The tools provided by this web application enable users to predict available frequencies, signal levels and corresponding reliabilities for High Frequency (HF) circuits for user defined paths and times. Predictions are performed using the ITURHFProp application (A software method for the prediction of the performance of HF circuits in accordance with Recommendation ITU-R P.533-14) provided by the ITU.
The ITURHFProp application is available from the ITU's website at the following location; http://www.itu.int/en/ITU-R/study-groups/rsg3/Pages/iono-tropo-spheric.aspx.
The source code for the ITURHFProp applictation is available on GitHub at https://github.com/ITU-R-Study-Group-3/ITU-R-HF.
Full details of Proppy's features may be found in the Manual, available on-line or as a .pdf download.
Three prediction modes are supported:
The following material may be of interest when researching HF Propagation and ITURHFProp;
The SWL page uses information provided by the HFCC at http://www.hfcc.org/data/.
Development of this web application has been made possible with the generous assistance of Chris Behm and George Engelbrecht, creators of the ITURHFPROP application. In addition, Bill Ingram provided valuable assistance on the construction of antenna input files.
I would also like to thank John Stephen Dumadag, REE for help with the NEC antenna modelling.
Jari's site, voacap.com, was a priceless source of inspiration for the main user interface and Jari has also generously extended permission for me to use some of the Type 14 antenna models used by voacap.com.
I'm grateful for the efforts of the following for their help with translating the site;
The shortwave schedules on the SWL page are based on information provided by the HFCC at http://www.hfcc.org/data/.
This site uses uses a number of open source tools for which I'm very grateful to the following;