To create a collection from a period of record dataset using a time window around the annual peak value in the dataset:

  • Select one or more period of record datasets.

  • From the Collections menu, select New Collection from POR Peaks.

  • You will be prompted to enter the number of days before and after ("Figure: Prompts for Days Before and After the Peak") the peak in order to define the date range.

    Figure: Prompts for Days Before and After the Peak


  • Then, just like in the previous section (POR date range), you will be prompted to enter a starting sequence number and a date for the first data point of each member of the collection.
  • Click OK to create the collection.

The plug-in will work its way through the time window of the selected POR dataset, find the peak in each year, and copy (from each year) the data within the time window you specified around the peak into a new dataset. Each new dataset will be assigned a collection member ID number starting with the sequence number you provided or with the year the new dataset was copied from. And, the time of the first value of each new dataset will be the collection start date and time you entered.