PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-19:12:30
G10     250.5          25.8               23.2 +/-    2.29      44.5 +/-    2.29  0.060 / 0.140
G13     54.7           31.3               20.0 +/-    0.46      34.1 +/-    0.46  0.080 / 0.130
G15     85.7           57.0               21.6 +/-    0.73      25.2 +/-    0.73  0.040 / 0.060
G16     300.7          13.5               19.2 +/-    1.42      49.6 +/-    1.42  0.050 / 0.080
G18     269.8          56.7               22.5 +/-    0.95      26.4 +/-    0.95  0.040 / 0.060
G20     42.2           49.2               20.0 +/-    0.66      25.5 +/-    0.66  0.040 / 0.060
G21     337.3          62.1               21.7 +/-    0.54      24.3 +/-    0.54  0.110 / 0.430
G29     162.1          44.2               24.6 +/-    1.08      33.6 +/-    1.08  0.120 / 0.410