REEF Estimator is an open source velocity and altitude estimator and controller for multi-rotors. This repo will help pull all the necessary packages to run the REEF estimator
As an outside user, I am unable to set up all the submodules included in this repository. I can get as far as "odom_to_velocity" before I'm prompted for a GitHub username and password. I tried using mine, and I get "remote: repository not found", indicating either the remote does not exist, or I don't have access to it.
I was able to get the parts I was interested to compile by manually downloading the dependencies, but if this repository is intended for public use, you might want to update it.