PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-15:27:50
G01     40.2           15.2                6.7 +/-    1.98      16.5 +/-    1.98  0.100 / 0.190
G06     173.9          39.5               12.2 +/-    0.90      17.9 +/-    0.90  0.090 / 0.180
G13     236.0          22.3                8.7 +/-    2.25      18.2 +/-    2.25  0.040 / 0.040
G15     270.4          12.0                7.9 +/-    2.15      21.0 +/-    2.15  0.040 / 0.030
G17     353.6          72.1                8.5 +/-    0.52       8.9 +/-    0.52  0.050 / 0.090
G19     280.6          70.5                7.8 +/-    0.94       8.2 +/-    0.94  0.070 / 0.080
G24     316.4          19.0                5.9 +/-    2.86      13.3 +/-    2.86  0.040 / 0.040
G28     65.6           51.1                7.6 +/-    1.33       9.4 +/-    1.33  0.040 / 0.040
G30     154.4          26.2                8.0 +/-    0.79      15.3 +/-    0.79  0.100 / 0.240