A (somewhat lengthy) tutorial showing you how to build a ROS2-based robot system for flying a spacecraft in the Kerbal Space Program game. If you’re just curious, or a ROS1 user looking for an end-to-end walkthrough of building something with ROS2, then this is for you. You’ll find text, diagrams, code and a video.
I’ve been experimenting a bit with Software Defined Radio, and specifically the gqrx and gnuradio tools. The I/Q (In-Phase/Quadrature components) recorder in gqrx can record .raw files, which handily record the entire spectrum visible in the waterfall window. In this blog post, I will show how to load data from those files, extract a subset of the recording, and save that into a new file. Unlike .wav files (for which a plethora of tools exist), I found little documentation on how to work with these files outside gnuradio/MATLAB/Octave.