PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-22:12:40
G01     237.2          26.6                7.4 +/-    2.19      14.0 +/-    2.19  0.030 / 0.040
G03     309.0          57.0                5.6 +/-    2.01       6.6 +/-    2.01  0.030 / 0.040
G14     74.2           32.4                6.9 +/-    0.71      11.5 +/-    0.71  0.090 / 0.170
G16     159.4          29.5               11.7 +/-    1.36      20.7 +/-    1.36  0.080 / 0.170
G22     270.3          75.0                8.9 +/-    0.48       9.1 +/-    0.48  0.040 / 0.060
G23     296.8          27.5                4.8 +/-    2.05       8.9 +/-    2.05  0.040 / 0.060
G26     123.2          48.2                9.5 +/-    0.83      12.3 +/-    0.83  0.100 / 0.150
G31     40.5           46.4                5.7 +/-    0.56       7.5 +/-    0.56  0.080 / 0.160
G32     88.5           15.0                7.5 +/-    1.49      18.6 +/-    1.49  0.070 / 0.210