The GPS program appears to be struggling on several fronts recently. GPS III, the next-generation modernization project for the space and ground segments,…

By Inside GNSS

Within weeks of a bilateral working group’s recommendation for a common civil GNSS signal design, the European Galileo and U.S. GPS programs have…

By Inside GNSS

An ad hoc working group has begun sorting through issues surrounding the recent formation of the International Committee on GNSS (ICG).

By Inside GNSS

Russian officials are working to develop a plan that will meet Russian President Vladimir Putin’s directive to have the full GLONASS constellation in…

By Inside GNSS

Risk allocation, avoidance, and management are the watchwords of the day as the contract negotiation for the Galileo concession moves into its endgame.

By Inside GNSS

Q: What is adaptive nulling vs. adaptive beamforming? What are the advantages and disadvantages?

A: Adaptive arrays are perhaps the single most powerful antijamming tool in the GNSS systems engineer’s toolkit. They can provide anywhere from 15 to 90 dB of jamming rejection depending on the specific architecture used. Their main disadvantage is that they require an array of antenna elements, each spaced about four inches apart (center to center), and thus are physically large.

By Inside GNSS

The development and testing of precision ballistic and guided weapons require the occasional discharge of those weapons. For newer weapons with greater operational envelopes, this often requires testing over very large areas. To meet this growing requirement, weapon testing and training has migrated from land based firing ranges to offshore ranges, such as the U.S. Air Force (USAF) Eglin Joint Offshore Test and Training Area in the Gulf of Mexico near the northern coast of Florida.

By Inside GNSS

The Bush Administration’s Fiscal Year 2007 (FY07) budget proposal for the Department of Defense (DoD), announced in February, allocates $315,314,000 in advanced technology…

By Inside GNSS

The Russian Space Forces are continuing efforts to bring the final two GLONASS spacecraft launched December 25 into operation. One of the trio…

By Inside GNSS

Japan launched its second Multi-Functional Transport Satellite (MTSAT-2) on February 18, opening a new phase of precision air navigation and air traffic control…

By Inside GNSS

Russia gave a Christmas gift to the GNSS world with its launch of three GLONASS satellites, including two modernized GLONASS-M spacecraft, on December…

By Inside GNSS

Matthias Ruete has been named as director-general of the European Commission’s Directorate- General for Energy and Transport (EC DG-TREN), which has overall responsibility…

By Inside GNSS

Civil GPS users now have a second full signal available to them — albeit on only one satellite and “at the user’s own…

By Inside GNSS

European Space Agency (ESA) and Surrey Satellite Technology Ltd.(SSTL) operators have completed the on-orbit preparations and activated the navigation payload for GIOVE-A, the…

By Inside GNSS