prop.kc2g.com: Developing an Open-Source HF Propagation Prediction Tool

prop.kc2g.com is a website with the goal of making HF conditions visible at a glance and helping amateurs choose times and frequencies for contacts. The creator will give some highlights of the site's genesis and evolution from 2018 to 2021 and explore the mathematical techniques used to combine live observational data with a computerized ionospheric model to get the benefits of both.