PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-18:58:10
G02     28.1           59.7               16.9 +/-    0.67      19.2 +/-    0.67  0.020 / 0.050
G05     153.8          56.7               19.9 +/-    0.91      23.3 +/-    0.91  0.020 / 0.040
G06     52.3           18.5               14.6 +/-    1.46      33.3 +/-    1.46  0.030 / 0.050
G12     203.6          70.8               16.0 +/-    0.85      16.9 +/-    0.85  0.030 / 0.050
G19     98.6           10.0               15.7 +/-    2.35      43.7 +/-    2.35  0.050 / 0.120
G20     197.6          24.1               20.1 +/-    1.80      40.2 +/-    1.80  0.060 / 0.120
G25     297.4          55.0               18.0 +/-    0.95      21.5 +/-    0.95  0.030 / 0.050
G29     306.5          28.2               14.7 +/-    1.08      26.8 +/-    1.08  0.030 / 0.060