PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-17:57:30
G02     55.0           36.7               20.2 +/-    1.27      31.0 +/-    1.27  0.050 / 0.040
G05     74.7           68.9               20.2 +/-    0.69      21.4 +/-    0.69  0.090 / 0.080
G12     186.8          38.8               25.4 +/-    2.01      37.7 +/-    2.01  0.050 / 0.070
G13     134.0          11.3               30.2 +/-    5.30      81.8 +/-    5.30  0.050 / 0.070
G20     204.9          54.1               26.6 +/-    0.69      32.1 +/-    0.69  0.110 / 0.440
G21     267.2          15.3               15.8 +/-    2.97      39.0 +/-    2.97  0.140 / 0.360
G25     240.9          55.1               23.0 +/-    2.03      27.4 +/-    2.03  0.060 / 0.040
G29     328.0          53.5               15.7 +/-    1.16      19.0 +/-    1.16  0.060 / 0.050