Here are two topics that are entirely unrelated:
The positive one is that I would like to share with you some great open educational resources (OER) on global navigation satellite systems and the atmosphere from a project called TRYAT (“TRack Your ATmosphere”) by the OSZ Lise Meitner school in Berlin. The material is in English, includes some phyphox activities and can be found on their website as “Intellectual Output 3: GNSS and Atmosphere”.
The unrelated bad news is that several events have been cancelled due to the coronavirus outbreak. For the upcoming weeks, we will unfortunately not have a chance to meet at the Sinus-Congress in Bochum, the JuLe-meeting in Berlin and the DPG spring meeting in Bonn, as all three have been cancelled.