This idea came into life after a discussion I had with LA8HGA about skip-distance on 6M and the doughnut-effect. Why not take our own log for 6M and check the distances worked. The first version was quickly programmed, but the picture was only a static one, and you had to specify a lot more parameters than I would like. The second version uses a javascript framework to display the graphs with the ability to zoom and see only a specific interval.

You can upload your adif-file. It then checks the qso for specified band and if a maidenhead locator is specified. It then builds an array and plot a graph. Click on example to see it in action, or upload your own log an check it out.

Last updated April 3rd, 2018. It should now work with https.