PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-01:58:00
G08     298.4          22.8                6.8 +/-    1.45      14.0 +/-    1.45  0.050 / 0.070
G10     350.6          62.2                6.9 +/-    0.73       7.7 +/-    0.73  0.050 / 0.070
G14     224.8          42.2               10.6 +/-    0.51      15.0 +/-    0.51  0.070 / 0.080
G18     53.0           55.4                7.6 +/-    0.43       9.0 +/-    0.43  0.080 / 0.090
G21     142.1          46.5               10.4 +/-    1.19      13.7 +/-    1.19  0.030 / 0.040
G24     64.0           29.0                7.4 +/-    0.91      13.3 +/-    0.91  0.030 / 0.030
G27     260.0          34.5                9.1 +/-    1.54      14.6 +/-    1.54  0.060 / 0.100
G32     234.5          60.2               11.3 +/-    0.63      12.8 +/-    0.63  0.070 / 0.110