PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-06:57:50
G01     219.5          11.5                4.3 +/-    0.93      11.6 +/-    0.93  0.040 / 0.040
G03     262.8          70.7                4.6 +/-    0.85       4.8 +/-    0.85  0.040 / 0.040
G09     298.3          12.0                2.5 +/-   10.87       6.5 +/-   10.87  0.150 / 0.360
G14     92.5           20.2                3.0 +/-    2.24       6.6 +/-    2.24  0.160 / 0.450
G16     137.6          51.9                6.3 +/-    0.43       7.7 +/-    0.43  0.110 / 0.240
G22     204.4          63.6                5.4 +/-    0.39       5.9 +/-    0.39  0.110 / 0.220
G23     316.1          46.7                4.6 +/-    0.91       6.0 +/-    0.91  0.210 / 0.390
G26     82.7           54.0                5.6 +/-    0.85       6.7 +/-    0.85  0.300 / 0.350
G31     49.1           24.2                2.9 +/-    2.40       5.8 +/-    2.40  0.050 / 0.060