This function returns a list with all components of class zoo which have been processed from the raw data, including:
Date.OBSA zoo object containing the date data with time step consistent with the raw evaporation data in E_OBS.
E_obs.DailyA zoo object containing the daily evaporation data.
E_obs.MonthlyA zoo object containing the monthly aggregaated observed evaporation in mm.
E_obs.AnnualA zoo object containing the annually aggregated observed evaporation in mm.
E_obs.MonthlyAveA zoo object containing the monthly averaged daily evaporation from observation in mm/day.
E_obs.AnnualAveA zoo object containing the annually average daily evaporation from observation in mm/day.
Note that the components might have value of NULL when the corresponding raw data cannot be found in E_OBS.