PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-14:57:50
G02     202.9          30.5               16.1 +/-    1.48      27.8 +/-    1.48  0.030 / 0.030
G03     61.5           9.7                11.5 +/-    1.29      32.1 +/-    1.29  0.030 / 0.030
G06     164.3          66.1               12.9 +/-    0.42      14.0 +/-    0.42  0.130 / 0.250
G12     306.5          13.5                9.2 +/-    1.92      23.8 +/-    1.92  0.100 / 0.250
G17     36.5           48.9               10.3 +/-    1.73      13.1 +/-    1.73  0.070 / 0.100
G19     1.4            65.7               11.0 +/-    0.61      11.9 +/-    0.61  0.070 / 0.090
G24     302.2          35.6               11.2 +/-    1.14      17.6 +/-    1.14  0.210 / 0.270
G28     100.6          32.3                9.9 +/-    1.98      16.6 +/-    1.98  0.120 / 0.240