Global Navigation Satellite Systems Engineering, Policy, and Design
A: Radio frequency interference (RFI) events have grown in frequency and scope to become a paramount concern for commercial, military and (especially) safety-of-life critical applications of GNSS since the Russian invasion of Ukraine in February 2022 and the Hamas attack on Israel in October 2023.
By Inside GNSS
Europe’s Galileo navigation system has taken a significant leap forward with the completion of a major upgrade to its Galileo Ground Segment. As one of the most complex ground segments ever developed in Europe, the challenge lay in seamlessly upgrading a system that serves more than four billion users globally—without disrupting service.
By Inside GNSS
Guest columnist Sergey Zotov of EMCORE Corporation covers the inconsistencies in inertial grade classification and why it’s time to standardize the terminology.
By Inside GNSS
Steve Woolven’s early experience running his family’s resort coupled with his ambitious academic pursuits helped lay the groundwork for a successful career in the PNT industry and his current role as President of Trimble Applanix.
By Peter Gutierrez
A Global Navigation Satellite System (GNSS) aims to provide Earth-based position and navigation. Spaceborne GNSS receivers have become universal sensors for spacecraft navigation, especially in low Earth orbits (LEOs), often also supporting science endeavors or acting as dedicated science payloads.
By Inside GNSS
In high-performance applications, the debate over quartz and silicon MEMS inertial sensors rages on, but guest columnist David Gaber of Epson makes the case for why products from OEMs versus integrators are superior.
By Inside GNSS
A look at how far we’ve come, where we are today and where we’re going in the effort to protect PNT and critical infrastructure when GNSS services aren’t available.
By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
A: Receiver Autonomous Integrity Monitoring (RAIM) and Advanced RAIM (ARAIM; known more generally as Solution Separation RAIM, or SS-RAIM) were originally designed to detect, alert and (where possible) exclude faulty measurements caused by Signal-in-Space (SIS) failures.
By Sam Pullen
Leveraging high-accurate Inter-Satellite Links for communication and ranging among GNSS satellites offers improved and more frequent data dissemination than ground ODTS.
By Inside GNSS
Guest columnist Mark Looney on how enhanced performance has led MEMS IMUs to be key enablers for scalable AV platforms.
By Inside GNSS
A novel approach for GPS M-code pull-in. Signal acquisition and tracking are two essential functions of a satellite navigation (satnav) receiver that allow it to form a position, velocity and time (PVT) solution.
By Inside GNSS
Q: What do we know about recent observations of GNSS interference and spoofing in Eastern Europe? What lessons can we learn regarding civil user mitigation of these threats? What can we learn from recent incidents and their impact on civil aviation?
By Sam Pullen
This year’s European Space Policy Conference in Brussels saw familiar faces talking about new and unfamiliar things. While Galileo continues to perform well, delivering an ever-widening range of services, the problem of how to get Galileo satellites into space has forced the Union to take unprecedented, forward-thinking and, for some, uncomfortable steps.
By Peter Gutierrez
