PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-22:28:00
G05     52.6           9.4                 7.3 +/-    4.04      20.5 +/-    4.04  0.130 / 0.330
G10     243.0          19.9               15.0 +/-    2.36      33.0 +/-    2.36  0.200 / 0.340
G13     63.3           34.1               10.1 +/-    0.98      16.3 +/-    0.98  0.070 / 0.060
G15     112.7          57.5               12.4 +/-    0.77      14.4 +/-    0.77  0.050 / 0.050
G16     303.5          15.7                8.1 +/-    1.77      19.8 +/-    1.77  0.090 / 0.320
G20     247.9          15.7                7.4 +/-    3.36      18.0 +/-    3.36  0.100 / 0.400
G21     321.8          52.8               11.2 +/-    0.58      13.7 +/-    0.58  0.040 / 0.030
G26     275.5          19.0               11.5 +/-    0.82      26.0 +/-    0.82  0.030 / 0.030
G29     162.0          62.2               12.2 +/-    0.75      13.6 +/-    0.75  0.070 / 0.110