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provides data regarding the statistical difference between the original and the <br />regressed/filled data including standard deviations, averages and other statistical <br />comparisons. The `Fill Additional Missing Data with Average Values' file provides the <br />original data, regressed data and fills with historical averages any data that could not be <br />filled with regression. If multiple input files are used the `Statistical Data' and `Fill <br />Additional Missing Data with Average Values' files will not be available as there is a bug <br />with the program that prevents their creation. Select which check boxes are desired, <br />although it is recommended to save all the available data and then select `Continue' . No <br />data will be saved if the `Cancel' button is selected. <br />8. The user will be prompted for the name and location to save each of the selected output <br />files, one file at a time. As with the MSM input file, the model provides default file <br />extensions for each output file type but allows the user to override the default extensions. <br />Note, however, that if the user changes one of the output file default extensions during <br />the process of saving multiple output file types, MSM no longer provides the default <br />extensions for the remaining files in that saving process. <br />9. After all the output files are saved, exit the MSM program and view the output files in a <br />text editor program. Note that when viewing the output files, there is a default October <br />through September (WY) header. It does not change even if the time series is in <br />Calendar format. The data format in the output file will be in the same as the input file. If <br />the Calendar Year format is used in the input file, the data in the output file will be in <br />Calendar Year as well despite the headers. <br />Users should be aware of the following specific MSM program issues: <br />• Output file header must be edited prior to using in TSTooI. The MSM GUI allows <br />the user to define the beginning analysis year, which controls the analysis and the <br />resulting time series data written to the MSM output file (*-l.xbf). However, it appears <br />that MSM copies the header line from the MSM input file and does not update the header <br />to reflect the user-defined beginning year. The beginning year in the header line must be <br />hand-edited to accurately reflect time series data before bringing the data back into <br />TSTooI or using it in other modeling efforts. <br />• Beginning year cannot be set earlier than 1909. Previous MSM model documentation <br />(Frick and Wellborn) indicates that up to 300 stations can be analyzed with 100 years of <br />record. However, MSM imposes a beginning year of 1909 if the user attempts to set a <br />beginning year prior to 1909 (the program appears to have a hardwired beginning year of <br />1909). <br />• Output file comment lines always show water year headings. The data headings in <br />the MSM output file default to water year format headings even if the input data format is <br />in calendar year format. The output data actually remains in the same format as it was <br />provided in the input file, but the column headers always reflect water year. <br />• Inability to select the dependent gages. The program fills every gage in the input file. <br />The MSM GUI option to select the dependent gages is currently disabled. Output files <br />could be smaller and more manageable if dependent gages could be specified. <br />• Problem in creating all output files when using multiple input files. When the user <br />opens more than one input (*.xbg) file, runs the model, and attempts to save the statistical <br />data (*.sts) file, the program produces a runtime error. The regression results (*-l.xbf) <br />Task2.doc 9 of 10 <br />