PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-20:12:50
G02     80.8           16.2               11.8 +/-    1.35      28.5 +/-    1.35  0.130 / 0.160
G05     44.4           40.4               11.7 +/-    0.85      17.0 +/-    0.85  0.120 / 0.150
G13     105.0          32.1               13.9 +/-    1.39      23.3 +/-    1.39  0.100 / 0.410
G15     147.9          34.6               15.7 +/-    1.50      25.1 +/-    1.50  0.090 / 0.280
G18     229.2          24.3               13.8 +/-    1.28      27.5 +/-    1.28  0.040 / 0.030
G20     317.0          85.8               12.8 +/-    0.58      12.8 +/-    0.58  0.030 / 0.030
G21     294.2          34.6               11.6 +/-    2.14      18.5 +/-    2.14  0.050 / 0.060
G25     208.0          27.0               14.5 +/-    1.21      27.2 +/-    1.21  0.060 / 0.060
G26     311.3          15.3                9.5 +/-    1.72      23.5 +/-    1.72  0.100 / 0.110
G29     28.8           85.0               13.4 +/-    0.30      13.4 +/-    0.30  0.100 / 0.110