PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-00:57:40
G02     215.5          61.7               13.2 +/-    0.74      14.8 +/-    0.74  0.070 / 0.030
G06     58.1           74.6               10.5 +/-    0.35      10.8 +/-    0.35  0.080 / 0.050
G12     318.5          35.6               10.8 +/-    1.56      16.9 +/-    1.56  0.090 / 0.030
G17     54.6           36.2               11.1 +/-    1.54      17.2 +/-    1.54  0.100 / 0.050
G19     38.6           49.8               10.3 +/-    1.89      13.0 +/-    1.89  0.030 / 0.010
G24     265.7          41.6               12.7 +/-    1.57      18.1 +/-    1.57  0.030 / 0.010
G28     122.8          13.3               14.1 +/-    2.36      36.5 +/-    2.36  0.170 / 0.330