[INTRO] Ham Solar is using code from Paul, N0NBH website. Its requires internet connection. [HAP CHART] Hourly Area Prediction (HAP) chart feature is also provided by this app. Its specifies the Maximum Usable Frequency (MUF) for HF communications between the base specified and any location on the map. The colors represent the MUF for communications between that location on the map and the base selected. Thus, if communications are required to or from Minneapolis, a HAP chart for Minneapolis