PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-18:57:30
G01     313.7          26.9                9.8 +/-    0.87      18.4 +/-    0.87  0.110 / 0.160
G10     95.6           46.8               10.0 +/-    0.49      13.2 +/-    0.49  0.140 / 0.200
G11     292.9          26.6                8.0 +/-    1.96      15.1 +/-    1.96  0.060 / 0.040
G14     333.0          70.2                9.8 +/-    0.46      10.3 +/-    0.46  0.050 / 0.040
G18     111.6          19.2               11.6 +/-    1.25      26.1 +/-    1.25  0.140 / 0.290
G22     306.0          18.6                9.7 +/-    1.28      22.1 +/-    1.28  0.140 / 0.230
G25     90.9           13.5               12.3 +/-    2.17      31.8 +/-    2.17  0.040 / 0.030
G31     173.9          54.1               11.9 +/-    0.62      14.4 +/-    0.62  0.030 / 0.040
G32     24.9           59.3                9.5 +/-    0.68      10.8 +/-    0.68  0.040 / 0.050