PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-22:28:10
G02     215.2          59.9               12.2 +/-    0.40      13.8 +/-    0.40  0.060 / 0.110
G06     58.8           74.3                9.8 +/-    0.40      10.1 +/-    0.40  0.080 / 0.080
G12     318.5          36.0               10.4 +/-    1.55      16.2 +/-    1.55  0.030 / 0.020
G17     55.0           35.3               10.0 +/-    1.58      15.8 +/-    1.58  0.030 / 0.020
G19     36.6           50.9                9.7 +/-    1.98      12.2 +/-    1.98  0.050 / 0.050
G24     266.1          41.8               11.5 +/-    2.87      16.2 +/-    2.87  0.050 / 0.060
G28     122.2          14.0               12.8 +/-    3.53      32.6 +/-    3.53  0.140 / 0.340