Weeknotes: Stabilizing the PicoW Autokeyer; Ionosonde Distance to a QSO Path; Starting Google Visualization Conversions
The gang, (12 year-old Diaze aka KO6BTY, 11 year-old Mota, and 8 year-old Tawnse), and I did things with vector cross products, operated Raspberry Pis in the face of radio frequency interference (RFI) and started to update the ham radio exams Javascript charting package calls this week. Ionosphere and Cross Products KO6BTY and I put together kml files that show the approximated F2 skip of a QSO last year. The maps are very approximate because they only take the Pt Arguello ionosonde down the coast from us into consideration. To determine what other ionosondes to use data from, we needed to know how far each of the ionosondes was from the path between an arbitrary pair of QSO stations. In other words, we needed to work with spherical trigonometry. The first step was to figure out the algorithm. The solution was easy to find on StackOverflow, but it was hard to picture at first. I fixed that by getting back into using Sage for demos . The final step is shown below. Raspberry...