PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-16:28:00
G05     48.9           17.6                7.9 +/-    1.39      18.6 +/-    1.39  0.060 / 0.140
G10     236.6          12.1               10.7 +/-    3.09      28.5 +/-    3.09  0.070 / 0.130
G13     76.5           37.2               10.0 +/-    0.65      15.2 +/-    0.65  0.040 / 0.060
G15     121.3          52.6               13.2 +/-    0.71      16.1 +/-    0.71  0.040 / 0.050
G18     246.6          44.0               12.7 +/-    1.07      17.3 +/-    1.07  0.040 / 0.070
G20     25.6           67.5                9.5 +/-    0.92      10.2 +/-    0.92  0.060 / 0.050
G21     317.1          50.6                8.8 +/-    0.92      11.0 +/-    0.92  0.110 / 0.210
G26     290.5          19.2                9.0 +/-    1.15      20.1 +/-    1.15  0.140 / 0.300
G29     152.7          65.6               12.4 +/-    0.62      13.5 +/-    0.62  0.040 / 0.090