PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/09-06:57:40
G07     318.8          52.3                4.6 +/-    0.99       5.6 +/-    0.99  0.040 / 0.040
G08     115.1          46.6                8.8 +/-    1.34      11.6 +/-    1.34  0.020 / 0.030
G09     233.8          83.4                4.5 +/-    0.64       4.5 +/-    0.64  0.030 / 0.060
G16     42.9           21.0                3.4 +/-    1.19       7.4 +/-    1.19  0.040 / 0.050
G23     150.6          56.5                7.7 +/-    0.80       9.0 +/-    0.80  0.080 / 0.230
G27     67.1           35.6                3.8 +/-    0.63       6.0 +/-    0.63  0.080 / 0.220
G28     229.1          20.3                6.1 +/-    1.94      13.3 +/-    1.94  0.070 / 0.210
G30     291.9          26.6                5.6 +/-    2.14      10.6 +/-    2.14  0.060 / 0.230