PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-17:27:50
G08     310.0          18.6                9.2 +/-    0.86      20.9 +/-    0.86  0.060 / 0.070
G10     330.2          59.6               10.7 +/-    0.42      12.2 +/-    0.42  0.070 / 0.080
G14     218.1          30.7               17.3 +/-    3.87      29.8 +/-    3.87  0.050 / 0.050
G15     46.8           9.7                 7.5 +/-    3.47      21.0 +/-    3.47  0.050 / 0.070
G18     41.2           58.4               11.2 +/-    0.85      12.9 +/-    0.85  0.110 / 0.260
G21     133.9          51.6               15.4 +/-    1.02      19.0 +/-    1.02  0.130 / 0.140
G24     75.6           30.5               10.7 +/-    0.78      18.6 +/-    0.78  0.120 / 0.090
G27     273.6          37.6               13.3 +/-    1.77      20.2 +/-    1.77  0.080 / 0.080
G32     223.3          51.1               16.1 +/-    1.74      20.0 +/-    1.74  0.040 / 0.030