PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-08:57:40
G03     210.6          52.9                5.3 +/-    0.82       6.4 +/-    0.82  0.080 / 0.250
G07     263.4          21.9                5.7 +/-    1.23      12.0 +/-    1.23  0.120 / 0.280
G09     314.6          36.5                3.8 +/-    1.12       5.8 +/-    1.12  0.030 / 0.060
G16     80.7           64.8                5.4 +/-    0.43       5.9 +/-    0.43  0.030 / 0.050
G22     185.6          35.0                4.9 +/-    1.59       7.8 +/-    1.59  0.060 / 0.110
G23     334.6          64.3                4.3 +/-    0.52       4.7 +/-    0.52  0.090 / 0.120
G26     49.6           39.9                3.0 +/-    1.45       4.4 +/-    1.45  0.030 / 0.040
G27     127.7          15.6                5.0 +/-    1.50      12.2 +/-    1.50  0.030 / 0.050