PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/16-16:42:50
G02     56.4           35.2                7.6 +/-    0.48      11.9 +/-    0.48  0.020 / 0.040
G05     69.8           67.3                7.6 +/-    0.41       8.1 +/-    0.41  0.030 / 0.050
G12     186.9          37.9               10.7 +/-    1.13      16.2 +/-    1.13  0.050 / 0.080
G13     133.0          12.1               13.3 +/-    2.20      35.5 +/-    2.20  0.070 / 0.100
G20     205.8          54.8               11.0 +/-    0.94      13.2 +/-    0.94  0.050 / 0.060
G21     268.5          16.7               10.9 +/-    3.38      25.9 +/-    3.38  0.040 / 0.060
G25     240.2          54.4               11.4 +/-    1.19      13.7 +/-    1.19  0.160 / 0.530
G29     329.9          55.6                9.1 +/-    0.72      10.8 +/-    0.72  0.120 / 0.450