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TSView Time Series Viewing Tools <br />Appendix - TSView - 4 <br />The following table summarizes important ti me series terminology. <br /> <br />Time Series Terminology (listed alphabetically) <br /> <br />Term Description <br />Data Interval Time interval between time series data values. If a regular time series, <br />the interval is constant. If an irregular time series, the interval can vary . <br />Intervals are represented as an optional multiplier followed by a base <br />interval string (e.g., 1MONTH , 24HOUR ) or IRREGULAR for irregular <br />time series. <br />Data Source A string abbreviation for a data source, which is part of the time series <br />identifier and t ypically indicates the origin of the data (e.g., an agency <br />abbreviation, or a model name if the result of a simulation). <br />Data Type A string abbreviation for a data type, which is part of the time series <br />identifier (e.g., Streamflow ). <br />Date/Time Precision Date/time objects used with time series have a precision that corresponds <br />to the time series data interval. The precision is typically handled <br />transparently but it is important that the precision is consistent (e.g., <br />monthly data should not use date/time objects with daily precision). <br />Displaying time series with various precision usually results in the <br />smallest time unit being used for labels. <br />Input Name A string input name corresponding to an input type, which is part of a <br />time series identifier. For database input types, the name may be omitted <br />or may be the name of the database connection (e.g., ARCHIVE ). For <br />input files, the name is typically the name of the file. <br />Input Type A string abbreviation that indicates the input type (persistent format) f or a <br />time series, and is part of a time series identifier. This is often the name <br />of a database (e.g., HydroBase , RiversideDB ) or a standard data file <br />format type (e.g., StateMod , MODSIM , RiverWare ). <br />Location A string identifier that is part of a time se ries identifier and typically <br />identifies a time series as being associated with a location (e.g., a stream <br />gage or sensor identifier). The location may be used with certain input <br />types to determine additional information (e.g., station characteristics may <br />be requested from a database table using the location). <br />Scenario A string label that is part of a time series identifier, and serves as a <br />modifier for the identifier (e.g., HIST for historical). <br />Sequence Number A number indicating the sequence position of a time series in a series. <br />For example, possible time series traces may be identified with a <br />sequence number matching the historical year for the data. The use of <br />sequence numbers with traces is being evaluated. <br />Time Series Product A graph or report that can be defined and reproduced. See the Time <br />Series Product Reference section. <br />Time Step See Data Interval. <br /> <br />158