PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-01:43:00
G02     50.9           39.8                8.8 +/-    1.60      12.9 +/-    1.60  0.050 / 0.050
G05     79.8           67.5               10.4 +/-    0.46      11.1 +/-    0.46  0.040 / 0.060
G12     186.8          44.6               12.3 +/-    0.61      16.6 +/-    0.61  0.020 / 0.030
G25     258.6          57.5               10.8 +/-    2.38      12.5 +/-    2.38  0.030 / 0.020
G29     320.4          43.3               11.0 +/-    1.15      15.2 +/-    1.15  0.040 / 0.040