PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-21:43:10
G02     77.8           19.2                9.7 +/-    2.42      21.9 +/-    2.42  0.090 / 0.320
G05     44.7           43.5               10.8 +/-    0.89      14.8 +/-    0.89  0.120 / 0.310
G13     108.4          30.5               15.8 +/-    0.66      27.4 +/-    0.66  0.110 / 0.130
G15     151.1          31.3               14.6 +/-    0.95      24.8 +/-    0.95  0.180 / 0.130
G18     227.3          20.9               16.2 +/-    3.05      34.9 +/-    3.05  0.120 / 0.160
G20     273.9          86.0                8.9 +/-    0.50       8.9 +/-    0.50  0.110 / 0.160
G21     291.0          32.1               10.8 +/-    1.81      18.1 +/-    1.81  0.030 / 0.050
G25     208.8          29.3               14.3 +/-    0.98      25.3 +/-    0.98  0.100 / 0.100
G26     313.2          14.6               -8.0 +/-   32.92     -20.1 +/-   32.92  0.020 / 0.020
G29     359.6          81.5               10.0 +/-    0.73      10.1 +/-    0.73  0.040 / 0.030