PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-01:57:40
G02     43.2           46.1                9.4 +/-    0.52      12.5 +/-    0.52  0.050 / 0.050
G05     108.4          68.6               10.7 +/-    0.71      11.5 +/-    0.71  0.050 / 0.050
G12     193.5          57.9               13.1 +/-    0.93      15.1 +/-    0.93  0.030 / 0.060
G25     275.8          58.6               11.5 +/-    0.65      13.2 +/-    0.65  0.030 / 0.050
G29     317.2          40.1               11.0 +/-    0.98      16.0 +/-    0.98  0.040 / 0.040