PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-17:12:40
G01     319.8          15.7                5.1 +/-    1.86      12.5 +/-    1.86  0.210 / 0.310
G08     261.0          14.4                7.4 +/-    2.20      18.8 +/-    2.20  0.210 / 0.330
G10     75.0           55.1                5.3 +/-    0.62       6.4 +/-    0.62  0.040 / 0.070
G11     306.7          20.6                7.1 +/-    2.94      15.4 +/-    2.94  0.040 / 0.080
G14     287.4          69.5                5.7 +/-    0.44       6.0 +/-    0.44  0.220 / 0.440
G18     100.5          28.8                5.6 +/-    0.49      10.1 +/-    0.49  0.160 / 0.300
G27     224.9          10.0                9.9 +/-    2.72      27.6 +/-    2.72  0.040 / 0.050
G31     177.0          38.8                9.8 +/-    1.53      14.5 +/-    1.53  0.040 / 0.050
G32     1.9            69.2                6.5 +/-    0.99       6.9 +/-    0.99  0.030 / 0.030