PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-14:58:00
G01     40.8           15.4                9.1 +/-    1.45      22.5 +/-    1.45  0.060 / 0.100
G06     175.0          39.9               11.5 +/-    0.96      16.7 +/-    0.96  0.060 / 0.130
G13     239.0          21.6                9.3 +/-    1.41      19.7 +/-    1.41  0.200 / 0.170
G15     272.3          12.1                9.9 +/-    2.39      26.5 +/-    2.39  0.130 / 0.190
G17     9.7            68.0               10.3 +/-    0.33      11.0 +/-    0.33  0.050 / 0.060
G19     285.5          71.1                9.6 +/-    0.49      10.0 +/-    0.49  0.050 / 0.060
G24     317.0          18.4                8.8 +/-    2.39      20.1 +/-    2.39  0.030 / 0.030
G28     73.2           46.2               11.0 +/-    1.06      14.6 +/-    1.06  0.030 / 0.020
G30     155.1          28.5               11.7 +/-    1.56      21.1 +/-    1.56  0.160 / 0.190