Amateur Radio Propagation Studies
Science, research, engineering, operating
Radio amateurs interested in the background of the complex and ever changing processes between the Sun, interplanetary space and the Earth will love this multimedia CD ROM developed and distributed by the Ernst-Moritz-Arndt University Greifswald, Institute for Physics, Germany. Learn about hidden sides of space weather, e.g. satellite failures, interruptions in mobile phone communication, radiation risks for airline passengers and even power outages here on Earth. The CD ROM supports two operation modes, i.e. the interactive version and the "museum version" which both consider a huge amount of information and impressive animations.
[February 2005]. The very first software solutions analysing amateur radio oberservations in field-aligned backscatter were apparently given by Lange-Hesse and Czechowsky at the Max-Planck-Institute for Aeronomy, Germany. This two scientists (both hold an amateur radio callsign) analysed the geophysical nature of Auroral backscatter in those days, i.e. in the 1960s. The first software directly applied in ham radio operations was created by Geoff (G3NAQ) at the Rutherford Appleton Laboratory, UK, i.e. by another scientist closely connected to amateur radio. However, personal computers were not available to radio amateurs at that time, i.e. all this software solutions were restricted to scientific mainframe computers. ...
The first software which radio amateurs have operated with their personal computers was, as far as I can see, the AURORA realtime analysis software which I have distributed in the late 1980s. That software is based on Lange-Hesse's and Czechoswsky's work (I was student at the Max-Planck-Institute for Aeronomy in those days), it supports screen maps and is capable to support dx operation by analysing Aurora and FAI band openings in realtime with high accuracy. In the 1990s, Jim (K9SE) has released his FAI assessment software SE-PROP which still is a standard tool in planning FAI dx QSOs (FAI is the mid-latiude companion of Aurora backscatter, see the Articles section of this web side for more details). The BeamFinder software came in 2001 and is based on the AURORA program extended by various additional features and analysis methods though. Distributing that software in the internet has actually motivated the creation of the df5ai.net and the beamfinder.net web site, respectively (in the chronological overview of articles, you may identify all papers referring to BeamFinder). Klaus (DJ5HG) has contributed the Auroreflex software to the ham radio community which also analyses Aurora and FAI dx propagation. You certainly know his recent publications based on Auroreflex analyses but the core software routines were already designed many years ago. Many thanks to Geoff (G3NAQ), Jim (K9SE) and Klaus (DJ5HG) for providing inside information on their software developments and for providing the screenshots. Interested readers may click the maps to retrieve further information on all software solutions.
Operating your web site in the internet, you will sooner or later receive tons of unwanted email messages, i.e. spam mail. By introducing a very simple authorization identifier, all spam mail may be now perfectly rejected by using standard email software. The following method cannot prevent spam mail being downloaded by your email client but it can identify those messages quite accurately, i.e. spam mail shows up in your mailbox never again. You may use that method on your computer without contacting your internet/email provider and it is very easy to implement. See how it works...
Running Atari ST software on an Apple Macintosh
The software QTH-LOC, Amadeus, OLGA and Aurora were all designed and operated on the good old Atari ST computer. Apple Macintosh users may still run Atari ST software by using the NoSTalgia emulator which is available at
To run NoSTalgia you also need to have an image file of the Atari ST operating system (TOS). Due to copyright regulations, this web site cannot provide the TOS file, unfortunately, but the NoSTalgia web site provides information how to retrieve it from your Atari ST computer.
Another image file is required representing DF5AI's Atari ST software. Please contact the author who will send it to you by email.