PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/09-09:27:50
G07     31.2           69.3                5.2 +/-    0.61       5.5 +/-    0.61  0.030 / 0.030
G08     56.0           43.6                4.7 +/-    1.29       6.5 +/-    1.29  0.040 / 0.030
G09     175.3          40.1                6.3 +/-    1.16       9.2 +/-    1.16  0.270 / 0.220
G11     124.6          31.0                5.7 +/-    1.33       9.7 +/-    1.33  0.300 / 0.220
G18     109.4          12.8                5.4 +/-    1.78      14.0 +/-    1.78  0.130 / 0.350
G23     160.8          15.4                5.5 +/-    0.92      13.5 +/-    0.92  0.140 / 0.280
G27     39.1           14.2                2.7 +/-    2.30       6.9 +/-    2.30  0.030 / 0.030
G28     264.4          47.9                5.3 +/-    2.60       6.8 +/-    2.60  0.030 / 0.030
G30     323.3          53.1                3.6 +/-    0.59       4.4 +/-    0.59  0.160 / 0.330