PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-18:28:00
G05     49.5           16.8               10.6 +/-    0.89      25.3 +/-    0.89  0.080 / 0.160
G10     238.2          13.8               13.9 +/-    4.06      35.6 +/-    4.06  0.100 / 0.210
G13     73.5           37.1               10.9 +/-    0.72      16.6 +/-    0.72  0.040 / 0.070
G15     118.2          53.9               13.6 +/-    0.80      16.4 +/-    0.80  0.040 / 0.080
G16     315.9          10.5               -0.4 +/-   22.52      -1.0 +/-   22.52  0.090 / 0.210
G18     248.8          45.3               12.8 +/-    0.83      17.2 +/-    0.83  0.080 / 0.220
G20     29.4           64.3               11.4 +/-    0.47      12.5 +/-    0.47  0.060 / 0.120
G21     318.1          51.1               12.5 +/-    0.97      15.5 +/-    0.97  0.060 / 0.110
G26     289.7          18.5               11.6 +/-    1.48      26.5 +/-    1.48  0.050 / 0.050
G29     154.5          62.6               14.5 +/-    1.27      16.1 +/-    1.27  0.040 / 0.050