PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-08:43:10
G07     44.3           69.5                4.5 +/-    0.96       4.8 +/-    0.96  0.020 / 0.020
G08     52.0           40.4                3.0 +/-    1.23       4.3 +/-    1.23  0.030 / 0.030
G09     174.5          35.0                5.7 +/-    1.27       9.0 +/-    1.27  0.240 / 0.260
G11     120.4          33.6                5.3 +/-    1.97       8.7 +/-    1.97  0.210 / 0.230
G17     198.9          13.0                2.8 +/-    1.79       7.4 +/-    1.79  0.030 / 0.040
G18     105.5          15.0                4.5 +/-    1.95      11.1 +/-    1.95  0.030 / 0.040
G23     161.1          11.8                3.7 +/-    2.20      10.0 +/-    2.20  0.220 / 0.270
G27     38.0           11.0                2.8 +/-    2.29       7.5 +/-    2.29  0.230 / 0.320
G28     270.0          50.3                5.5 +/-    2.23       7.0 +/-    2.23  0.160 / 0.340
G30     327.2          56.4                3.5 +/-    0.89       4.1 +/-    0.89  0.170 / 0.290