His focus is on GNSS, from the raw measurements to location, to fusion with other location technologies. Prior to Google, Mr. Riley worked on GNSS location estimation at Qualcomm, working with hardware, measurement and OS teams, and led the GNSS-Inertial Location software development in use on billions of devices today. He holds a M.S. in Astronautical Engineering from Stanford, a B.S. in Engineering from Harvey Mudd, and has authored or co-authored 46 patents across GNSS, network and inertial location.