PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-21:27:50
G02     70.6           24.8               14.4 +/-    0.74      28.2 +/-    0.74  0.060 / 0.100
G05     47.1           52.1               14.2 +/-    0.75      17.5 +/-    0.75  0.060 / 0.120
G12     181.7          17.0               23.6 +/-    5.27      56.1 +/-    5.27  0.090 / 0.200
G13     117.3          25.2               18.3 +/-    1.24      35.7 +/-    1.24  0.070 / 0.160
G15     156.7          23.5               22.1 +/-    1.40      44.8 +/-    1.40  0.070 / 0.220
G18     223.0          13.2               31.2 +/-    1.84      81.2 +/-    1.84  0.060 / 0.140
G20     221.7          77.9               19.3 +/-    0.69      19.7 +/-    0.69  0.030 / 0.050
G21     283.4          26.7               20.4 +/-    2.48      38.4 +/-    2.48  0.030 / 0.050
G25     214.6          37.6               21.7 +/-    0.96      32.8 +/-    0.96  0.030 / 0.030
G29     342.8          72.2               21.3 +/-    0.67      22.3 +/-    0.67  0.030 / 0.030