PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-22:28:10
G01     220.7          11.4                8.4 +/-    1.35      22.9 +/-    1.35  0.050 / 0.040
G03     261.2          70.2                8.0 +/-    0.92       8.4 +/-    0.92  0.070 / 0.040
G09     298.8          12.2                7.5 +/-   13.04      20.0 +/-   13.04  0.040 / 0.050
G14     93.7           19.2                8.1 +/-    1.62      18.3 +/-    1.62  0.040 / 0.060
G16     143.3          51.7               12.2 +/-    0.37      15.0 +/-    0.37  0.100 / 0.180
G22     202.8          63.6                8.3 +/-    0.30       9.2 +/-    0.30  0.060 / 0.130
G23     313.2          42.9                7.8 +/-    1.15      10.9 +/-    1.15  0.340 / 0.320
G26     84.2           55.0                8.5 +/-    0.68      10.1 +/-    0.68  0.250 / 0.400
G31     48.1           26.7                6.4 +/-    2.40      12.1 +/-    2.40  0.110 / 0.250