PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-21:57:50
G02     221.6          66.0               18.6 +/-    0.71      20.2 +/-    0.71  0.050 / 0.050
G06     47.3           68.2               15.9 +/-    0.50      17.0 +/-    0.50  0.030 / 0.050
G12     320.5          42.4               14.9 +/-    1.03      20.9 +/-    1.03  0.060 / 0.090
G17     60.8           30.9               14.8 +/-    0.95      25.5 +/-    0.95  0.060 / 0.090
G19     43.9           47.0               15.0 +/-    0.89      19.6 +/-    0.89  0.030 / 0.030
G24     257.4          40.0               18.6 +/-    3.94      27.1 +/-    3.94  0.030 / 0.030