PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-21:58:00
G02     221.6          66.0               18.4 +/-    0.61      20.0 +/-    0.61  0.050 / 0.070
G06     47.3           68.2               15.6 +/-    0.74      16.6 +/-    0.74  0.040 / 0.070
G12     320.5          42.4               14.4 +/-    1.35      20.2 +/-    1.35  0.050 / 0.080
G17     60.8           30.9               13.9 +/-    1.28      23.9 +/-    1.28  0.060 / 0.080
G19     43.9           47.0               13.8 +/-    0.53      18.0 +/-    0.53  0.050 / 0.090
G24     257.4          40.0               18.5 +/-    1.34      26.9 +/-    1.34  0.050 / 0.110