Do not operate the form until
this page and its programme have loaded completely.
your wind speed measurement in any column at the appropriate
height, e.g. 10 metres. Then click outside the field, click Submit,
or use the tab key. The programme will then calculate wind speeds
for other heights. You may plot your results in a separate window
by clicking on Plot in the appropriate column. (If the
plot window disappears, it is probably hidden behind this window).