SWLMap main screen

Figure 1: SWLMap Main Screen

SWLMap is a program designed to display geographical data of interest to SWL'rs. It may be used to;

Display a 'flat earth' projection of the earth, centered on the users home. The map may be recentered by either double clicking on the map or entering a location in the preferences panel.
Display day/night regions on the earth. Read more...
Display MUF predictions, calculated using the MINIMUF algorithm. Read more...
Display transmitter site information from the application SWLDataBrowser. Read more...

top

Download

top

Acknowledgements

Sincere thanks to;

Joseph Mack (Joe NA3T), for the program AZ_PROJ. A modified version of the AZ_PROJ data files are used in the SWLTool map drawing routine. AZ_PROJ allows users to draw very detailed 'flat earth' projections centred on any location. The web site is well worth a visit and may be found at http://www.wm7d.net/azproj.shtml . Joe may be contacted on jmack@wm7d.net .
Formulae to produce the flat earth map were taken from the ARRL antenna handbook, 1984. Additional formulae were taken from Ed Williams Aviation Formulae v1.33 web site, http://williams.best.vwh.net/avform.htm.
Martin Minow's (posthumous) web site http://www.merrymeet.com/minow/ was an invaluable mine of information when adding the greyline information to the flat earth map.
The formula to calculate the MUF data were presented in QST. Rose, Robert B., "MINIMUF: A simplified MUF-Prediction Program for Microcomputers" QST Dec 1982, pp 36-38.

top

Latest release - v3 more...

top