Terrestrial VHF Propagation Path Profiler The VHF Propagation Path Profiler presented here is a comprehensive application that allows us to graphically render and mathematically compute various relevant VHF/UHF propagation metrics including VHF propagation path losses, Read More…

Antenna Bearings – Geodesic Map We present automatically rendered Antenna Bearings with Geodesic Paths projected on a Rectangular Map. Each geodesic great circle path displayed on the map originates from your location that is derived Read More…

The Great Circle Map – GCM We present an automatically rendered Great Circle Map – GCM based on your location derived from your Internet IP address. Therefore the Great Circle Map generated below should be Read More…

Multiband End-Fed Half-Wave EFHW Antenna The End Fed Half Wave antenna or the popularly known EFHW antenna has been around almost ever since the inception of HF radio. Nevertheless, the EFHW antenna had in the Read More…

SSN, SFI, Solar Data for HF Radio Propagation Here are some of the important Solar activity parametric data that are responsible for influencing the behavior of the Ionosphere on earth. These, in turn, are instrumental Read More…