The Visualyse Log File
The values of any number of variables can be saved to a Log file at time intervals that are user definable. The log file has the same name as the simulation file and is in the same directory. Variables can be added to the file at the start of each run by selecting ‘Log Data’ from the analysis menu
A list of currently selected log variables is shown. To add a new variable press ‘Add’ then the data to be logged can then be selected by navigating the Object Tree, to point to the required variable. Note: it is possible to add multiple variables at the same time by holding the “Ctrl” key when clicking.
Data can be logged at each time step or every n time steps, where n is any integer. The logging interval is set via the Configure item of the Run menu.
The resulting log file will contain the values of all the defined variables at each required time interval. The log file can be edited using any text editor. The data in the file is tab delimited and can be imported into other Windows applications such as spreadsheets and word processors.
The example text below is copied from a log file containing two variables, the received power and the antenna elevation at an earth station tracking a non-GSO constellation
| Log data from run:c:\my documents\itu-br\example1.log | ||
|---|---|---|
| Number of logs: | 2 | |
| Time steps between logs: | 1 | |
| Time since start | Link List.SA Link Group Link-1.ForwardPath.SingleLinkCalc.[C] | Station List.Earth station4.Antennas.Antenna.Current Azelr.[Elevation] |
| Elapsed time | SingleLinkCalc [C] | Current Azelr[Elevation] |
| s | dBW | Deg |
| t = 0 days 00:00:00 | -102.99907 | 48.23921 |
| t = 0 days 00:01:00 | -103.879809 | 58.590806 |
| t = 0 days 00:02:00 | -103.968563 | 67.765593 |
| t = 0 days 00:03:00 | -102.859516 | 69.32031 |
| t = 0 days 00:04:00 | -101.75365 | 61.507881 |
| t = 0 days 00:05:00 | -100.763455 | 51.107161 |
| t = 0 days 00:06:00 | -100.071869 | 41.47703 |
| t = 0 days 00:07:00 | -99.874292 | 33.291435 |
| t = 0 days 00:08:00 | -100.239387 | 30.502836 |
| t = 0 days 00:09:00 | -101.045052 | 37.194378 |
| t = 0 days 00:10:00 | -102.087193 | 44.272388 |
| t = 0 days 00:11:00 | -103.20285 | 50.625994 |