PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/29-21:58:00
G01     227.9          18.5               10.9 +/-    2.53      24.8 +/-    2.53  0.050 / 0.100
G03     291.1          66.8                8.7 +/-    0.72       9.4 +/-    0.72  0.050 / 0.080
G14     84.9           25.6                8.2 +/-    1.65      15.9 +/-    1.65  0.030 / 0.030
G16     152.1          41.6               11.4 +/-    0.52      16.2 +/-    0.52  0.030 / 0.030
G22     223.1          72.4                9.7 +/-    0.47      10.2 +/-    0.47  0.080 / 0.080
G23     305.6          35.5                8.9 +/-    1.74      14.0 +/-    1.74  0.050 / 0.070
G26     103.7          54.1                9.5 +/-    0.59      11.4 +/-    0.59  0.040 / 0.090
G31     44.0           35.3                8.2 +/-    1.20      13.0 +/-    1.20  0.040 / 0.060