PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-23:12:30
G03     230.6          66.2                6.3 +/-    0.93       6.8 +/-    0.93  0.040 / 0.050
G09     305.0          19.9                3.9 +/-    1.45       8.5 +/-    1.45  0.040 / 0.050
G14     102.3          12.4                7.0 +/-    1.57      18.5 +/-    1.57  0.240 / 0.240
G16     128.2          60.8                8.4 +/-    0.55       9.5 +/-    0.55  0.180 / 0.270
G22     193.7          52.8                7.9 +/-    0.63       9.6 +/-    0.63  0.030 / 0.030
G23     321.2          51.0                5.6 +/-    0.98       6.9 +/-    0.98  0.030 / 0.030
G26     66.5           51.5                4.9 +/-    1.32       6.1 +/-    1.32  0.160 / 0.290
G31     53.3           18.8                3.5 +/-    3.74       7.9 +/-    3.74  0.130 / 0.270