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UJ[)457 The user selects one of the options, which (except option 5) are described briefly in the following sections. Option 1 Option I is used in the day-to-day computations of transit-loss and TRF accounting; this option also is used to recompute the transit losses for the last compu- tation date. The operational steps for option I are: I. The program opens all the input files (see the "Contents of the Nexltrloss Directory" section (p. 27-29) for file descriptions] and reads the date and input data for the last transit-loss computation from the divers.fil file. 2. The program displays the date of the last computa- tion and queries the user whether or not to continue. 3. If the choice is to continue, the program queries the user to input the next computation date; if the choice is not to continue, the program returns to the program options. 4. The. program checks the input date to ensure that it is correct. 5. If the input date from step 3 is incorrect, the program returns to step 2 of this option. 6. If the input date is I day greater than the last computation date, the program (a) creates the daily output file (tlyyyymmdd) and opens it for writing; (b) writes the backl.fil file to the back2.fil file; (c) selective.ly writes the cmpJecov.fil, cSJecov.fil, divers.fil, and faJecov.fil files to the backl.fil file; and (d) proceeds to the data input. 7. If the input date is the same as the last computation date, the program displays: YOU HAVE THREE CHOICES: 1. Recompute losses for that day. 2. Select another day. 3. Return to program start. ENTER YOUR CHOICE (1,2, OR 3): 8. If choice l is selected, the program (a) reads the backl.fil file to reset the last computation date; (b) creates the daily output file (tlyyyymmdd) and opens it for writing; (c) if an output file already exists for the computation date, queries the user for permission to overwrite the existing file; (d) selectively writes the hackl.fil file to the cmpJecov.fil, cS_Tecov.fil, diveTs.fil, and faJecov.fil files to reestablish the accounting conditions prior to the last computation; and ( e) proceeds to the data input. 9. If choice 2 is selected, the. program queries the user to input a new date and returns to step 4 of this option. ,,. Option 2 Option 2 is used to analyze different NSF diver- sion alternatives; usually, this analysis would be made for the current day, just after running the accounting program for the previous day. The required input data for the current day are not avai lable yet because of the approximate 2-day lag in transit-loss computations (see the "Input Data Requirements" section, p. 6-7); therefore, it is assumed that the data from the previous day are used for input, except that alternative NSF diversion quantities could be specified. The opera- tional steps for option 2 are: I. The program opens all the input files (see the "Contents of the Nexttrloss Directory" section (p. 27-29) for file descriptions) and reads the date and input data for the last transit-loss computation from the divers.fil file. 2. The program displays the date of the last computa- tion and queries the user whether or not to continue. 3. If the choice is to continue, the program (a) queries the user to input a name for the daily output file and opens it for writing; (b) increments the last computation date by one for use in the daily output file; and (c) proceeds to data input. None of the accounting-program input and output files, except the daily output file, are, rewritten using option 2. 4. If the choice is not to continue, the program returns to the program options. Option 3 Option 3 is used to recompute the transit losses for the day prior to the day of the last computation. When option 3 is used, the accounting program also needs to be reapplied to the last day of computations, .' USER MANUAL FOR THE CURRENT (1997) VERSION OF THE TRANSIT-LOSS ACCOUNllNG PROGRAM 31 " i:.