PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-18:58:10
G05     52.9           10.3               10.9 +/-    1.00      30.2 +/-    1.00  0.120 / 0.340
G10     244.0          20.0               12.0 +/-    1.39      26.4 +/-    1.39  0.080 / 0.320
G13     63.2           35.0               11.2 +/-    0.73      17.7 +/-    0.73  0.050 / 0.070
G15     102.4          57.0               13.8 +/-    0.78      16.1 +/-    0.78  0.060 / 0.050
G16     308.3          12.7               11.6 +/-    2.06      30.5 +/-    2.06  0.050 / 0.070
G18     258.5          51.4               12.7 +/-    0.86      15.8 +/-    0.86  0.040 / 0.060
G20     36.3           56.4               12.5 +/-    0.68      14.7 +/-    0.68  0.100 / 0.220
G21     327.1          56.6               12.1 +/-    0.73      14.2 +/-    0.73  0.100 / 0.240
G26     281.1          17.4               10.4 +/-    0.67      24.4 +/-    0.67  0.050 / 0.120
G29     159.2          53.3               14.8 +/-    2.27      18.0 +/-    2.27  0.050 / 0.090