PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-09:28:10
G01     221.0813       12.1077          3.2732 +/-  2.1751    8.7177 +/-  2.1751  0.050 / 0.100
G03     272.3465       68.5626          4.5317 +/-  0.5369    4.8308 +/-  0.5369  0.040 / 0.090
G09     298.8545       13.6886          3.6174 +/-  2.2858    9.2858 +/-  2.2858  0.030 / 0.040
G14     93.5075        18.2744          3.1786 +/-  1.5876    7.2963 +/-  1.5876  0.040 / 0.040
G16     140.8881       51.8513          7.2432 +/-  1.2652    8.9351 +/-  1.2652  0.040 / 0.060
G22     200.1309       63.9713          5.4737 +/-  0.7397    6.0192 +/-  0.7397  0.040 / 0.060
G23     311.7781       41.2564          4.2297 +/-  0.9341    6.0291 +/-  0.9341  0.160 / 0.270
G26     85.8776        54.8953          4.9187 +/-  0.5025    5.8671 +/-  0.5025  0.100 / 0.170
G31     47.9045        26.2929          3.3775 +/-  1.4779    6.4087 +/-  1.4779  0.140 / 0.390