PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-14:42:30
G02     201.3          17.2                9.2 +/-    2.52      21.7 +/-    2.52  0.160 / 0.190
G06     168.1          54.7               10.8 +/-    0.94      12.9 +/-    0.94  0.260 / 0.240
G13     227.5          13.7               10.1 +/-   13.12      26.1 +/-   13.12  0.110 / 0.150
G17     23.1           59.3                8.9 +/-    0.80      10.2 +/-    0.80  0.100 / 0.110
G19     307.5          70.1                8.7 +/-    0.66       9.2 +/-    0.66  0.170 / 0.950
G24     309.6          30.5                8.1 +/-    1.53      14.0 +/-    1.53  0.330 / 0.810
G28     86.6           40.4                7.6 +/-    1.64      10.9 +/-    1.64  0.040 / 0.040
G30     157.6          17.0                9.5 +/-    0.84      22.4 +/-    0.84  0.040 / 0.040