PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-20:43:10
G01     221.6          12.2               11.0 +/-    2.86      29.3 +/-    2.86  0.050 / 0.040
G03     261.9          70.7               10.8 +/-    0.76      11.3 +/-    0.76  0.050 / 0.040
G09     297.9          11.1               -2.7 +/-   36.15      -7.3 +/-   36.15  0.130 / 0.330
G14     92.5           20.5               10.4 +/-    1.72      22.6 +/-    1.72  0.120 / 0.420
G16     142.7          51.1               12.7 +/-    0.68      15.8 +/-    0.68  0.080 / 0.120
G22     202.9          64.4               10.8 +/-    0.94      11.9 +/-    0.94  0.100 / 0.110
G23     312.8          42.6               10.3 +/-    1.16      14.4 +/-    1.16  0.050 / 0.060
G26     84.9           54.6                8.8 +/-    0.75      10.5 +/-    0.75  0.040 / 0.070
G31     47.9           26.8                8.3 +/-    1.40      15.5 +/-    1.40  0.100 / 0.220