PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-16:43:10
G02     72.9           21.6                9.2 +/-    0.68      19.5 +/-    0.68  0.030 / 0.050
G05     46.3           48.6                9.6 +/-    1.20      12.3 +/-    1.20  0.030 / 0.060
G12     182.5          17.2               10.2 +/-    2.43      24.0 +/-    2.43  0.130 / 0.210
G13     116.1          25.8               13.4 +/-    1.38      25.7 +/-    1.38  0.080 / 0.170
G15     154.1          25.5               14.4 +/-    1.45      27.8 +/-    1.45  0.070 / 0.160
G18     223.5          15.7               12.8 +/-    2.66      31.3 +/-    2.66  0.080 / 0.170
G20     224.8          76.8               12.1 +/-    0.79      12.4 +/-    0.79  0.060 / 0.100
G21     285.6          29.5               10.1 +/-    1.46      17.9 +/-    1.46  0.070 / 0.110
G25     217.1          37.9               13.7 +/-    0.92      20.7 +/-    0.92  0.030 / 0.030
G29     353.5          76.3               10.8 +/-    0.57      11.1 +/-    0.57  0.020 / 0.030