PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-20:12:30
G02     57.1           35.5               18.8 +/-    0.61      29.5 +/-    0.61  0.190 / 0.480
G05     68.0           67.8               20.7 +/-    0.65      22.2 +/-    0.65  0.160 / 0.470
G12     185.4          34.3               23.1 +/-    1.28      37.1 +/-    1.28  0.070 / 0.100
G13     131.4          13.8               25.2 +/-    1.95      64.7 +/-    1.95  0.040 / 0.090
G15     165.6          9.9                -9.9 +/-   18.93     -27.7 +/-   18.93  0.030 / 0.060
G20     206.0          58.9               22.2 +/-    0.93      25.4 +/-    0.93  0.050 / 0.060
G21     269.6          16.7               22.1 +/-    2.36      52.8 +/-    2.36  0.030 / 0.060
G25     232.8          52.4               21.0 +/-    1.58      25.8 +/-    1.58  0.030 / 0.050
G29     329.3          55.6               18.7 +/-    0.68      22.2 +/-    0.68  0.030 / 0.030