PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-20:57:20
G02     201.2          26.8               15.0 +/-    1.12      28.0 +/-    1.12  0.080 / 0.120
G06     166.0          61.3               14.0 +/-    0.78      15.7 +/-    0.78  0.070 / 0.150
G17     24.9           57.4               12.3 +/-    0.96      14.3 +/-    0.96  0.040 / 0.030
G19     336.0          69.4               11.6 +/-    0.46      12.3 +/-    0.46  0.030 / 0.030
G24     305.4          33.9               10.2 +/-    1.65      16.6 +/-    1.65  0.030 / 0.030
G28     94.6           36.1               12.0 +/-    1.09      18.7 +/-    1.09  0.040 / 0.030