 +/-    0.84      11.2 +/-    0.84  0.090 / 0.200