PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-15:27:50
G02     33.3           55.7                9.5 +/-    0.58      11.3 +/-    0.58  0.030 / 0.040
G05     145.9          60.6               13.5 +/-    0.78      15.2 +/-    0.78  0.040 / 0.040
G06     53.0           18.3                7.7 +/-    1.21      17.7 +/-    1.21  0.030 / 0.040
G12     202.8          68.9                8.7 +/-    0.99       9.2 +/-    0.99  0.030 / 0.030
G20     198.6          25.4               11.6 +/-    1.02      22.4 +/-    1.02  0.100 / 0.220
G25     295.8          54.7               11.0 +/-    0.91      13.1 +/-    0.91  0.120 / 0.210
G29     309.8          32.4                7.6 +/-    1.07      12.7 +/-    1.07  0.050 / 0.050