PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-17:12:50
G02     61.2           31.3               13.0 +/-    1.39      22.1 +/-    1.39  0.060 / 0.100
G05     58.5           62.9               13.8 +/-    0.49      15.4 +/-    0.49  0.060 / 0.120
G12     185.5          31.4               16.6 +/-    0.97      28.4 +/-    0.97  0.030 / 0.040
G13     128.5          16.2               21.3 +/-    1.45      51.4 +/-    1.45  0.030 / 0.040
G15     162.5          13.4               20.9 +/-    1.69      53.9 +/-    1.69  0.050 / 0.060
G20     208.9          61.6               17.0 +/-    0.32      19.1 +/-    0.32  0.040 / 0.060
G21     273.3          20.3               11.8 +/-    1.62      25.8 +/-    1.62  0.050 / 0.100
G25     231.0          50.1               15.4 +/-    0.93      19.5 +/-    0.93  0.050 / 0.110