PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-16:57:40
G07     329.8          56.7               11.6 +/-    0.68      13.6 +/-    0.68  0.040 / 0.050
G08     106.6          51.9               12.5 +/-    0.43      15.4 +/-    0.43  0.040 / 0.040
G09     195.4          75.5               13.3 +/-    0.35      13.7 +/-    0.35  0.030 / 0.050
G11     147.8          11.8               15.0 +/-    2.64      40.1 +/-    2.64  0.030 / 0.050
G23     153.3          38.4               13.6 +/-    0.72      20.3 +/-    0.72  0.050 / 0.090
G27     56.3           32.2                9.0 +/-    1.21      15.0 +/-    1.21  0.050 / 0.070
G28     236.2          28.5               14.9 +/-    1.90      26.9 +/-    1.90  0.080 / 0.200
G30     301.3          34.9               10.5 +/-    1.56      16.7 +/-    1.56  0.060 / 0.170