PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-22:27:40
G02     203.9          38.6               17.5 +/-    1.11      26.0 +/-    1.11  0.100 / 0.160
G06     152.1          72.7               12.2 +/-    0.97      12.7 +/-    0.97  0.090 / 0.170
G12     309.4          18.0               10.0 +/-    0.98      23.1 +/-    0.98  0.050 / 0.100
G17     35.6           49.9               11.3 +/-    0.70      14.3 +/-    0.70  0.060 / 0.090
G19     4.7            64.0               10.7 +/-    0.34      11.8 +/-    0.34  0.060 / 0.160
G24     294.3          39.6               10.5 +/-    0.73      15.4 +/-    0.73  0.060 / 0.180
G28     105.6          28.9               13.8 +/-    0.58      24.8 +/-    0.58  0.040 / 0.040