PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-09:12:40
G07     44.5           69.6                5.6 +/-    0.61       5.9 +/-    0.61  0.030 / 0.020
G08     52.0           40.4                3.8 +/-    1.24       5.5 +/-    1.24  0.030 / 0.030
G09     174.8          35.2                5.6 +/-    0.66       8.8 +/-    0.66  0.160 / 0.190
G11     120.4          33.7                6.7 +/-    1.20      10.9 +/-    1.20  0.060 / 0.320
G17     199.0          13.0                1.6 +/-    2.57       4.2 +/-    2.57  0.030 / 0.040
G18     105.5          15.0                4.8 +/-    2.25      11.8 +/-    2.25  0.030 / 0.040
G23     161.0          11.4                4.1 +/-    0.97      11.0 +/-    0.97  0.130 / 0.080
G27     37.9           10.7                3.1 +/-    2.16       8.6 +/-    2.16  0.150 / 0.110
G28     270.3          50.4                4.8 +/-    2.29       6.0 +/-    2.29  0.150 / 0.290
G30     327.4          56.6                3.6 +/-    0.68       4.2 +/-    0.68  0.120 / 0.280