Wind speed confidence level ratio

Hello to all,

I’m currently using the Wind Extraction tool on ENVISAT ASAR Wide Swath products and I explored the quality flags of the generated products.
It seems that a high ratio indicates a low confidence of generated wind speed products.
We have run the algorithm over several images (> 100) and all of them seem to have low confidence level (>0.90) : is it normal ?

Many thanks in advance for your answer,

Kind regards,

Caroline Quod