B: Applications Archives - Page 123 of 151 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

December 13, 2011

Lockheed Delivers GPS III Pathfinder Spacecraft

GPS III pathfinder satellite testbed. Lockheed Martin photo

The Lockheed Martin team developing the U.S. Air Force’s next-generation GPS satellites (GPS Block III) has delivered the program’s pathfinder spacecraft to the company’s Denver, Colorado–area facility.

The program remains on schedule for a 2014 launch of the first Block III space vehicle (SV).

By Inside GNSS

November 22, 2011

Figures 1, 2 & 3: Network RTK and Reference Station Configuration

Return to main article: “Network RTK and Reference Station Configuration”

By Inside GNSS

November 21, 2011

GNSS Hotspots | November 2011

One of 12 magnetograms recorded at Greenwich Observatory during the Great Geomagnetic Storm of 1859

1996 soccer game in the Midwest, (Rick Dikeman image)

Nouméa ground station after the flood

A pencil and a coffee cup show the size of NASA’s teeny tiny PhoneSat

Bonus Hotspot: Naro Tartaruga AUV

Pacific lamprey spawning (photo by Jeremy Monroe, Fresh Waters Illustrated)

“Return of the Bucentaurn to the Molo on Ascension Day”, by (Giovanni Antonio Canal) Canaletto

The U.S. Naval Observatory Alternate Master Clock at 2nd Space Operations Squadron, Schriever AFB in Colorado. This photo was taken in January, 2006 during the addition of a leap second. The USNO master clocks control GPS timing. They are accurate to within one second every 20 million years (Satellites are so picky! Humans, on the other hand, just want to know if we’re too late for lunch) USAF photo by A1C Jason Ridder.

Detail of Compass/ BeiDou2 system diagram

Hotspot 6: Beluga A300 600ST

1. Portland, Oregon and Los Angeles, California USA
TWINS!

By Inside GNSS

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Making Virtual Solid

FIGURES 1 & 2: True3D Volumetric HUD components and operation (left), Comparison of True3D HUD user view with other types of nav aids (right)

Return to main article: "True3D HUD Wins Global SatNav Competition"

Many technologies are created before their best applications are even thought about. This leads to a business phenomenon known as “technology push” in contrast to “consumer pull.” The True3D Volumetric HUD technology did not share this path.

By Inside GNSS

November 17, 2011

GPS Timing Used in Experiment to Measure ‘Faster Than Light’ Particles

OPERA neutrino detector in Gran Sasso, Italy. INFN photo

No sooner had GPS positioning helped validate key aspects of Einstein’s general theory of relativity in the Gravity Probe-B program than GPS timing has been cited as helping bring his special theory of relativity into doubt.

At issue is the so-called OPERA (Oscillation Project with Emulsion-tRacking Apparatus) experiment, inaugurated in 2006 with the main goal of studying the rare transformation (oscillation) of muon neutrinos into tau neutrinos.

By Inside GNSS

November 16, 2011

EU Launches Two Navigation Satellites; Galileo is On Its Way

Europe’s first two Galileo satellites have reached their final operating orbits, opening the way for activating and testing their navigation payloads.

Marking the formal end of their launch and early operations phase (LEOP), on November 3, control of the satellites was passed from the CNES French space agency center in Toulouse to the Galileo Control Center (GCC) in Oberpfaffenhofen, Germany.

By Inside GNSS

Oh No! Not LightSquared Again!

Please.

Please. Please. Please.

Can we please talk about something besides LightSquared?

Not yet? You mean, they are still here?

And we have so many other GNSS-related topics that deserve comment:

Some peculiar cuts in civil GPS funds and GPS III budgets being proposed by congressional committees.

A re-examination — aka analysis of alternatives — of GPS and PNT options in general. Space weather and an impending solar max. Warrantless GPS-aided tracking before the Supreme Court.

By Inside GNSS

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Network RTK and Reference Station Configuration

Q: What effect does network size have on NRTK positioning?

A: Network real-time kinematic (NRTK) positioning is nowadays a very common practice, not only in academia but also in the professional world. In the last 10 years, several networks of continuous operating reference stations (CORSs) were created to support users. These networks offer real-time services for NRTK positioning, providing centimeter-level positioning accuracy with an average distance of 25–35 kilometers between the reference stations.

By Inside GNSS

LightSquared: Who Pays for GPS Receiver Fixes Yet to be Devised?

With more testing on the horizon and a potentially alarming homeland security report about to be released, LightSquared’s efforts to begin work on its proposed wireless broadband service are stuck in the procedural mud.

The delays, which are never good for a commercial company, are piling up just as the firm’s coffers are thinning and need to be replenished with a new round of fund raising.

By Dee Ann Divis

The Digital TV Case

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

Staying In Lane

Next-generation car navigation may well require the ability to identify the lane in which a vehicle is operating on a motorway. This could support advanced driver assistance in general as well as the observation and study of driver behavior and traffic flow. Such road vehicle applications call for sub-meter positioning accuracy, often in real-time — all this preferably at low-cost.

By Inside GNSS

True3D HUD Wins Global SatNav Competition

Mike Rowe, host of the Discovery Channel series Dirty Jobs, gets behind the wheel with MVSC’s HUD system at the Makers Faire in San Mateo, California. MVSC CEO Chris Grabowski sits in the passenger seat; CTO Tom Zamojdo is in straw hat. Photo by Valerie Hall.

A San Francisco Bay Area company — Making Virtual Solid–California (MVSC), which snared a trio of awards in a global GNSS competition for its novel approach to driver assistance, is still in early phases of development.

The origins of the company, however, go back more than 40 years to the Cold War era when its principals, Chris Grabowski and Tom Zamojdo, were studying physics and theoretical mathematics at the University of Warsaw, Poland.

But more about that later — first, the news.

By Inside GNSS

November 11, 2011

Homeland Security Studies Risks to GPS, Prompts Spoof-Proof Receiver Proposal

Although a Department of Homeland Security (DHS) report on the risks posed by GPS disruptions has yet to be released, the analysis has inspired a proposal to create receivers capable of self-diagnosing spoofing attempts.

“The receiver is the first line of defense,” Logan Scott, president of LS Consulting, told members of the National Space-based Positioning, Navigation, and Timing (PNT) Advisory Board this week.

By Inside GNSS

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B: Applications

China Publishes Compass /BeiDou “Test Version” of ICD...

Spirent Launches Data Sets of World City Environments to Aid GNSS...

Lockheed Delivers GPS III Pathfinder Spacecraft

Figures 1, 2 & 3: Network RTK and Reference Station Configuration

GNSS Hotspots | November 2011

Making Virtual Solid

GPS Timing Used in Experiment to Measure ‘Faster Than Light’ Particles

EU Launches Two Navigation Satellites; Galileo is On Its Way

Oh No! Not LightSquared Again!

Network RTK and Reference Station Configuration

LightSquared: Who Pays for GPS Receiver Fixes Yet to be Devised?

The Digital TV Case

Staying In Lane

True3D HUD Wins Global SatNav Competition

Homeland Security Studies Risks to GPS, Prompts Spoof-Proof Receiver Proposal