PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-01:12:50
G02     39.9           49.5               10.0 +/-    1.38      12.7 +/-    1.38  0.030 / 0.040
G05     120.2          67.1               11.2 +/-    0.45      12.0 +/-    0.45  0.030 / 0.040
G06     58.0           10.2                9.8 +/-    2.86      27.3 +/-    2.86  0.030 / 0.030
G12     191.9          59.7               12.5 +/-    0.45      14.3 +/-    0.45  0.020 / 0.030
G25     286.2          56.5                8.7 +/-    1.80      10.2 +/-    1.80  0.030 / 0.050
G29     311.7          32.4                9.3 +/-    1.92      15.5 +/-    1.92  0.030 / 0.040