My research interests lie at the intersection of satellite navigation receiver technologies and the application of navigation satellite signals for remote sensing of the space environment, atmosphere, and Earth surface. My research lab develops advanced algorithms to enable navigation in urban and indoor environments, under interference conditions, and during space weather activities. We also study the signatures of disturbances on radio waves propagating through the ionosphere, the atmosphere, and reflections off Earth surface to monitor and study the environment. During the past decade, we have deployed a worldwide network of software-defined radios to monitor radio wave disturbances. We work with signals transmitted by navigation satellites and by sources that were intended for other purposes such as communication and networking. In addition, we research new signal designs that could be potentially used for next generation satellite navigation and remote sensing.
