text:  So we can literally turn a dish towards the Earth to see whether or not the signal is coming from the Earth, and we can turn it towards the sky to show whether or not it's only coming from the sky. And then we also have omnidirectional tools, which give us a sense of what's happening all around us and the intensity of which they're coming from. So you can pair omnidirectional with directional to find where it's coming from, and in some cases, Lisa, where it's going to.