Global Navigation Satellite Systems Engineering, Policy, and Design
Air Force Space Command released its request for proposals (RFP) Tuesday in a winner-take-all contest to build $10 billion of new GPS III satellites.
By Dee Ann Divis
Earlier this week, China launched a pair of BeiDou-3 satellites that will add to the country’s BeiDou-3 navigation constellation. To ensure the stability of the services, China continues to build and improve the domestically developed BeiDou Navigation Satellite System.
By Inside GNSS
After repeated delays the Air Force Space Command released its request for proposals (RFP) in a winner-take-all contest to build 22 new GPS III satellites.
By Dee Ann Divis
When the SpaceX Falcon Heavy rocket took off from Cape Canaveral, Fla., last week, it carried CEO Elon Musk’s red Tesla Roadster into orbit to test heavier payloads.
By Inside GNSS
This free workshop will share information about QZSS and GPS related technologies and the latest developments in the applications of this technology in a range of sectors including agriculture, autonomous driving, advanced route guidance and the maritime sector. The all-day workshop will explore avenues for future cooperation with Australian organizations, both in the private and public sectors and report on trials undertaken in Australia using QZSS applications.
By Inside GNSS
Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Em. Univ.-Prof. Dr.-Ing. habil. Dr. h.c. Günter W. Hein.
By Günter W. Hein
The opening of the New Year at the European Space Agency (ESA) came in the wake of another spectacular launch for Europe’s GNSS program; last December, four Galileo satellites were lifted into space from Kourou, French Guyana, on board the thundering Ariane 5 launcher, by all accounts leaving witnesses awestruck.
By Inside GNSS
A decision by the Department of Defense (DoD) may be what’s holding up action on the Air Force’s $10 billion plan to build 22 new GPS IIIF satellites and could increase the chances of further, perhaps substantial, delays.
By Inside GNSS
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
