PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-18:42:30
G02     205.2          39.9               17.6 +/-    1.18      25.7 +/-    1.18  0.060 / 0.130
G06     149.2          74.2               14.6 +/-    0.84      15.1 +/-    0.84  0.060 / 0.130
G12     309.4          17.8               11.6 +/-    1.43      27.0 +/-    1.43  0.060 / 0.120
G17     39.5           46.4               11.0 +/-    0.91      14.5 +/-    0.91  0.060 / 0.120
G19     14.0           61.2               12.6 +/-    0.60      14.1 +/-    0.60  0.060 / 0.100
G24     291.1          40.2               13.0 +/-    0.93      18.8 +/-    0.93  0.060 / 0.100
G28     105.1          32.2               13.2 +/-    0.68      22.1 +/-    0.68  0.110 / 0.060