So I am a 17 years old student who is interested in electronics and programming them (I am expirienced with Arduino). I and my friends decided that we will join a competition for all technical schools in my country. The goal of the competition is to make a project that will do something while it is flying with a balloon to the stratosphere. I had the idea to measure how the relative permittivity will change as the temperature, pressure and the humidity changes. But I have a few problems my teachers don't know how to measure it when you are looking on temperature and those factors. I have basic electronic knowledge and good programming skills (I know about electronic, currents and lot more because I am going to a technical school and we learned all). So if anyone knows how I could make that I would like to know. Thank you all, Filip.