PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-19:42:50
G02     74.7           21.0               15.5 +/-    1.46      33.3 +/-    1.46  0.110 / 0.140
G05     45.6           47.9               15.9 +/-    0.49      20.6 +/-    0.49  0.130 / 0.170
G12     181.2          13.6               20.4 +/-    2.46      52.4 +/-    2.46  0.160 / 0.190
G13     113.4          27.8               17.9 +/-    1.14      32.9 +/-    1.14  0.120 / 0.220
G15     153.2          27.7               20.0 +/-    2.78      36.7 +/-    2.78  0.040 / 0.040
G18     225.0          17.6               22.1 +/-    4.40      51.7 +/-    4.40  0.050 / 0.040
G20     233.6          81.5               17.0 +/-    0.71      17.1 +/-    0.71  0.030 / 0.030
G21     287.4          29.9               17.5 +/-    2.29      30.6 +/-    2.29  0.020 / 0.020
G25     213.0          34.3               17.5 +/-    1.80      28.1 +/-    1.80  0.050 / 0.030
G29     352.5          77.7               17.0 +/-    0.42      17.4 +/-    0.42  0.040 / 0.040