PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/29-22:42:30
G03     231.3          66.6               10.3 +/-    0.59      11.1 +/-    0.59  0.050 / 0.060
G09     304.6          19.3                8.3 +/-    2.13      18.6 +/-    2.13  0.040 / 0.050
G14     101.8          12.9                8.5 +/-    3.21      22.2 +/-    3.21  0.060 / 0.040
G16     128.6          60.4               12.2 +/-    0.48      13.8 +/-    0.48  0.040 / 0.050
G22     193.9          53.4               10.9 +/-    0.47      13.2 +/-    0.47  0.280 / 0.270
G23     320.9          50.6                9.5 +/-    0.86      11.9 +/-    0.86  0.370 / 0.170
G26     67.0           51.6                8.2 +/-    0.96      10.1 +/-    0.96  0.030 / 0.030
G31     53.0           19.0                6.3 +/-    2.58      14.2 +/-    2.58  0.030 / 0.040