When the direction of the airflow is known, choose a UNIdirectional probe.
If you are assuming... assuming that the flow was multidirectional.
Please show calculations.. diagrams of the flow in the anemometer traverse
based on the literature rather than generalised manuals..
perhaps you could refer to paradigimnoia and ask him to do his PhD thesis on it.
and caution him that his life was at risk when he used a cheap hotwire anemometer in turbulent flow