Swarm probes weakening of Earth’s magnetic field

https://www.raspberrypi.org/blog/outernet/

This has been rebranded as Othernet, but I posted that link to connect with your Raspberry Pi.

There is a plethora of devices for the build. Some products use more portable hardware than others. You can use a dish, but there are significantly smaller solutions as well.

Mind you, I can't deny the unmistakable / delicious layer of irony in equipping yourself in such a way, given the topic.