Global Navigation Satellite Systems Engineering, Policy, and Design
The $2 billion lawsuit filed by Harbinger Capital Partners against Apollo Global Management over whether Apollo knew about GPS interference issues has been stayed yet again—again at the request of Ligado Networks, the current holder of the frequencies involved.
By Dee Ann Divis
New York City reportedly had its government wireless network knocked out on April 6 when the GPS week number in signal’s message rolled over—that is when the system, as planned, reset its week counter back to zero.
By Dee Ann Divis
GNSS spoofing is more wide spread than previously believed and being used to not only misdirect satellite navigation users but to deny GNSS service altogether, according to a new report by the Center for Advanced Defense Studies, a non-profit that analyzes transnational security issues.
By Dee Ann Divis
As part of the development of a National Spectrum Strategy, the U.S. Department of Agriculture (USDA) is asking for feedback on future spectrum needs in rural America and, more importantly for the GNSS community, on what spectrum needs to be protected.
By Dee Ann Divis
The U.S. Air Force’s Space and Missile Systems Center’s Global Positioning Systems Directorate achieved another major program milestone March 19, successfully delivering the second GPS III Space Vehicle to Astrotech Space Operations in Titusville, Florida, to begin satellite launch processing.
By Inside GNSS
While several smartphone models currently are fitted with chipsets from both Broadcom and Qualcomm Technologies and already have dual-frequency solutions that support Galileo E1/E5a signals, expectations are that we’ll soon see a significant increase in Galileo users coming from the United States.
By Inside GNSS
According to a news report,“Sprut-N1 [a] new-generation precision navigation radio system (RNS) has been created for the Russian Navy. It will determine geographic location, speed and altitude with a precision superior to that of GLONASS and GPS. The coordinates are determined by ground stations of the system which transmit coded signals to warships and aircraft. The main advantage against satellite navigation is that the signal of the high-tech system cannot be jammed, the Izvestia daily writes.”
By Dana A. Goward
A dozen geospatial organizationswith a total of more than 170,000 members have registered their opposition to plans by Ligado Networks to use frequencies neighboring the satellite navigation band for terrestrial services.
By Dee Ann Divis
With the swipe of a pen President Donald Trump set in motion the creation of a U.S. Space Force to help boost and focus efforts to defend U.S. space assets as other nations build out their capacity to cripple America’s on-orbit capabilities.
By Dee Ann Divis
Two recent reports have underscored the threats to the GPS system from space-capable adversaries. Both the Worldwide Threat Assessment, released Jan. 30 by the Senate Select Committee on Intelligence, and theDefense Intelligence Agency’s newly released Challenges to Security in Spacedetail the potential for China, Russia and others to damage the constellation or disrupt its signals.
With worries mounting about these risks, and the more mundane but still harmful prospect of regional jamming or spoofing, organizations throughout the U.S. government are working on ways to address vulnerabilities and find ways to operate without GPS.
By Dee Ann Divis
The Smart Tachograph (ST), the new revision of the Digital Tachograph (DT), aims to improve safety in the transportation sector by monitoring the behavior of commercial drivers. For this purpose, data from several sensors, including a GNSS receiver, are recorded, processed and cross-validated. In this article, the motion conflict procedure adopted by the ST is reviewed and experimentally evaluated using data collected in light urban and highway environments.
By Günter W. Hein
Since last reported in the November/December 2016 issue of Inside GNSS, significant progress has been made to extend the use of Global Navigation Satellite Systems (GNSS) for Positioning, Navigation, and Timing (PNT) in High Earth Orbit (HEO). This update describes the results of international efforts that are enabling mission planners to confidently employ GNSS signals in HEO and how researchers are extending the use of GNSS out to lunar distances.
By Inside GNSS
Accurate and reliable timing and synchronization can be an enabler of diverse new applications in datacenters. Accurate clocks across different nodes make possible key functions like consistency, event ordering, causality and the scheduling of tasks and resources with precise timing. In this article the authors take a close look at scalable and traceable time for datacenters using GNSS and White Rabbit.
By Inside GNSS
