PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-23:57:40
G03     231.8          66.3                7.0 +/-    0.61       7.6 +/-    0.61  0.050 / 0.050
G09     305.0          20.0                7.1 +/-    1.34      15.5 +/-    1.34  0.050 / 0.050
G14     102.4          12.2                8.5 +/-    2.27      22.5 +/-    2.27  0.070 / 0.170
G16     129.6          60.7               10.6 +/-    0.99      12.0 +/-    0.99  0.080 / 0.130
G22     194.0          53.0                9.2 +/-    1.08      11.2 +/-    1.08  0.030 / 0.040
G23     321.0          50.7                6.2 +/-    1.16       7.8 +/-    1.16  0.040 / 0.050
G26     67.0           51.9                6.6 +/-    0.54       8.1 +/-    0.54  0.130 / 0.610
G31     53.1           19.2                4.4 +/-    0.60       9.8 +/-    0.60  0.110 / 0.520