Global Navigation Satellite Systems Engineering, Policy, and Design
As Desi Arnaz often said to Lucille Ball during an “I Love Lucy” episode on TV, “You’ve got some ’splaining to do.”
I refer, of course, to the untoward and unexpected initiative by the British Ministry of Defense (MoD) to patent the technical innovations that underlie the planned next generation of civil GNSS signals.
By Dee Ann Divis
Return to main Washington View article: "USPTO Nears Approval of Troubling British Patent on New GPS Civil Signal"
By Dee Ann Divis
Q: How do GNSS-derived heights differ from other height systems?
A: Height estimation using GNSS always seems to be trickier than horizontal coordinate estimation.
Why?
On the one hand, the GNSS technique has error sources that are more critical in the vertical direction. Height estimates are weaker because of a combination of satellite geometry, the presence of strong correlations to other parameters, such as atmospheric delays, and the antenna phase center model applied during data analysis.
By Inside GNSS
Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.
By Inside GNSS
1. DEAD IN THE WATER
San Francisco, California and Washington D.C., USA
Return to main article: "Peer-to-Peer Cooperative Positioning"
By Inside GNSS
Return to main article: "Peer-to-Peer Cooperative Positioning"
By Inside GNSS
Oh no! Not another learning experience!
Bumper sticker wisdom after the fact, but better late than never.
As this issue of Inside GNSS heads off to the printer, the regulatory phase of the GPS/LightSquared controversy appears to be winding down, and the litigation phase warming up.
By Dee Ann Divis
The firefight between LightSquared and the GPS community has sparked regulatory brush fires around Washington with the Federal Communications Commission (FCC), Congress, a half dozen executive agencies, and numerous companies moving to address a new and likely larger battle over receiver standards, radio frequency spectrum efficiency, and RF spectrum protection.
By Dee Ann Divis
Working Papers explore the
technical and scientific themes that underpin GNSS programs and
applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.
