PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-17:43:10
G02     204.5          35.4               13.5 +/-    1.48      21.3 +/-    1.48  0.060 / 0.120
G06     149.8          72.5               11.5 +/-    0.64      12.0 +/-    0.64  0.070 / 0.110
G12     309.8          20.0               10.6 +/-    1.54      23.3 +/-    1.54  0.050 / 0.080
G17     38.0           47.6               10.9 +/-    0.34      14.2 +/-    0.34  0.060 / 0.080
G19     359.2          65.2               11.3 +/-    1.43      12.3 +/-    1.43  0.110 / 0.200
G24     294.2          40.0               10.7 +/-    1.07      15.5 +/-    1.07  0.120 / 0.240
G28     104.6          29.7               11.8 +/-    0.82      20.8 +/-    0.82  0.030 / 0.050