$1).$ Compute the annual average wind speed and wind power density based on the hourly data $($using

data from one of the $40$ m anemometers$).$ The columns listed with an SD in the title means Standard

Deviation of the parameter. Check the data for bad numbers $($e$.$g$.$ icing of the anemometers during

winter can cause weird or $0$ values for an extended time$)$ and delete these rows $($I had already done this

for each height but may have missed some rows that have data errors, so please check$).$