PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-10:12:50
G08     271.6          17.8                5.8 +/-    1.81      13.4 +/-    1.81  0.120 / 0.320
G10     60.2           58.7                5.8 +/-    0.96       6.7 +/-    0.96  0.130 / 0.260
G11     312.9          15.6                2.0 +/-    3.23       5.0 +/-    3.23  0.050 / 0.060
G14     261.4          62.4                6.8 +/-    0.76       7.6 +/-    0.76  0.040 / 0.050
G18     312.9          30.5                5.3 +/-    1.19       9.2 +/-    1.19  0.120 / 0.200
G21     154.6          15.6                6.5 +/-    1.04      15.9 +/-    1.04  0.220 / 0.180
G24     39.8           10.3                3.5 +/-    3.62       9.7 +/-    3.62  0.220 / 0.310
G27     231.6          15.9                6.5 +/-    1.79      15.7 +/-    1.79  0.150 / 0.480
G31     176.9          31.7                9.4 +/-    1.57      15.9 +/-    1.57  0.100 / 0.180
G32     343.9          73.9                6.4 +/-    0.56       6.7 +/-    0.56  0.080 / 0.310