Global Navigation Satellite Systems Engineering, Policy, and Design
Robustness to GPS jamming and spoofing is critical for military applications yet challenging, and numerous alternative sensing techniques have been explored over the years. Virtual aiding methods have proven effective, with the ability to constrain and localize the search space for improved operability in GPS-denied environments.
By Inside GNSS
Will the network, which some are still fighting, be ready for a September rollout, and if so, what are the implications for GPS and the people who rely on it?
By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
The NaviMoon satnav receiver is designed to perform lunar positioning using signals from GNSS satellites in Earth orbit. The test version of this unique receiver has been delivered for integration testing onboard the Lunar Pathfinder spacecraft.
By Peter Gutierrez
In this second column we consider fundamental principles of inertial navigation that derive position, velocity and angular orientation from measurements of accelerometers and gyroscopes.
By Andrey Soloviev
A novel method for improving the positioning accuracy of GNSS receivers exploits a machine learning (ML) algorithm. The ML model uses the post-fit residuals, which are readily available after the position computation from the position, velocity and timing (PVT) engine, adoptable by existing receivers without requiring any modification. The performance of this method, demonstrated using data collected with mass-market receivers as well as a Google public dataset collected with Android smartphones, shows the practicality of the concept.
By Inside GNSS
Warfighting systems rely on GPS to provide cyber-secure and accurate positioning, navigation and timing (PNT). A recent Department of Defense Operational Test and Evaluation (DOT&E) report examined, along with all U.S. tactical weaponry, the adequacy of current GPS equipment, test strategies and plans for future operational effectiveness. It found some causes for concern.
By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
The 2022 edition of the Munich Satellite Navigation Summit drew speakers (virtually) from around the world, providing a broad overview of the latest developments in the field of GNSS. A highlight was the out-of-this-world session on PNT for lunar navigation, featuring long-time collaborators ESA and NASA.
By Peter Gutierrez
With a Low-cost Single-frequency Multi-GNSS Receiver
Although precise point positioning (PPP) has been largely limited to applications in open environments using high-end GNSS receivers, recent test results demonstrate that a new PPP system with a mass-market receiver can significantly improve positioning accuracy in urban environments.
By Inside GNSS
A deadlock over 5G implementation, and the potential hazards the technology would create for air traffic safety, has been at least temporarily resolved. Not all questions have been answered nor problems eliminated, however. And while radio altimeters do not use GPS or GNSS technology, they are definitely PNT devices, and this situation could create precedents for ongoing and future conflicts between telecom and PNT use of the finite radio spectrum.
By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
Michael Ritter isn’t afraid to take risks in the name of innovation. And flying a fighter jet with your sensors, employees and a reporter onboard certainly qualifies as risky.
By Alan Cameron
With the help of Galileo signals, first responders in the European Union (EU) will have more accurate location information when calls come into the 112-emergency number, leading to faster response times and ultimately saving lives.
By Inside GNSS
The Munich Satellite Navigation Summit has opened registration for what will for be a virtual conference addressing a wide range of international GNSS topics with international speakers, held online from March 7 to 8, 2022.
By Inside GNSS
EMCORE Corporation, a provider of advanced mixed-signal products that serve the aerospace & defense, communications, and sensing markets, announced that it has entered into a definitive agreement to acquire the assets and liabilities of the L3Harris Space and Navigation Business for approximately $5 million in an all-cash transaction.
By Inside GNSS
