PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-19:57:50
G01     228.4          19.0               11.3 +/-    1.51      25.5 +/-    1.51  0.030 / 0.030
G03     290.3          67.6                8.5 +/-    1.04       9.1 +/-    1.04  0.030 / 0.040
G14     83.9           26.6                9.9 +/-    1.88      18.7 +/-    1.88  0.070 / 0.100
G16     150.9          41.7               14.7 +/-    0.99      20.9 +/-    0.99  0.050 / 0.110
G22     221.8          72.6               11.7 +/-    1.07      12.2 +/-    1.07  0.050 / 0.080
G23     305.6          35.9                8.3 +/-    1.05      12.9 +/-    1.05  0.040 / 0.080
G26     102.8          53.7               10.5 +/-    0.61      12.7 +/-    0.61  0.050 / 0.070
G31     44.1           34.7                7.7 +/-    1.36      12.3 +/-    1.36  0.040 / 0.080