5 papers
Chasing Lightning: Detecting, Characterizing, and Identifying a Powerful Space-Based GNSS Interference Source
Zachary L. Clements, Argyris Kriezis, Todd E. Humphreys
This paper analyzes and identifies a space-based Global Navigation Satellite System (GNSS) interference source that has caused scores of powerful transient wide-area interference e…
GPU-accelerated Direct Geolocation of GNSS Interference
Jacob S. Clements, Zachary L. Clements
In recent years, there has been a sharp increase in Global Navigation Satellite Systems (GNSS) interference, which has proven to be problematic in GNSS-dependent civilian applicati…
Single-Satellite-Based Geolocation of Broadcast GNSS Spoofers from Low Earth Orbit
Zachary L. Clements, Patrick B. Ellis, Iain Goodridge +3
This paper presents an analysis and experimental demonstration of single-satellite single-pass geolocation of a terrestrial broadcast Global Navigation Satellite System (GNSS) spoo…
Timing Properties of the Starlink Ku-Band Downlink
Wenkai Qin, Andrew M. Graff, Zachary L. Clements +2
We develop signal capture and analysis techniques for precisely extracting and characterizing the frame timing of the Starlink constellation's Ku-band downlink transmissions. The a…
Carrier-phase and IMU based GNSS Spoofing Detection for Ground Vehicles
Zachary Clements, James E. Yoder, Todd E. Humphreys
This paper develops, implements, and validates a powerful single-antenna carrier-phase-based test to detect Global Navigation Satellite Systems (GNSS) spoofing attacks on ground ve…