PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-07:27:30
G01     224.5          15.4                6.1 +/-    1.82      15.0 +/-    1.82  0.040 / 0.050
G03     285.7          66.7                4.3 +/-    1.40       4.6 +/-    1.40  0.040 / 0.040
G09     296.3          11.5                4.4 +/-   15.82      11.8 +/-   15.82  0.110 / 0.190
G14     89.5           21.2                3.1 +/-    1.50       6.6 +/-    1.50  0.130 / 0.240
G16     147.1          46.8                6.8 +/-    1.55       8.9 +/-    1.55  0.050 / 0.090
G22     210.1          69.0                7.4 +/-    0.97       7.9 +/-    0.97  0.050 / 0.100
G23     308.1          37.5                3.8 +/-    1.09       5.8 +/-    1.09  0.030 / 0.080
G26     96.7           55.2               -2.4 +/-   37.90      -2.8 +/-   37.90  0.040 / 0.080
G31     45.6           31.1                2.9 +/-    0.76       5.0 +/-    0.76  0.110 / 0.260