This site would not be available but for the kind co-operation of the ITU through the guise of Chris Behm, the compiler of ITURHFProp. The program calculates the HF path parameters in accordance with ITU Recommendation ITU-R P.533-13. Predicted sunspot numbers used on this site are gathered from NOAA NWPC.
Thanks are due to James Watson, HZ1JW whose hard work developed the Area Coverage page.
The Point-to-Point page and workings were developed by Mark Lawrence, M0WMT. His knowledge and creativity; designed, developed and wrote the code for this page.
The following list may be of interest to those researching HF Propagation and ITURHFProp:
ITU-R P.533-13 (2015), Method for the prediction of the performance of HF circuits, Recommendation ITU-R P.533-13
ITU BR Indices (2016), Circular of Basic Indices for Ionospheric Propagation, Latest
ITU-R P.371-8 (1999), Choice of Indices for Long-Term Ionospheric Predictions, Recommendation ITU-R P.371-8
ITU-R P.372-12 (2015), Radio Noise, Recommendation ITU-R P.372-12
ITU-R P.1148-1 (1997), Standardized Procedure for Comparing Predicted and Observed HF Sky-Wave Signal Intensities and the Presentation of Such Comparisons, Recommendation ITU-R P.1148-1
ITU-R P.1239-2 (2012), ITU-R Reference Ionospheric Characteristics, Recommendation ITU-R P.1239-2
ITU-R F.240-7 (2006), Signal-to-Interference Protection Ratios for Various Classes of Emission in the Fixed Service Below About 30 MHz, Recommendation ITU-R F.240-7
Lane, G. (1997), Required Signal-to-Interference Ratios for Shortwave Broadcasting, Radio Science, 32(5), pp2091-2098
Any comments/suggestions e-mail Gwyn Williams, G4FKH at email@example.com.