PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-20:28:00
G02     274.7044       79.0131          9.2338 +/-  0.6684    9.3883 +/-  0.6684  0.090 / 0.170
G05     169.7643       24.4385         14.6467 +/-  1.2343   28.9912 +/-  1.2343  0.100 / 0.160
G06     40.6481        46.5897          8.7990 +/-  0.4392   11.5974 +/-  0.4392  0.060 / 0.140
G12     318.7954       65.6534          8.5169 +/-  0.6920    9.2526 +/-  0.6920  0.070 / 0.130
G17     81.7964        13.2915          9.5104 +/-  1.1270   24.6434 +/-  1.1270  0.060 / 0.150
G19     69.9214        29.8380          9.6844 +/-  0.8823   17.0168 +/-  0.8823  0.080 / 0.170
G24     236.0396       28.3070         11.9325 +/-  0.6729   21.6599 +/-  0.6729  0.030 / 0.040
G25     317.7168       26.4297          8.5565 +/-  1.6718   16.1859 +/-  1.6718  0.040 / 0.040