PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/01-17:57:50
G02     61.0           31.6               15.6 +/-    1.49      26.4 +/-    1.49  0.100 / 0.300
G05     59.1           63.5               16.6 +/-    0.52      18.4 +/-    0.52  0.140 / 0.300
G12     185.3          31.2               20.4 +/-    1.91      34.8 +/-    1.91  0.040 / 0.070
G13     128.5          16.2               22.3 +/-    2.06      53.8 +/-    2.06  0.050 / 0.060
G15     162.8          13.3               25.3 +/-    1.45      65.6 +/-    1.45  0.060 / 0.110
G20     208.7          62.0               21.9 +/-    0.37      24.4 +/-    0.37  0.070 / 0.080
G21     273.1          19.9               15.4 +/-    1.16      33.9 +/-    1.16  0.050 / 0.050
G25     230.3          50.0               19.9 +/-    1.24      25.1 +/-    1.24  0.040 / 0.050
G29     333.8          60.6               17.0 +/-    1.01      19.2 +/-    1.01  0.030 / 0.030