PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/25-16:57:50
G02     74.9           20.0               11.0 +/-    1.29      24.2 +/-    1.29  0.090 / 0.150
G05     45.6           46.2               12.1 +/-    0.66      16.0 +/-    0.66  0.100 / 0.150
G12     181.9          14.8               16.9 +/-    1.20      42.3 +/-    1.20  0.030 / 0.060
G13     113.6          27.4               14.8 +/-    0.92      27.5 +/-    0.92  0.030 / 0.040
G15     152.5          27.8               18.3 +/-    0.83      33.7 +/-    0.83  0.040 / 0.040
G18     224.7          17.9               15.0 +/-    2.31      34.7 +/-    2.31  0.040 / 0.050
G20     231.2          79.5               15.4 +/-    0.67      15.6 +/-    0.67  0.130 / 0.320
G21     287.8          31.0               13.6 +/-    0.81      23.4 +/-    0.81  0.180 / 0.340
G25     215.1          35.5               16.1 +/-    2.42      25.4 +/-    2.42  0.090 / 0.210
G29     359.4          78.7               11.9 +/-    0.58      12.2 +/-    0.58  0.090 / 0.220