PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-22:42:50
G02     212.9          57.1               15.7 +/-    0.76      18.3 +/-    0.76  0.040 / 0.070
G06     68.2           76.7               14.3 +/-    0.63      14.7 +/-    0.63  0.050 / 0.070
G12     317.5          33.2               12.5 +/-    1.39      20.6 +/-    1.39  0.040 / 0.050
G17     52.3           37.4               12.0 +/-    0.84      18.2 +/-    0.84  0.040 / 0.050
G19     33.1           52.7               13.7 +/-    0.42      16.7 +/-    0.42  0.110 / 0.270
G24     270.2          42.3               14.8 +/-    1.37      20.8 +/-    1.37  0.090 / 0.260
G28     120.2          16.2               14.9 +/-    1.02      35.9 +/-    1.02  0.050 / 0.080