PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-19:27:50
G01     92.6           31.3               15.3 +/-    0.85      26.0 +/-    0.85  0.360 / 0.220
G07     123.5          47.8               15.9 +/-    0.58      20.7 +/-    0.58  0.170 / 0.240
G08     42.3           11.6               11.0 +/-    2.35      29.6 +/-    2.35  0.070 / 0.120
G11     72.3           41.2               14.8 +/-    0.85      21.1 +/-    0.85  0.090 / 0.100
G13     297.1          35.2               15.0 +/-    3.09      23.8 +/-    3.09  0.030 / 0.060
G17     213.8          47.9               17.4 +/-    0.87      22.5 +/-    0.87  0.040 / 0.060
G18     66.3           24.4               14.1 +/-    1.11      28.0 +/-    1.11  0.070 / 0.150
G19     213.9          24.0               18.7 +/-    1.95      37.4 +/-    1.95  0.070 / 0.150
G28     345.7          61.8               14.5 +/-    0.78      16.2 +/-    0.78  0.040 / 0.050
G30     99.0           76.4               15.7 +/-    0.71      16.1 +/-    0.71  0.030 / 0.050