You can specify the time window for data you want displayed in plots and tables and to perform math functions on. For example, if you have a set of HEC-DSS records ranging from October 1, 1993, to December 30, 1993, you can specify a narrower time window such as 05OCT1993 to 25OCT1993 for plots, tables, and operations with math functions.


To set the Time Window:
From the Display menu, click Time Window. The Set Time Window dialog box will open (see below).


You may select no time window, which will retrieve all the data for a data set, enter specific dates and times, use a time window relative to the current time, or access data by water year.
To access all data in a data set, select No Time Window.
To set a specific time window, select Specific Time Window.  If you wish, you can set the fields to the current time by clicking Set Current Time and then change what you want manually. To specify dates and times enter the Start Date and End Date . Although a variety of formats will be recognized for the date, the typical format is DDMMMYYYY.  To specific Times enter the Start Time and End Time in 24-hour format (e.g., for 2:00 PM, type "1400").


You may select the starting and ending dates from the calendar tool, by clicking on the button .

The calendar tool in a monthly format will open (below). You may scroll through months or years by using the appropriate arrow key at the top of the box.




To set a time window relative to the current time, select Relative to Current Time. Select the units you want to go back and forward from the current time. You can select hours, days, months, or years.
Enter the Go Back and Go Forward units.  If you do not set a unit, No Time Window will be set.

To access the DSS data by water year, from the Set Time Window dialog box select Individual Water Year. You can change the default start date of the water year from October first by setting a new date in the Start Date of Water Year box. This will read all the data in a data set and then separate it into individual data sets by water year. This setting is primarily useful when using math functions in HEC-DSSVue. If you plot data when this setting is selected, you should choose Plot Individual Data Sets. To keep your settings for the next time you run HEC-DSSVue, select Retain Between Sessions. The next time you execute HEC-DSSVue, your time window will be set.


After you click OK the Set Time Window dialog box will close and the time window settings will be applied.