PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-08:27:50
G01     227.4          19.4                6.5 +/-    2.75      14.5 +/-    2.75  0.040 / 0.030
G03     293.1          67.3                5.1 +/-    0.55       5.5 +/-    0.55  0.030 / 0.030
G14     83.2           26.4                2.2 +/-    1.75       4.2 +/-    1.75  0.030 / 0.040
G16     149.5          41.0                4.5 +/-    1.24       6.4 +/-    1.24  0.040 / 0.050
G22     223.6          72.6                6.2 +/-    0.69       6.4 +/-    0.69  0.170 / 0.260
G23     306.9          38.2                4.2 +/-    2.05       6.3 +/-    2.05  0.250 / 0.340
G26     104.3          53.4                4.9 +/-    0.59       5.9 +/-    0.59  0.100 / 0.170
G31     44.7           33.8                2.9 +/-    1.16       4.7 +/-    1.16  0.090 / 0.190
G32     95.9           9.6                 4.1 +/-    1.67      11.4 +/-    1.67  0.050 / 0.080