PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-16:12:30
G02     201.3          22.7               10.4 +/-    2.35      21.4 +/-    2.35  0.080 / 0.130
G06     168.0          57.8                9.9 +/-    0.75      11.5 +/-    0.75  0.110 / 0.110
G13     223.5          11.0               10.4 +/-    1.76      28.3 +/-    1.76  0.040 / 0.050
G17     21.7           59.4                8.4 +/-    1.18       9.5 +/-    1.18  0.040 / 0.040
G19     338.2          70.2                8.6 +/-    0.51       9.0 +/-    0.51  0.050 / 0.080
G24     307.5          31.5                8.7 +/-    0.96      14.8 +/-    0.96  0.050 / 0.080
G28     87.6           42.6                8.6 +/-    1.18      12.0 +/-    1.18  0.050 / 0.030
G30     157.0          10.3                8.3 +/-    8.53      23.0 +/-    8.53  0.050 / 0.030