PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-21:43:00
G02     83.3           14.8                9.4 +/-    2.25      23.6 +/-    2.25  0.080 / 0.190
G05     44.5           37.2                9.9 +/-    0.71      15.0 +/-    0.71  0.080 / 0.180
G13     100.6          33.8               13.7 +/-    1.42      22.2 +/-    1.42  0.100 / 0.200
G15     145.9          37.5               17.2 +/-    0.71      26.1 +/-    0.71  0.090 / 0.220
G18     231.4          26.9               18.3 +/-    1.69      34.3 +/-    1.69  0.050 / 0.080
G20     356.9          83.1               11.1 +/-    0.64      11.2 +/-    0.64  0.040 / 0.090
G21     297.0          36.3               13.1 +/-    0.86      20.3 +/-    0.86  0.030 / 0.030
G25     205.2          23.3               18.6 +/-    4.12      37.9 +/-    4.12  0.030 / 0.030
G26     307.5          17.1               10.9 +/-    1.07      25.7 +/-    1.07  0.060 / 0.110
G29     69.9           86.5               10.8 +/-    0.66      10.8 +/-    0.66  0.050 / 0.130