PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/03-20:58:00
G02     83.5           14.3               17.2 +/-    2.28      43.5 +/-    2.28  0.170 / 0.260
G05     44.4           37.9               16.3 +/-    0.69      24.5 +/-    0.69  0.130 / 0.190
G13     100.8          33.8               20.7 +/-    0.85      33.6 +/-    0.85  0.160 / 0.260
G15     145.4          37.7               23.6 +/-    1.07      35.7 +/-    1.07  0.170 / 0.250
G18     231.4          27.2               27.6 +/-    2.01      51.4 +/-    2.01  0.050 / 0.110
G20     354.9          83.3               20.0 +/-    0.50      20.1 +/-    0.50  0.140 / 0.080
G21     297.2          36.6               21.2 +/-    0.95      32.6 +/-    0.95  0.040 / 0.050
G25     205.6          23.5               28.1 +/-    2.45      56.9 +/-    2.45  0.040 / 0.060
G26     307.8          16.9               17.4 +/-    2.43      41.5 +/-    2.43  0.040 / 0.030
G29     77.4           86.2               21.3 +/-    0.25      21.3 +/-    0.25  0.040 / 0.040