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          3.7483 +/-  2.1096    5.7086 +/-  2.1096  0.050 / 0.040
G10     112.7293       35.9149          3.9179 +/-  0.7826    6.1141 +/-  0.7826  0.020 / 0.040
G11     270.7758       29.2558          3.6765 +/-  0.8750    6.5398 +/-  0.8750  0.060 / 0.080
G14     14.7350        62.2732          3.0229 +/-  0.8791    3.3681 +/-  0.8791  0.060 / 0.080
G18     121.1478       10.9411          2.0567 +/-  1.7456    5.6224 +/-  1.7456  0.050 / 0.060
G22     312.0989       32.9457          2.3604 +/-  0.7108    3.8952 +/-  0.7108  0.050 / 0.070
G25     70.6446        17.1300          2.7087 +/-  1.5251    6.3953 +/-  1.5251  0.040 / 0.050
G31     155.9325       72.7757          4.5485 +/-  0.5882    4.7390 +/-  0.5882  0.040 / 0.050
G32     42.8746        47.8915          3.0629 +/-  1.1054    3.9674 +/-  1.1054  0.060 / 0.090