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               13.1 +/-    1.15      15.1 +/-    1.15  0.080 / 0.070
G06     57.1           74.2               11.2 +/-    0.36      11.6 +/-    0.36  0.040 / 0.050
G12     319.1          37.1               10.2 +/-    1.01      15.6 +/-    1.01  0.050 / 0.070
G17     59.8           29.6               10.5 +/-    2.27      18.5 +/-    2.27  0.080 / 0.070
G19     42.7           47.1               10.9 +/-    0.75      14.2 +/-    0.75  0.060 / 0.120
G24     267.1          41.3               12.0 +/-    0.71      17.1 +/-    0.71  0.040 / 0.080
G28     123.5          12.7               12.2 +/-    1.52      32.2 +/-    1.52  0.030 / 0.030