Hi I'm based in England and wanted to know if there is a website that gives a rough indication of what countries could be received and at what time[roughly] from my location on HF. I also wondered how the HF signal actually works. I know HF skips off the ionosphere but wanted to know how far ground wave generally goes before disappearing. Is the shortwave signal made up of two parts, a groundwave and skywave/skip signal? Any feedback would be great.