PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-06:43:10
G01     299.7553       37.2816          5.8079 +/-  0.9631    8.8453 +/-  0.9631  0.040 / 0.080
G10     112.7293       35.9149          4.9061 +/-  0.3947    7.6564 +/-  0.3947  0.040 / 0.080
G11     270.7758       29.2558          4.5817 +/-  1.6927    8.1499 +/-  1.6927  0.090 / 0.220
G14     14.7350        62.2732          3.8503 +/-  0.8239    4.2901 +/-  0.8239  0.080 / 0.160
G18     121.1478       10.9411          2.4763 +/-  2.3774    6.7696 +/-  2.3774  0.070 / 0.090
G22     312.0989       32.9457          3.0717 +/-  1.2790    5.0691 +/-  1.2790  0.070 / 0.080
G25     70.6446        17.1300          3.5169 +/-  0.7539    8.3034 +/-  0.7539  0.050 / 0.110
G31     155.9325       72.7757          5.9762 +/-  0.9806    6.2265 +/-  0.9806  0.060 / 0.100
G32     42.8746        47.8915          3.4302 +/-  0.6793    4.4433 +/-  0.6793  0.030 / 0.040