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B: Applications

GNSS Modernization

GNSS Modernization

Christopher Hegarty

Perhaps for the first time in the nearly 40 years of satellite navigation, all four GNSS programs and regional systems appear to have firm — if not always unencumbered — development paths ahead of them.

GPS, GLONASS, Galileo, Compass/Bei- Dou, Japan’s MSAS and QZSS, and India’s GAGAN and IRNSS systems are bringing new or modernizing elements into the world. Key program enablers — such things as budgets, satellite construction, launches and launch vehicles, new signal designs — all appear favorably aligned.

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By Inside GNSS
GNSS Hotspots | March 2012
March 31, 2012

GNSS Hotspots | March 2012

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. DEAD IN THE WATER
San Francisco, California and Washington D.C., USA

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By Inside GNSS
GLONASS Plans 30 Satellites, Complete Augmentation System and Improved OCX by 2020
March 30, 2012

GLONASS Plans 30 Satellites, Complete Augmentation System and Improved OCX by 2020

Sergey Revnivykh, GLONASS program, Roscosmos

GLONASS completed its long trek back to full operational capability with 24 operational satellites in the constellation last December, but Russia intends to keep pushing ahead with its GNSS, said Roscosmos official Sergey Revnivykh at the Munich Satellite Navigation Summit in March.

GLONASS now has a 347 billion ruble (US$11.81 billion) budget approved through 2020, by which time the system is scheduled to have 24 satellites transmitting both the new CDMA and legacy FDMA signals.

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By Inside GNSS
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LightSquared Fallout May Prompt Push for GPS Receiver Standards
March 29, 2012

LightSquared Fallout May Prompt Push for GPS Receiver Standards

The firefight between LightSquared and the GPS community has sparked regulatory brush fires around Washington with the Federal Communications Commission  (FCC), Congress, a half dozen executive agencies, and numerous companies moving to address a new and likely larger battle over receiver standards, radio frequency spectrum efficiency, and RF spectrum protection.

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By Dee Ann Divis
Satellite Development Advances as GPS Survives Budget Cuts, LightSquared

Satellite Development Advances as GPS Survives Budget Cuts, LightSquared

New GPS III Test Chamber (Lockheed Martin photo)

The United States GPS program is without doubt the elder statesman of GNSS, but it has had some close calls recently.

At the 2012 Munich Satellite Navigation Summit in March, a high-level Department of Transportation offical and the head of the Air Force GPS Directorate hailed continuing progress on the Global Positioning System’s third-generation satellite development and next-generation control segment (OCX), while apparently escaping — relatively unscathed — the dual perils of Congressional budget cuts and LightSquared interference.

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By Inside GNSS
IFEN and WORK Microwave Announce More Upgrades for NavX-NCS Simulators
March 28, 2012

IFEN and WORK Microwave Announce More Upgrades for NavX-NCS Simulators

IFEN GmbH and WORK Microwave have announced a new round of enhancements to the NavX-NCS line of GNSS multi-frequency simulators.

Increased usability and control is achieved through the new NCS Control Center software release V1.7, according to the Germany-based companies. The GNSS simulators now feature motion models that simulate the physical behavior of various types of vehicles or vessels, including airplanes, trains, cars, trucks, and ships.

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By Inside GNSS
Arrow Prev
March 27, 2012

Galileo GNSS Through Children’s Eyes

Galileo by Irina of Romania

[Updated March 27] We see lots of graphs, schemata, renderings and photographic images of the GNSS satellites and constellations. Perhaps it’s time to rest the eyes with imaginative images of space and satellites through the eyes of children.

Over a number of years, up to 30 of Europe’s Galileo navigation satellites are expected to reach orbit and each of them will be named after a child from one of the 27 European Union countries.

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By Inside GNSS
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UrsaNav Tests eLoran, LF Timing Potential
March 26, 2012

UrsaNav Tests eLoran, LF Timing Potential

UrsaNav LF transmitter site for timing synchronization trials

Virginia-based engineering firm UrsaNav Inc. has begun transmitting a variety of low frequency (LF) test signals, including enhanced Loran (eLORAN), as part of a cooperative research and development agreement (CRADA) with the U.S. Coast Guard (USCG).

The test program include a comprehensive palette of signals that are being evaluated for their ability to provide a robust, wide-area, wireless precise timing alternative that can operate cooperatively with GNSS technology or autonomously during GNSS unavailability.

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By Inside GNSS
SBIRS Decision Could Undermine Prospects for GPS Dual-Launch
March 22, 2012

SBIRS Decision Could Undermine Prospects for GPS Dual-Launch

SBIRS GEO-2 satellite in Baseline Integrated System Test (BIST-1). Lockheed Martin photo.

The Air Force is poised to forego putting nuclear detonation detection sensors on the Space-Based Infrared System (SBIRS) satellites, a decision that could complicate efforts to maintain the GPS system by hampering plans to launch multiple, lighter GPS satellites on a single rocket.

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By Inside GNSS
GPS Dot Hanks image.jpg

The GPS Dot and its Discontents

In-home construction of the first civilian-owned civil GPS spoofer.

Over the last few years, several of us in the GNSS community have done our best to convince our colleagues, policymakers, and the general public that unsavory characters with GNSS jammers or spoofers are a genuine threat to GNSS and an orderly society.

"But who would want to use a jammer or spoofer?” people ask.

My response? Hackers, because they can. Thieves planning to snatch expensive cargo. A moonlighting employee in the company car. Worse yet, state actors or terrorists targeting our national infrastructure.

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By Inside GNSS
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