HF-Prop An essential tool for all SSB and short wave radio users.
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HF-Prop Tags

predictor SSB radio wave predict propagation propagation short wave short wave logger HF radio propagation propagation predictor HF radio

HF-Prop Description

The HF-Prop application was developed to be a program for predicting the best frequencies to use for High Frequency (HF) communications between stations that are separated by distances of 200 miles or more. The results are displayed as a graph showing hourly bands of optimum frequencies throughout a 24 hour period. Even in these times of Sat-Phones and Cell Phones, High Frequency (HF or short wave) radio remains a most effective and inexpensive method of long distance communication. The equipment is relatively inexpensive and unless you use commercial radio station services to connect into the terrestrial phone system there are no phone bills to pay. When conditions are right, you can communicate with stations anywhere in the world yet, at other times, even the most powerful broadcast stations become submerged in static or fade to nothing. Short wave propagation is affected by many factors. The eleven year sunspot cycle has a major influence, and there are also daily and seasonal effects. The best frequencies to use depend also on the geographical location of the sending and receiving stations and the time of day. All in all, predicting the optimum frequency to use for a particular radio path is a complex task and a rather inexact science. However, with minimal input data, HF-Prop's advanced mathematical model can provide a valuable guide to those frequencies that will give best results and the changes that will occur over a 24 hour period. Main features: Real time sun position plotter shows regions of daylight, and greyline propagation Preloaded names and positions of Sailmail and Winlink stations and over 300 major cities Great circle route plots, course and distance measurements Split screen map display makes entering positions simpler and faster Map cursor position is shown as both latitude/longitude and Maidenhead QTH locator

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