Laserfiche WebLink
Commands TSTool Documentation <br />TSTool Fill Techniques and Associated Commands (continued) <br />Technique <br />Command <br />Typical Use <br />Historic Year <br />FillHistYearAverage () <br />Use with yearly time series to estimate <br />Average <br />missing data as the average of annual values. <br />Interpolation <br />Fillznterpolate O <br />Use to estimate missing data by interpolating <br />between non - missing values. For example, <br />use to estimate reservoir level changes. <br />Mixed Station <br />FillMixedStation O <br />This command tries various combinations of <br />FillRegression () and <br />FillMove2 () parameters with time series <br />at different locations, to use the best <br />combination. <br />Maintenance <br />Fil1MOVE1 () <br />Use to estimate missing data using the <br />of Variance <br />Maintenance of Variance Extension <br />(MOVE. 1). For example, use to estimate <br />unregulated streamflow from a related gage. <br />This command is currently not enabled. <br />Maintenance <br />FillMOVE2 () <br />Use to estimate missing data using the <br />of Variance <br />Maintenance of Variance Extension <br />(MOVE.2). For example, use to estimate <br />unregulated streamflow from a related gage. <br />This approach has been shown to be slightly <br />better than the MOVE.1 approach. <br />Historic <br />FillPattern O <br />Similar to filling with historic averages with <br />Pattern <br />additional complexity of classifying historic <br />Averages <br />months into categories. For example, <br />historic averages for wet, dry, and average <br />periods are computed and used as the <br />historic averages. This command requires <br />thatthe SetPatternFile O control <br />command also be used. <br />Prorate <br />FillProrate () <br />Fill a time series by prorating known values <br />with another time series. <br />Regression <br />FillRegression () <br />Use to estimate missing data by using <br />ordinary least squares regression. For <br />example, use to estimate streamflow from a <br />related Rau . <br />Repeat <br />FillRepeat () <br />Use when it can be assumed that the last <br />observed value before a missing period is a <br />good estimate for missing data. For <br />example, use with "forecasted" data where <br />no future value is available for interpolation. <br />Using <br />FillUsingDiversioncomments () <br />This command is only available with the <br />diversion <br />HydroBase input type and uses diversion <br />comments <br />comments and the "not in use" flag to set <br />additional diversion amounts to zero. <br />Fill commands can be layered (e.g., use FillRegression O , then Filllnterpolate O , then <br />Fil lConstant O ). However, the analysis that occurs for each command maybe impacted by earlier <br />Commands - 8 62 <br />