PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-18:43:00
G02     205.2          39.9               17.2 +/-    0.73      25.1 +/-    0.73  0.060 / 0.130
G06     149.2          74.2               12.9 +/-    0.59      13.3 +/-    0.59  0.060 / 0.130
G12     309.4          17.8               11.8 +/-    2.15      27.5 +/-    2.15  0.060 / 0.080
G17     39.5           46.4               11.4 +/-    1.15      15.0 +/-    1.15  0.060 / 0.070
G19     14.0           61.2               12.2 +/-    0.85      13.8 +/-    0.85  0.060 / 0.040
G24     291.1          40.2                9.6 +/-    4.63      13.9 +/-    4.63  0.080 / 0.030
G28     105.1          32.2               11.8 +/-    1.25      19.7 +/-    1.25  0.230 / 0.100