PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-16:57:30
G01     49.6667        24.8307          9.3217 +/-  1.3390   18.2849 +/-  1.3390  0.070 / 0.190
G06     177.3678       25.9393         13.2340 +/-  2.1791   25.3117 +/-  2.1791  0.080 / 0.180
G11     43.8330        11.8111          8.9691 +/-  2.3996   24.0495 +/-  2.3996  0.050 / 0.070
G13     252.0926       30.0950         12.4051 +/-  1.4248   21.6810 +/-  1.4248  0.050 / 0.070
G15     287.2450       14.9830          8.3617 +/-  1.5070   20.8071 +/-  1.5070  0.030 / 0.030
G17     330.4071       78.3686         11.5838 +/-  0.5310   11.8013 +/-  0.5310  0.030 / 0.030
G19     249.2277       62.5498         12.4286 +/-  0.8759   13.8176 +/-  0.8759  0.100 / 0.250
G28     53.1819        52.6626          9.9631 +/-  0.3357   12.1768 +/-  0.3357  0.100 / 0.250
G30     150.0235       43.4750         12.5643 +/-  1.7742   17.3105 +/-  1.7742  0.180 / 0.340