Internal function for availability
availability.int(v.avg, dir.avg, ts, start.year, start.month,
num.months, period.days, digits)Dataset containing wind speed data to be used.
Dataset containing wind direction data to be used.
Time stamp
First year of measurement period.
First month of measurement period.
Number of months.
Days of measurement period.
Number of digits.
Returns a list of:
Total availability
Daily availability