PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-20:58:10
G10     253.5          28.2               18.8 +/-    2.02      34.2 +/-    2.02  0.080 / 0.160
G13     51.7           29.4               12.4 +/-    1.23      22.0 +/-    1.23  0.080 / 0.140
G15     79.9           56.5               14.8 +/-    0.94      17.4 +/-    0.94  0.140 / 0.350
G16     296.1          13.8               12.9 +/-    2.52      33.0 +/-    2.52  0.130 / 0.440
G18     274.8          58.2               15.6 +/-    1.75      18.0 +/-    1.75  0.030 / 0.040
G20     45.1           45.6               19.2 +/-    0.58      25.6 +/-    0.58  0.030 / 0.050
G21     340.5          63.8               15.4 +/-    0.56      17.0 +/-    0.56  0.050 / 0.060
G26     268.6          14.0               20.4 +/-    1.94      52.0 +/-    1.94  0.040 / 0.060
G29     163.7          41.6               22.3 +/-    0.66      31.6 +/-    0.66  0.030 / 0.050