Global Navigation Satellite Systems Engineering, Policy, and Design
The European Space Forum held annually in Brussels reflects Europe’s high-level priorities in space. This year’s edition revealed how fundamentally those priorities have changed in the face of evolving geopolitical realities.
By Peter Gutierrez
Jamming and spoofing of GNSS signals to prevent use of GNSS or to alter user position solutions has become a significant concern over the last decade, as discussed in many recent papers and articles.
By Inside GNSS
What 12 million GPS special messages reveal about military rekeying on a public channel.
By Steven J. Murdoch
This major shift in architectural framework would spatialize core SBAS components within a distributed network of LEO satellites.
By Inside GNSS
In 2017, the main message at the Munich Satellite Summit was clear: GNSS needs a backup. Nearly 10 years later, the message hasn’t changed; we may have more tools available but very little progress has been made—while the threat to GNSS only continues to grow.
By Dana A. Goward
GNSS interference is no longer a distant concern or a technical edge case. As jamming, spoofing and autonomy requirements expose the limits of today’s PNT architectures, LEO is emerging as one of the most important alternatives to understand.
By Zak M. Kassas
Over the next six issues, Dr. Güenter W. Hein will critically review the development of Galileo, drawing on more than two decades of direct experience with Europe’s satellite navigation system. But this series is not simply a look back. Galileo’s history is also a study in geopolitics, technical ambition, institutional complexity, international cooperation, spectrum management and interoperability—issues that remain central to today’s global PNT aspirations.
By Günter W. Hein
From IMU fundamentals to low-SWaP-C system design, experts explain how tightly integrated GNSS-INS is delivering resilient navigation when satellite signals are degraded, intermittent or denied.
By Renee Knight
The U.S. has fallen behind in both space-based and APNT. Now is the time to change that with new PNT policy and stronger governance.
By Dana A. Goward
A comprehensive look at various concepts related to CDF-overbounding, and a methodology for creating protection volumes that contain positioning errors with a high level of confidence.
By Inside GNSS
The methods used to establish traceability of the timing data processed by a GNSS receiver to Coordinated Universal Time (UTC), and the role calibrating the delay in the user’s receiving and processing equipment plays in realizing this traceability.
By Inside GNSS
How Analog Devices brings inertial discipline to precision agriculture.
By Inside GNSS
Authors develop and demonstrate a receiver agnostic, real-time signal cleaner that uses innovative, efficient algorithms as well as machine learning methods.
By Inside GNSS
