PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-04:57:50
G08     275.0817       21.5369          5.7452 +/-  1.1998   12.1790 +/-  1.1998  0.030 / 0.010
G10     39.8581        62.1141          3.7389 +/-  0.4491    4.1712 +/-  0.4491  0.030 / 0.010
G11     315.4421       13.0941          5.9248 +/-  4.1058   15.4238 +/-  4.1058  0.100 / 0.110
G14     250.1987       61.4131          6.2772 +/-  1.3695    7.0434 +/-  1.3695  0.090 / 0.080
G18     80.4540        44.0592          3.9510 +/-  0.6443    5.3968 +/-  0.6443  0.110 / 0.070
G21     152.1367       24.9184          5.6838 +/-  1.4447   11.1266 +/-  1.4447  0.110 / 0.070
G24     45.1188        18.0862          3.6026 +/-  0.6885    8.3079 +/-  0.6885  0.060 / 0.110
G27     237.8983       21.8585          8.0663 +/-  3.3749   16.9677 +/-  3.3749  0.060 / 0.130
G31     179.9825       20.9264          6.1388 +/-  0.7735   13.2066 +/-  0.7735  0.080 / 0.200
G32     296.2449       75.7471          4.2792 +/-  0.7090    4.4008 +/-  0.7090  0.090 / 0.190