PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-17:27:50
G10     257.6          31.4               12.0 +/-    1.23      20.5 +/-    1.23  0.090 / 0.230
G13     48.0           26.2               10.6 +/-    1.60      20.1 +/-    1.60  0.100 / 0.210
G15     70.4           53.7               12.3 +/-    0.51      14.8 +/-    0.51  0.040 / 0.030
G16     293.5          12.8                8.1 +/-    1.27      21.3 +/-    1.27  0.040 / 0.030
G18     284.4          61.6               11.0 +/-    1.21      12.3 +/-    1.21  0.260 / 0.390
G20     47.1           43.6               10.8 +/-    1.00      14.9 +/-    1.00  0.250 / 0.420
G21     353.4          68.2               11.2 +/-    0.58      12.0 +/-    0.58  0.060 / 0.050
G26     264.2          12.1               11.3 +/-    1.25      30.1 +/-    1.25  0.070 / 0.050
G27     321.3          12.7                7.8 +/-    3.84      20.4 +/-    3.84  0.120 / 0.170
G29     164.1          35.6               14.7 +/-    1.53      23.0 +/-    1.53  0.130 / 0.150