PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/05-17:28:00
G07     345.6          62.2               18.1 +/-    0.70      20.2 +/-    0.70  0.050 / 0.130
G08     88.8           54.0               19.8 +/-    0.61      23.8 +/-    0.61  0.050 / 0.140
G09     184.5          64.8               19.1 +/-    1.50      20.9 +/-    1.50  0.030 / 0.040
G11     141.3          18.2               17.7 +/-    1.79      40.6 +/-    1.79  0.040 / 0.040
G23     156.2          28.0               18.9 +/-    1.85      34.6 +/-    1.85  0.030 / 0.050
G27     47.7           26.4               15.6 +/-    1.21      29.6 +/-    1.21  0.040 / 0.050
G28     244.8          36.3               21.5 +/-    1.89      33.3 +/-    1.89  0.070 / 0.140
G30     309.6          41.8               18.1 +/-    1.31      25.6 +/-    1.31  0.070 / 0.130