PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-22:12:30
G02     214.5          58.9               14.8 +/-    0.92      17.0 +/-    0.92  0.100 / 0.220
G06     68.4           78.1               13.3 +/-    0.57      13.6 +/-    0.57  0.150 / 0.240
G12     316.8          31.7               11.9 +/-    0.95      20.1 +/-    0.95  0.040 / 0.050
G17     55.6           33.3               11.4 +/-    0.41      18.6 +/-    0.41  0.040 / 0.050
G19     37.3           50.0               12.7 +/-    0.78      16.0 +/-    0.78  0.030 / 0.020
G24     266.7          42.0               14.1 +/-    1.38      19.8 +/-    1.38  0.030 / 0.030
G28     119.9          19.2               16.7 +/-    1.19      37.5 +/-    1.19  0.070 / 0.090