Global Navigation Satellite Systems Engineering, Policy, and Design
GPS firms are concerned about a proposal by another L band satellite firm to build more ground terminals as part of a combined satellite-ground communication network.
By Inside GNSS
Another month is slipping away with no sign of the Request for Proposals (RFP) for the multi-billion dollar GPS III contract.
By Inside GNSS
Shanghai, China-based ComNav Technology Ltd. announced this week that it has successfully been tracking and analyzing the BD-3 satellite signals to bring better high-precision positioning services in the near future.
By Inside GNSS
All applications of satellite navigation show a strong growth. They can now rely on four global systems (GPS, GLONASS, Galileo and BeiDou) and additional regional systems, sometimes aiming for future global extension (QZSS, NavIC). All these systems and their applications rely on very limited satellite orbit spectrum. This article is providing background and insights on the growing pressure on this limited resource, giving rise to proposals for “sharing” spectrum. How satellite navigation will survive and find the necessary spectrum resources to grow is reviewed in details in the following paragraphs.
By Ingo Baumann
Q: What is navigation message authentication?
A: As of today, all open civil GNSS signals are transmitted in the clear, conforming to interface specifications that are fully available in the public domain. Receivers will accept any input that conforms to the specifications and treat it as if it came from a GNSS satellite. Combined with the extremely low power levels of GNSS signals this makes it almost trivially simple to spoof a GNSS receiver.
By Inside GNSS
The Air Force is scouring the landscape for its next round of receiver technology now that the first increment of its military receiver development program is moving into a deeper testing phase.
By Dee Ann Divis
Phil Falcone’s Harbinger Capital is seeking $2 billion in damages for "massive fraud" alleging that Apollo Global Management and others sold it on a plan to launch a terrestrial broadband network while concealing test results showing the network would cause crippling GPS interference and be unlikely to be approved. Assertions
By Inside GNSS
An additional delay in release of the GPS III RFP emerged just as federal watchdogs released a new report detailing the challenges Air Fore managers will face in keeping all the components of the modernization program on track.
The long-expected report from the Government Accountability Office looks at the overall effort to update GPS including developing a new ground system, more capable receiver cards for military equipment and new satellites to sustain and improve the constellation.
By Inside GNSS
Senate lawmakers have introduced a bi-partisan bill giving the Department of Transportation (DoT) responsibility for launching a GPS timing backup and a two-year deadline to get it up and running.
By Inside GNSS
Viewers watching Arianespace’s live video webcast Tuesday witnessed a successful launch that began at approximately 1820 GMT (1:20 p.m. EST).
By Inside GNSS
Close to 300 users attended the 1st Galileo User Assembly, held in Madrid, Spain on November 28-29. The users, along with several expert presenters, came together for the first EGNSS User Consultation Platform to share their experience, discuss their needs and provide feedback on Galileo performance, one year after the launch of Galileo Initial Services.
By Inside GNSS
Big news came out of Washington, D.C. earlier this week regarding BeiDou and GPS as the United States and China have negotiated compatible signal characteristics that will both protect and enhance service for users of the U.S. Global Positioning System (GPS) and the equivalent Chinese system.
By Inside GNSS
UPDATE: Today’s the day. Check back to the Inside GNSS website for updates on today’s launch.
A European Ariane 5 rocket followed dual rail tracks across the Guiana Space Center in South America on Monday on the way to its launch complex Monday, a day before today’s scheduled blastoff with four satellites to expand the Galileo navigation network. Also, you can follow the launch live at Spaceflight.com.
By Inside GNSS
