PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-21:43:00
G08     303.2          21.5               11.5 +/-    1.78      24.4 +/-    1.78  0.090 / 0.070
G10     341.9          61.3               11.8 +/-    0.49      13.3 +/-    0.49  0.060 / 0.100
G14     221.7          37.6               17.3 +/-    1.50      26.2 +/-    1.50  0.030 / 0.030
G18     48.8           56.3               12.8 +/-    0.47      15.0 +/-    0.47  0.020 / 0.030
G21     138.9          48.5               15.8 +/-    1.08      20.3 +/-    1.08  0.030 / 0.060
G24     68.7           30.0               13.7 +/-    0.90      24.0 +/-    0.90  0.040 / 0.060
G27     265.4          36.1               16.7 +/-    1.05      26.0 +/-    1.05  0.030 / 0.040
G32     229.1          54.9               16.2 +/-    1.27      19.4 +/-    1.27  0.040 / 0.040