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Observer Database

The Observer Database is the list of all ground station locations ( Observers) currently in the program's memory. The Observer Information Window is used to manipulate this information. The stations are generally defined in three files:
These three files are automatically loaded at the start of the program, if they are found in the startup directory. Additional stations may be loaded (up to 1000 total) by manually reading files ( File Menu in the Observer Information Window).
Only the entries from LATLONG.QTH are directly accessible from the Observer Window. The entries are retrieved by the first field, which for Amateur Radio purposes is the callsign or ITU prefix. Non-Amateur users may wish to replace these with 3-letter airport identifiers, or other easily-remembered abbreviations. No provision for sorting the entries is made.
The entries in the other two files are used in the Show... Sites options, and for the Show DX and Print...Mutual functions.

The Principal Observer

One observer can be selected at a time. The current selection is shown in the Main Window. Entry of the position of this observer can be done by 4 means:
* Select a location from the list box and click "OK"
* Type in known latitude and longitude (see format information).
* Type in known Grid Square.
* Ctrl-click the mouse on one of the Map Windows. This will not only add that point to the list, but make it the observer.

Modifying the Database

The current observer can be modified as above. Additional points can be added by the following methods:
* Shift-click on a map. The station will be identified by its grid square.
* Load one or more additional files into the database.
At present, the only other operations permitted are Save As... to save a composite list as a new file, and Options: Add to..., to add an entry from the main list to the Launch or Special lists. However, all the files are text files in the same format, so you can also edit them with Windows NotePad.

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