PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-13:42:40
G07     25.9           68.0                6.8 +/-    0.49       7.2 +/-    0.49  0.020 / 0.050
G08     66.9           50.0                6.2 +/-    0.60       7.8 +/-    0.60  0.030 / 0.050
G09     181.0          52.6                6.2 +/-    1.79       7.6 +/-    1.79  0.070 / 0.120
G11     130.9          27.5                8.6 +/-    1.40      15.9 +/-    1.40  0.060 / 0.110
G23     158.9          18.5                8.2 +/-    2.41      18.7 +/-    2.41  0.080 / 0.210
G27     41.5           19.1                5.7 +/-    1.06      12.8 +/-    1.06  0.090 / 0.210
G28     253.5          39.5                8.9 +/-    0.96      13.0 +/-    0.96  0.100 / 0.160
G30     321.2          52.0                7.8 +/-    1.15       9.6 +/-    1.15  0.090 / 0.150