This is useful in operations to update a time series that was computed in the past with a newly computed average time series. The routine merges all entries with duplicated entries (read dates) being taken from avgSP2.
concat_avgSP_timeseries(avgSP1, avgSP2)
Arguments
avgSP1: old time series of average profiles as returned by averageSPalongSeason
avgSP2: new time series of average profiles as returned by averageSPalongSeason