The whole world goes wireless. And digital. One technology is right in the center of these two megatrends: Software Defined Radio or short: SDR. Do you know how it works? And how you can take advantage of it?
Software-defined radio is a relatively new technology and was extremely expensive in the past. Then came this small USB dongle for 10$ and changed all. And other, more capable devices like the HackRF One for 300$ pushed this technology into the mainstream. Today, most modern radios used for example in Smartphones, in Amateur radio equipment, or Satellites are SDR radios.

Links:
HackRF one: https://amzn.to/2ZBXbNa
Clones: http://bit.ly/2ZEe3Df or http://s.click.aliexpress.com/e/MnOHFW5w
RTL-SDT V3: http://s.click.aliexpress.com/e/B08cnKey
RTL-SDR Dongle: http://s.click.aliexpress.com/e/EIAABSh2 (RTL2832U , R820T2 )
Adalm Pluto: https://www.analog.com/en/design-cent...
SDR-Play: https://www.sdrplay.com/
Lime SDR: https://www.crowdsupply.com/lime-micr...
Ettus Research: https://www.ettus.com/

SDR Intro by M. Ossmann: https://youtu.be/TZmHgIPBLDo
Theory behind: http://ajoo.blog/intro-to-rtl-sdr-par...
SDR Software list: https://www.rtl-sdr.com/big-list-rtl-...
Quatar-Oscar 100 WebSDR: https://eshail.batc.org.uk/nb/

SD Card Image with SDR Tools (Buster):
Frank helped me again! https://drive.google.com/open?id=1lN8...
or the writeup of the steps: https://gist.github.com/krippendorf/1...