PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-17:12:30
G02     216.5          57.9               13.0 +/-    0.70      15.1 +/-    0.70  0.050 / 0.070
G06     57.1           74.2               10.8 +/-    0.52      11.2 +/-    0.52  0.050 / 0.080
G12     319.1          37.1                9.4 +/-    0.94      14.4 +/-    0.94  0.040 / 0.080
G17     59.8           29.6               10.0 +/-    0.89      17.6 +/-    0.89  0.040 / 0.060
G19     42.7           47.1               10.3 +/-    0.34      13.5 +/-    0.34  0.060 / 0.100
G24     267.1          41.3               11.7 +/-    1.65      16.6 +/-    1.65  0.040 / 0.110
G28     123.5          12.7               11.2 +/-    1.60      29.5 +/-    1.60  0.030 / 0.030