A: System Categories Archives - Page 136 of 199 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

A: System Categories

UAVs: Homeland Security Under Pressure to Take a Greater Role in GPS Anti-Spoofing
July 31, 2012

UAVs: Homeland Security Under Pressure to Take a Greater Role in GPS Anti-Spoofing

A congressional committee overseeing activities at the Department of Homeland Security (DHS) appears poised to push the agency into a more substantive role in overseeing the use of drones in the United States — a move that could force DHS to move more forcefully to protect GPS users from spoofing.

The Subcommittee on Oversight, Investigation and Management within the House Homeland Security Committee is looking to DHS to manage the civil use of unmanned aerial vehicles (UAVs) or drones.

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By Dee Ann Divis
House, Defense Department Move to Bridge GPS Modernization Funding Gap

House, Defense Department Move to Bridge GPS Modernization Funding Gap

Photo by DAVID ILIFF. License: CC-BY-SA 3.0

Both Congress and the Pentagon are putting money on the table to bridge the gap created by delays in the development of the new GPS ground system.

As Inside GNSS first reported earlier this year the Next Generation Operational Control System, or OCX, is running roughly two years behind schedule. It had been expected to be delivered in 2015, however, General William L. Shelton, the commander of Air Force Space Command, said this spring that OCX would be delayed until 2016 or 2017.

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By Inside GNSS
Brussels View: Remembrance of Things Past
July 18, 2012

Brussels View: Remembrance of Things Past

In 2003, China committed to investing €200 million (US$270 million) for the privilege of participating in the development of Europe’s Galileo program. But by 2007 it had been forced out of major decision-making because of security concerns and the collapse of the original financing plan for the program, which was to include public and private money.

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By Peter Gutierrez
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Election Politics May Stall Final LightSquared Decision
July 17, 2012

Election Politics May Stall Final LightSquared Decision

Tim Farrar, TMF Associates

While members of the GPS community are pushing to formally end the threat of signal interference from LightSquared’s proposed wireless network, the political realities of an election year suggest they will have to wait for a decision.

“There are not a lot of reasons to rush,” said Tim Farrar of TMF Associates, a consulting firm that closely follows mobile communications industry, adding it was “unlikely” there would be any progress ahead of the vote in November.

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By Dee Ann Divis
UAVs Vulnerable to Civil GPS Spoofing
July 16, 2012

UAVs Vulnerable to Civil GPS Spoofing

University of Texas–Austin drone

In June a research team from the University of Texas at Austin (UT-Austin) demonstrated for the first time that a civilian unmanned aerial vehicle (UAV) can be commandeered in mid-flight by a civil GPS spoofing attack. The result will likely factor into the Federal Aviation Administration’s (FAA’s) plans to draw up rules for integrating UAVs into U.S. airspace by 2015.

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By Inside GNSS
Galileo SVs Test ‘Dummy’ MBOC Signal in Space
July 13, 2012

Galileo SVs Test ‘Dummy’ MBOC Signal in Space

Galileo IOV’s Composite Binary Offset Carrier (CBOC) modulation on E1 Open Service signal, courtesy of ESA Off-line Analysis SIS Software

The first two Galileo in-orbit validation (IOV) satellites in space have achieved a new milestone, transmitting dummy signals in a modulation scheme designed to allow full interoperability with GPS once operational services start.

“This is an advanced modulation technique that offers robust protection against signal interference and the misleading signal reflections known as ‘multipath’,” said Marco Falcone, Head of Galileo System Services.

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By Inside GNSS
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SSTL, OHB Sign €80m Contract with OHB for Second Round of Galileo Payloads
July 12, 2012

SSTL, OHB Sign €80m Contract with OHB for Second Round of Galileo Payloads

Surrey Satellite Technology Ltd (SSTL) signed a  €80 million (US$98 million) contract today (July 11, 2012) with OHB System AG to build a further eight navigation payloads for full operational capability (FOC) Galileo satellites.

Under the contract, SSTL will deliver the second batch of FOC space vehicles (SVs), continuing a successful cooperation between the two companies to build the first 14 satellites under the supervision of the European Space Agency (ESA).

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By Inside GNSS
14th IAIN World Congress: International Association of Institutes of Navigation
July 11, 2012

14th IAIN World Congress: International Association of Institutes of Navigation

Concorde El Salam Hotel

The biennial International Association of Insitutes of Navigation (IAIN) World Congress will take place in Cairo, Egypt from October 1 to October 3, 2012, in conjunction with MELAHA 2012, the 6th Arab Institute of Navigation conference and exhibition.

The conference venue is the Concorde El Salam hotel in the tranquil Helipolis suburb, a 10 minute drive from the airport

The theme is "Seamless Navigation: Challenges and Opportunities."

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By Inside GNSS
Single- versus Dual-Frequency Precise Point Positioning
July 5, 2012

Single- versus Dual-Frequency Precise Point Positioning

Q: What are the tradeoffs between using L1-only and L1+L2 for PPP?

A: Precise point positioning (PPP) is a technique that can compute positions with a high accuracy anywhere on the globe using a single GNSS receiver. It relies on highly accurate satellite position and clock data that can be downloaded from the International GNSS Service (IGS) or obtained in real-time from a number of service providers, using either the Internet or satellite links.

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By Inside GNSS
Drones to the Rescue!

Drones to the Rescue!

August 1994, early morning. Spain’s Central Pyrenees Mountains still in darkness.

At the outset of an ascent to a 3,000-meter peak along the international border, one of the co-authors encounters a group of tourist hikers who have begun searching for a colleague who had left the camp the previous evening. In the pre-sunrise gloom, helicopters cannot yet operate.

A week later, the body of the hiker is found. The rescue efforts came, unfortunately, too late.

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By Inside GNSS
Addition of Leap Second Highlights Campaign for Its Elimination
July 4, 2012

Addition of Leap Second Highlights Campaign for Its Elimination

[Updated July 4] The world’s dominant mode of timekeeping, Coordinated Universal Time (UTC), took on another leap second on Saturday, June 30 at 23:59:60 UTC.

And then the fun began: the addition caused software handling Internet services such as LinkedIn, Pinterest, Mozilla, Reddit, StumbleUpon, Yelp, FourSquare and Gawker to behave unpredictably or even crash over the weekend.

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By Inside GNSS
Mission Accomplished: ESA Turns Out the Lights on GIOVE-A
July 3, 2012

Mission Accomplished: ESA Turns Out the Lights on GIOVE-A

ESA expert inspecting GIOVE-A in clean room in Baikonur Space Center, Kazakhstan. ESA photo

With the first two Galileo in-orbit validation (IOV) spacecraft working well, the European Space Agency (ESA) has decided to end the mission of its pioneering GIOVE-A satellite that had long exceeded it original purpose and design life.

Meanwhile, with the next Galileo launch approaching, ESA has expanded its Radio Navigation Laboratory (RNL) to meet the testing needs of Europe’s GNSS program.

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By Inside GNSS
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