PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-17:27:40
G10     261.1          33.8               11.0 +/-    1.32      17.9 +/-    1.32  0.160 / 0.380
G13     45.5           23.7                8.0 +/-    1.23      16.2 +/-    1.23  0.140 / 0.270
G15     65.0           51.5               10.3 +/-    0.37      12.8 +/-    0.37  0.040 / 0.050
G16     289.9          12.3               11.7 +/-    2.22      31.0 +/-    2.22  0.040 / 0.040
G18     291.7          63.3                9.5 +/-    0.73      10.4 +/-    0.73  0.100 / 0.480
G20     49.7           40.7                9.2 +/-    0.76      13.2 +/-    0.76  0.090 / 0.510
G21     1.6            70.5               11.6 +/-    0.72      12.3 +/-    0.72  0.040 / 0.070
G26     260.8          10.4                9.6 +/-    2.62      26.6 +/-    2.62  0.040 / 0.070
G27     320.2          15.7                8.5 +/-    1.74      20.7 +/-    1.74  0.230 / 0.470
G29     164.9          31.8               14.9 +/-    0.63      25.1 +/-    0.63  0.200 / 0.630