GPS Archives - Page 85 of 163 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

May 22, 2015

Contract Supports New Tests of eLORAN as GPS, PNT Backup

Exelis, UrsaNav, Inc., the Department of Homeland Security’s Science and Technology Directorate (DHS S&T), and the U.S. Coast Guard (USCG) have entered into a cooperative research and development agreement (CRADA) to test and demonstrate enhanced Loran (e-LORAN) service from former LORAN-C sites.

These sites are the legacy ground-based radio navigation infrastructure of the decommissioned LORAN-C service that could be retained and upgraded to provide eLORAN low frequency service.

By Inside GNSS

May 20, 2015

Estimating the Short-Term Stability of In-Orbit GNSS Clocks

Global navigation satellite systems provide position, velocity, and time (PVT) solutions to users whose receivers calculate position based on one-way ranging from satellites. As is well-understood, a key step in the positioning process involves a determination of the difference between the time of signal transmission identified in the satellite’s broadcast navigation message and the time of its reception by user equipment.

By Inside GNSS

Thinking Small

Equations 2, 7, 8, 9, 10 & 11

Unmanned aerial vehicles (UAV) are finding increased application in both domestic and governmental applications. Small UAVs (maximum take off weight less than 20 kilograms) comprise the category of the smallest and lightest platforms that also fly at lower altitudes (under less than 150 meters).

Designs for this class of device have focused on creating UAVs that can operate in urban canyons or even inside buildings, fly along hallways, and carry listening and recording devices, transmitters, or miniature TV cameras.

By Inside GNSS

Same Issues, Fierce Debate as LightSquared Bankruptcy Ends; GPS Spectrum Battle Reappears

After three years in Chapter 11, the company whose planned wireless broadband system threatened to overload GPS receivers across the United States is preparing to emerge from bankruptcy.

By Dee Ann Divis

May 18, 2015

CSNC 2015 Raises BeiDou, GNSS Profile in China

More than 3,000 delegates converged on China’s ancient capital of Xi’an last week to infuse the sixth China Satellite Navigation Conference (CSNC) with an energy reflecting the nation’s robust GNSS program.

By Inside GNSS

Riding High with EGNOS

The Pink City from up there. Photo by Peter Gutierrez

Judging from the variety of questions being asked at a recent EGNOS flight demonstration, the European Geostationary Navigation Overlay Service (EGNOS) remains something of a mystery for many of Europe’s leading aviation writers.

EGNOS, you say? What’s EGNOS?

By Inside GNSS

House Lawmakers Cut Civil GPS Funding across the Board

The House Appropriations Committee voted May 13 to cut the White House request for civil GPS funding and a number of other GPS-related program at the Dept. of Transportation.

By Inside GNSS

GAO Report, Senate Subcommittee Hearing Confront USAF on GPS III Programs

GPS III satellites and their new ground system, both years behind schedule and hundreds of millions of dollars over budget, still may not be on track despite corrective actions, Air Force Secretary Deborah L. James told a U.S. Senate hearing recently.

By Inside GNSS

May 14, 2015

USAF Draft RFP Would Re-Open Competition for GPS Satellite Launch Services

GPS Block IIF-5 on its way from Cape Canaveral on February 20, 2014. Photo by Ben Cooper, United Launch Alliance

[Updated May 26, 2015] The U.S. Air Force released a draft request for proposal (RFP) yesterday (May 13, 2015) for GPS III Launch Services, including launch vehicle production, mission integration, and launch operations. The Space Exploration Technologies Corporation — better known as SpaceX and headed by Elon Musk — may well enter the competition.

By Inside GNSS

May 7, 2015

International Working Group Agrees on Common GNSS SBAS Message Design

The next decade’s aircraft pilots will be able to rely on enhanced, reliable GNSS satellite navigation signals on a seamless basis across much of the world, thanks to decisions made at the latest gathering of worldwide GNSS augmentation system providers and experts.

By Inside GNSS

Trimble Launches Multi-GNSS, Inertial Module and Enclosure

Trimble’s BD935-INS (left) and BX-935-INS

Trimble has introduced the BD935-INS module that combines a multi-frequency, multi-GNSS receiver with an integrated 3-D microelectromechanical systems (MEMS) inertial sensor package.

As part of Trimble’s GNSS OEM portfolio, the new compact module augments real-time precise positioning with 3-D orientation, connectivity, and configuration capabilities designed to enable system integrators and OEMs to add GNSS and attitude to specialized or custom hardware solutions.

By Inside GNSS

May 6, 2015

Lockheed Completes Integration of First GPS III Spacecraft

In April, Lockheed Martin fully integrated the U.S. Air Force’s first next-generation GPS III satellite at the company’s Denver, Colorado–area satellite manufacturing facility. The first in a design block of new, more powerful and accurate GPS satellites, GPS III Space Vehicle One is now preparing for system-level testing this summer. Lockheed Martin photo

Lockheed Martin has finally been able to announce victory in its effort to complete integration of the first GPS Block III satellite.

Integration took place last month at the company’s GPS III Processing Facility near Denver, Colorado, bringing together the system module — which includes the navigation payload that performs the primary positioning, navigation, and timing mission — the functional bus containing the electronics that manage all satellite operations, and the propulsion core that enables the satellite to maneuver for operations on orbit.

By Inside GNSS

May 1, 2015

Forsberg Acquires Starlink GNSS Accessories Product Line

Forsberg Services Ltd. has announced its recent acquisition of the StarLink product line from Raven Industries. StarLink products include inline amplifiers, coaxial down/up converters and fiber-optic link systems to enable and support extended cable runs for GNSS in navigation and time synchronization applications.

By Inside GNSS

GPS

Still Not a Thing, Part 2...

Farm Vehicle Automation...

Contract Supports New Tests of eLORAN as GPS, PNT Backup

Estimating the Short-Term Stability of In-Orbit GNSS Clocks

Thinking Small

Same Issues, Fierce Debate as LightSquared Bankruptcy Ends; GPS Spectrum Battle Reappears

CSNC 2015 Raises BeiDou, GNSS Profile in China

Riding High with EGNOS

House Lawmakers Cut Civil GPS Funding across the Board

GAO Report, Senate Subcommittee Hearing Confront USAF on GPS III Programs

USAF Draft RFP Would Re-Open Competition for GPS Satellite Launch Services

International Working Group Agrees on Common GNSS SBAS Message Design

Trimble Launches Multi-GNSS, Inertial Module and Enclosure

Lockheed Completes Integration of First GPS III Spacecraft

Forsberg Acquires Starlink GNSS Accessories Product Line