Abstract: This paper investigates geolocation of an unknown radio source on the Earth's surface using time difference of arrival (TDOA) and frequency difference of arrival (FDOA) measurements obtained ...

ABSTRACT: Ultra-wide band (UWB) positioning technology has attracted increasing attention due to its high ranging accuracy. However, in indoor environments, non-line-of-sight (NLOS) signals ...

Passive positioning system using Starlink LEO communication signals as signals of opportunity. TDOA/Doppler-based approach with reference stations, constellation clock estimation, ionospheric ...

Dozens of leading data journalists shared some of their favorite digital tools and databases for investigating numerous topics at the recent NICAR data journalism summit. Easy, rapid geolocation is ...