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Appendix A -Step-by-Step Mixed Station Model (MSM) Use Instructions <br />1. Open TSTooI and select all independent and dependent gages to be considered. Limit <br />the number of gages in each command file to a maximum of 95 gages, as MSM has a file <br />size limitation. A maximum of five input files can be loaded into MSM at a time, <br />although only a maximum of 300 independent and dependent gages are allowed for the <br />MSM program. Select the output year type (calendar year) but do not limit the output <br />period, as the user can select an output period in MSM. Save the command file. <br />2. Run the TSTooI command file and use the `Save Time Series as StateMod file' option. <br />When prompted for a file name, type the `filename.xbg' and save to the default folder <br />(MSM input files default to a *.xbg file extension although other extensions are <br />accepted). Open each of the *.xbg files in a text editor to ensure that the files are limited <br />to 10,0001ines. Delete comment lines or early years in the time series to reduce the <br />number of lines if over the maximum. Each gage must have data, even if it is -999 or <br />other negative value indicating missing data, for all years in the *.xbg file (note that <br />MSM recognizes any negative value as missing data). Do not try to reduce the line <br />volume by deleting some gages for one year and leaving the rest of the gages. <br />3. Open the MSM program and select the `Open' button. This should be the only option <br />available on the GUI. <br />4. Navigate to the folder where the *.xbg files are located and select one of the input files. <br />Click the `Open' button to load the input file in the MSM program. Repeat this step <br />until all input files have been loaded (maximum of five files). <br />5. Edit the user options. It is recommended to use the Simple Linear Regression type <br />(default) and the SEP Dependent Cyclicity (default). Limited information is available <br />regarding the other options in these categories. Currently, the Dependent Stations option <br />is not available in this version of the program, so all gages are considered dependent. It <br />is recommended to use the Search All Stations as Independent Stations (default). If <br />limited independent and/or dependent gages are required, it is simpler to limit the input <br />files available to the program in the first step as opposed to using these options. Set the <br />Beginning Year to determine the output period of the output files. Previous model <br />documentation indicates a maximum of 100 years of data are allowed in the MSM <br />program although the program will only allow a minimum of 1909 for the Beginning <br />Year (it is unclear whether the maximum number of years is actually less than 100 or if <br />the earliest beginning year allowed is 1909). The Beginning Year for SPDSS is 1950. <br />Set the Minimum Concurrent Values to 20 or greater to limit correlations between gages <br />with very little concurrent data. It is recommended to use a 95% Confidence Interval <br />(default). <br />6. Select the `Run' button. This will produce a DOS command prompt display while the <br />program runs. A dialog box will appear stating that the program is complete when the <br />DOS command prompt closes. Click `OK' on that box to return to the MSM GUI. <br />7. Select the `Save' button. This will produce a box with four check boxes. It is the user's <br />option to save some or all of the available files. The `Filled Data' check box must be <br />selected to save any of the other information. The `Filled Data' file provides the raw <br />regressed data. In general, the `Summary Information' file provides data regarding which <br />independent gages were used to fill each dependent gage. The `Statistical Data' file <br />Task2.doc 8 of 10 <br />