PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-03:12:50
G02     55.6           35.6                6.2 +/-    0.81       9.7 +/-    0.81  0.090 / 0.060
G05     66.6           64.2                7.6 +/-    0.45       8.3 +/-    0.45  0.130 / 0.100
G12     186.2          39.1               10.9 +/-    1.99      16.1 +/-    1.99  0.040 / 0.020
G13     133.0          11.2                7.7 +/-   18.14      20.9 +/-   18.14  0.040 / 0.020
G20     215.0          18.1               14.3 +/-    1.87      32.9 +/-    1.87  0.120 / 0.390
G21     266.5          13.5               13.9 +/-    2.04      35.8 +/-    2.04  0.100 / 0.470
G25     248.3          55.4               12.0 +/-    1.27      14.2 +/-    1.27  0.050 / 0.030
G29     324.1          48.5                9.1 +/-    1.54      11.7 +/-    1.54  0.050 / 0.030