PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-17:12:40
G07     326.3          55.3                9.7 +/-    1.20      11.5 +/-    1.20  0.040 / 0.060
G08     111.1          50.8               11.9 +/-    0.62      14.9 +/-    0.62  0.040 / 0.050
G09     202.1          78.1               10.0 +/-    1.08      10.2 +/-    1.08  0.040 / 0.080
G11     149.5          10.3               -2.1 +/-   25.37      -6.0 +/-   25.37  0.040 / 0.080
G23     152.3          40.8               12.8 +/-    1.31      18.4 +/-    1.31  0.050 / 0.060
G27     58.8           33.4                9.1 +/-    1.10      14.9 +/-    1.10  0.060 / 0.050
G28     234.3          26.6               12.3 +/-    1.02      23.2 +/-    1.02  0.110 / 0.200
G30     299.4          33.4                9.9 +/-    1.26      16.2 +/-    1.26  0.080 / 0.180