PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-17:12:50
G01     119.2          17.0               13.0 +/-    1.97      30.8 +/-    1.97  0.040 / 0.070
G07     88.0           61.8               13.7 +/-    0.63      15.3 +/-    0.63  0.050 / 0.050
G08     45.3           32.3               10.8 +/-    1.10      18.1 +/-    1.10  0.030 / 0.040
G09     177.8          28.3               13.6 +/-    2.27      24.6 +/-    2.27  0.030 / 0.030
G11     106.6          40.3               14.2 +/-    1.02      20.5 +/-    1.02  0.080 / 0.230
G13     317.7          19.6               13.3 +/-    1.68      29.5 +/-    1.68  0.080 / 0.230
G17     200.9          23.3               11.6 +/-    1.67      23.5 +/-    1.67  0.040 / 0.080
G18     93.3           20.4               12.5 +/-    0.53      27.3 +/-    0.53  0.040 / 0.070
G28     284.1          53.7               12.8 +/-    1.01      15.5 +/-    1.01  0.080 / 0.220
G30     350.5          69.8               14.0 +/-    1.75      14.8 +/-    1.75  0.080 / 0.150