PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-19:58:00
G01     312.9          27.9                6.8 +/-    1.60      12.5 +/-    1.60  0.130 / 0.180
G10     97.1           46.0                9.0 +/-    0.84      11.9 +/-    0.84  0.090 / 0.230
G11     291.2          27.2                6.9 +/-    2.26      12.7 +/-    2.26  0.030 / 0.040
G14     337.6          69.8                6.8 +/-    0.49       7.2 +/-    0.49  0.030 / 0.040
G18     112.4          18.5                9.6 +/-    1.31      22.0 +/-    1.31  0.190 / 0.320
G22     306.4          19.3                7.4 +/-    1.77      16.6 +/-    1.77  0.110 / 0.240
G25     89.4           14.0               11.0 +/-    2.36      28.0 +/-    2.36  0.030 / 0.030
G31     174.2          55.0                9.9 +/-    0.67      11.8 +/-    0.67  0.060 / 0.020
G32     25.9           58.7                6.5 +/-    0.62       7.4 +/-    0.62  0.030 / 0.040