PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-19:12:30
G02     213.3200       50.9510         14.5717 +/-  1.4863   18.1667 +/-  1.4863  0.040 / 0.080
G06     71.7550        77.2018         12.1719 +/-  0.6769   12.4494 +/-  0.6769  0.040 / 0.080
G12     317.8288       33.7756         10.0625 +/-  1.9733   16.3417 +/-  1.9733  0.050 / 0.090
G17     55.8028        32.8459          9.9331 +/-  0.3548   16.4240 +/-  0.3548  0.040 / 0.100
G19     37.1913        50.3393         10.7593 +/-  0.3194   13.5129 +/-  0.3194  0.060 / 0.080
G24     273.8780       42.0278         10.2670 +/-  0.8689   14.4592 +/-  0.8689  0.060 / 0.080
G28     120.0509       16.6049         10.8013 +/-  2.2200   25.8333 +/-  2.2200  0.040 / 0.050