B: Applications Archives - Page 150 of 178 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

New Austerity Squeezes GPS as DoD Tightens Its Belt

Embracing the need for debt-driven discipline, the White House has revised its strategy for the nation’s defense, taking a more fiscally constrained approach that reduces the number of troops and future spending on defense systems.

The new plan, formally announced January 5, was already being put into effect last summer. “The strategic guidance was the compass by which we steered the budget review leading to the president’s budget for fiscal year ‘13 and the years thereafter,” Deputy Secretary of Defense Ashton B. Carter told reporters.

By Dee Ann Divis

Winging It

FIGURE 1: Competitive group skydiving is currently judged by overlaying a grid on a photo and evaluating location of divers within its cells. Photo by Mark Harris.

»NovAtel Inc. wingsuit video

In 1589, at the age of 25, Galileo Galilei toiled up the 294 steps of a 55-meter bell tower in Pisa, Italy, where he was tutoring math students at the time.

According to his pupil and later biographer, Vincenzo Viviani, Galileo carried with him two cannonballs, one twice the weight of the other. When he reached the top of the tower, he went to the lower balcony of the tilted structure and dropped the two balls simultaneously.

By Inside GNSS

Raytheon Gets New Contract for GPS OCX Launch and Checkout System

In the latest in a series of GPS modernization contracts, the U.S. Air Force Space and Missile Systems Center has awarded Raytheon Company a $27.4 million contract to develop a GPS Launch and Checkout System (LCS), which will provide early launch and checkout of GPS III satellites starting with the first GPS III launch in 2014.

By Inside GNSS

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January 12, 2012

USAF Awards Lockheed Additional GPS IIIA Satellite Buy

The U.S. Air Force has awarded Lockheed Martin a $238 million contract for production of the third and fourth satellites in the next-generation GPS constellation, known as GPS III. The acquisition of the next two GPS IIIA satellites at one time will allow the Lockheed Martin-led team to maximize efficiencies in satellite manufacturing.

By Inside GNSS

January 11, 2012

Lockheed Gains GPS III Launch & Checkout Contract

GPS III satellite. Lockheed Martin illustration

The U.S. Air Force has awarded Lockheed Martin a $21.5-million contract to provide a launch and checkout capability (LCC) to command and control all GPS III satellites from launch through early on-orbit testing.

By Inside GNSS

December 27, 2011

China Publishes Compass /BeiDou “Test Version” of ICD; Key Data Missing

[Updated January 3, 2012] China released a long-awaited “test version” interface control document (ICD) for its Compass (BeiDou-2) GNSS system today (December 27, 2011). The 11-page publication covers its open B1 civil signal centered at 1561.098 MHz.

By Inside GNSS

December 26, 2011

Spirent Launches Data Sets of World City Environments to Aid GNSS Receiver Testing

Spirent Communications has launched of a subscription service for live GNSS (GPS, GLONASS, and QZSS) environmental-capture data set samples, recorded at major locations worldwide, in challenging urban and suburban conditions.

The data sets are designed for use with the company’s GSS6400 GNSS Record and Playback test System. They encompass a variety of recorded scenarios ranging from drive-through multi-level roads, tunnels, and car parks to drive-throughs in downtown areas with high-rise buildings.

By Inside GNSS

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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

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

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B: Applications

Optimal Aligning of the Sums of GNSS Navigation Signals...

Code Tracking and Pseudoranges...

New Austerity Squeezes GPS as DoD Tightens Its Belt

Winging It

Raytheon Gets New Contract for GPS OCX Launch and Checkout System

USAF Awards Lockheed Additional GPS IIIA Satellite Buy

Lockheed Gains GPS III Launch & Checkout Contract

China Publishes Compass /BeiDou “Test Version” of ICD; Key Data Missing

Spirent Launches Data Sets of World City Environments to Aid GNSS Receiver Testing

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