PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-19:27:50
G02     67.9           26.4               21.7 +/-    1.57      41.1 +/-    1.57  0.060 / 0.040
G05     49.7           56.2               24.6 +/-    0.91      28.9 +/-    0.91  0.050 / 0.040
G12     183.1          21.6               33.0 +/-    2.06      69.9 +/-    2.06  0.060 / 0.070
G13     121.2          22.3               31.0 +/-    1.09      64.4 +/-    1.09  0.060 / 0.070
G15     158.2          20.4               37.2 +/-    1.44      81.1 +/-    1.44  0.090 / 0.200
G20     215.8          72.6               28.0 +/-    0.50      29.2 +/-    0.50  0.120 / 0.170
G21     280.2          24.8               26.3 +/-    1.28      51.6 +/-    1.28  0.030 / 0.030
G25     219.6          42.0               30.0 +/-    1.76      42.2 +/-    1.76  0.030 / 0.040
G29     340.6          68.9               25.8 +/-    1.01      27.4 +/-    1.01  0.030 / 0.030