Global Navigation Satellite Systems Engineering, Policy, and Design
DENVER, August 22, 2019 – The U.S. Air Force’s second next-generation GPS III satellite, built by Lockheed Martin, is responding to commands, under control and now using its own internal propulsion system to get to orbit following its successful launch this morning.
By Inside GNSS
As the deal/no-deal Brexit conundrum continues to roil UK politics, the British government has quietly sounded out strategic partners in the so-called “Five Eyes” security alliance for help in launching its own satellite positioning system. Due to leave the European Union on October 31, the UK faces a lockout from the continent’s Galileo system and services, most crucially its–as yet unrealized–Public Regulated Service (PRS), an encrypted navigation signal for governmental-authorized users and sensitive applications, that is, the military.
By Inside GNSS
GNSS positioning is strongly challenged in urban canyon areas. The signal reflection induces multipath and non-light-of-sight (NLOS). These signal blockages and reflections are caused by the obstacles of signal transmission between the satellites and receiver.
By Weisong Wen, Li-Ta Hsu
Today, more and more integral fields of application including banking and finance, telecom networks and electricity grids, rely heavily on accurate, reliable, and traceable signals for time and synchronization.
By Ricardo Píriz, et al
Ligado Networks is pushing spectrum regulators to make a decision on its request to allow satellite frequencies near the GPS band to also be used for terrestrial 5G networks.
By Dee Ann Divis
Two years ago, Inside GNSS published a feature article describing some exciting new capabilities and business models making GNSS use a key contributor to deploying European Rail Traffic Management System (ERTMS) on local and regional lines. Today, the train control segment remains one of the most important components of the railway market. In the railway domain, this control segment also is one of the most important in terms of industrial and technological innovation, in particular in Europe with the development and the continuous improvement of the European Rail Traffic Management System/European Train Control System (ERTMS/ETCS) standards.
By Stan Goff
The European GNSS Agency’s (GSA) Skyopener project is testing the EGNSS (Galileo and EGNOS) benefits for unmanned aerial vehicles (UAVs) in an effort to help meet the needs for additional usage of Remotely Piloted Aircraft System (RPAS) in civil applications.
By Stan Goff
House and Senate lawmakers have agreed on authorizing the administration’s entire $1.757 billion budget request for the GPS program with the exception of a $10 million trim to the GPS III Follow-On (GPS IIIF) program.
By Dee Ann Divis
Safety and cost reasons led U.S. aviation regulators to choose a somewhat less efficient system for oceanic air traffic control, government watchdogs told Congress, adding that the majority of the airlines the researchers surveyed agreed with that approach.
By Dee Ann Divis
Galileo Initial Services have now been restored. Commercial users can already see signs of recovery of the Galileo navigation and timing services, although some fluctuations may be experienced until further notice, according to today’s statement from the European GNSS Agency (GSA).
By Inside GNSS
Redundancy in Galileo ground facilities may not have been enough to prevent worst-ever GNSS failure.
By Inside GNSS
The EU’s Galileo program posted an official notice on 11 July advising users that Galileo service is degraded on all satellites until further notice.
By Inside GNSS
Our source inside the European GNSS Agency (GSA), which is the EU agency responsible for Galileo services, has told us: “They are working on it. Teams from industry and the Agencies are working 24/7 to restore the Galileo services as soon as possible to their nominal levels. The current estimation is that the services should be restored within 48 hours. In any case, we expect the service to be again nominal before the end of the weekend [13-14 July 2019],” the source said.
By Inside GNSS
