PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-17:57:40
G07     328.9          56.3               11.8 +/-    0.42      13.9 +/-    0.42  0.040 / 0.040
G08     109.0          51.7               13.6 +/-    0.32      16.8 +/-    0.32  0.040 / 0.040
G09     197.9          76.4               11.9 +/-    0.34      12.2 +/-    0.34  0.070 / 0.080
G11     148.5          11.3               16.4 +/-    6.58      44.5 +/-    6.58  0.040 / 0.090
G23     153.2          39.4               13.8 +/-    0.84      20.2 +/-    0.84  0.040 / 0.050
G27     56.8           32.5               10.6 +/-    0.90      17.6 +/-    0.90  0.030 / 0.050
G28     235.8          28.1               12.6 +/-    1.95      23.0 +/-    1.95  0.080 / 0.090
G30     301.1          35.0               11.1 +/-    2.14      17.6 +/-    2.14  0.090 / 0.080