Here is a YouTube video about Stefan Scholl DC9ST Introduction and Experiments on Transmitter Localization with TDOA, and is part of a growing collection of videos I have found to be useful. The reason is finding transmitter locations based on signal arrival times and understanding science related to software defined radio.
This tutorial, "Stefan Scholl DC9ST Introduction and Experiments on Transmitter Localization with TDOA" is free education you can watch, which will help you deepen your knowledge and be better prepared for licence exams, schoolwork, or operating radio equipment.