PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-08:58:00
G03     219.5          59.7               -1.8 +/-   13.41      -2.1 +/-   13.41  0.090 / 0.100
G07     257.4          17.5                3.9 +/-    2.42       9.1 +/-    2.42  0.080 / 0.090
G09     311.0          30.1                3.6 +/-    1.04       6.2 +/-    1.04  0.050 / 0.070
G16     100.7          65.3               14.9 +/-   13.49      16.3 +/-   13.49  0.050 / 0.060
G22     187.8          42.5                4.9 +/-    0.84       6.9 +/-    0.84  0.100 / 0.180
G23     327.9          57.8                4.7 +/-    0.92       5.5 +/-    0.92  0.090 / 0.160
G26     55.4           45.6              -25.5 +/-   63.48     -34.0 +/-   63.48  0.030 / 0.040
G27     133.3          10.7               -1.4 +/-   22.87      -3.9 +/-   22.87  0.030 / 0.040
G31     58.6           11.3                6.5 +/-   14.61      17.5 +/-   14.61  0.160 / 0.270