PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-08:42:30
G01     224.0          15.0               -2.6 +/-   21.27      -6.4 +/-   21.27  0.150 / 0.240
G03     284.0          67.1              -12.8 +/-   14.66     -13.8 +/-   14.66  0.180 / 0.290
G09     296.4          11.2               -8.3 +/-   24.30     -22.5 +/-   24.30  0.100 / 0.090
G14     90.0           20.8                1.6 +/-    1.14       3.4 +/-    1.14  0.060 / 0.080
G16     145.6          47.7               18.3 +/-   12.41      23.8 +/-   12.41  0.040 / 0.030
G22     207.0          68.2               43.5 +/-   33.48      46.5 +/-   33.48  0.040 / 0.040
G23     308.6          38.1                2.1 +/-    1.04       3.2 +/-    1.04  0.160 / 0.400
G26     94.3           55.0              -73.5 +/-   76.28     -87.6 +/-   76.28  0.210 / 0.450
G31     46.1           30.0               15.3 +/-   17.06      26.7 +/-   17.06  0.140 / 0.170