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L-3 IEC Announces First-Ever Successful Gun Firing of Next-Generation M-Code GPS Receiver

L-3 IEC Announces First-Ever Successful Gun Firing of Next-Generation M-Code GPS Receiver

L-3 IEC Tru-Trak SIP

L-3 Communications announced today (June 14, 2012) that its Interstate Electronics Corporation (L-3 IEC) business has successfully completed multiple test firings of its next-generation Military Code (M-code) GPS receiver technology.

This milestone represents a significant breakthrough in GPS receiver modernization and validates the unit’s survivability and performance in extreme, guided munitions environments, according to an L-3 IEC news release.

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By Inside GNSS
GSA Issues Second GNSS Market Report: 1.1 Billion Units by 2020
May 31, 2012

GSA Issues Second GNSS Market Report: 1.1 Billion Units by 2020

The European GNSS Agency (GSA) has published its second GNSS market report, including a special focus on maritime and surveying application markets and refining its projections of unit and sales revenue volumes through 2020.

According to the new GSA report, the worldwide GNSS market is growing rapidly with total market size expected to increase at an average of 13 percent per year until 2016. At that point, increasing market saturation, price erosion, and platform convergence will reduce the growth rate.

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By Inside GNSS
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Air Force Awards Service Support Contract for GPS III SVs

Air Force Awards Service Support Contract for GPS III SVs

The U.S. Air Force has awarded Lockheed Martin a $68 million contract to provide mission readiness, launch, early orbit checkout, and on-orbit operations engineering support for the first two GPS III space vehicles.

Under the contract, Lockheed Martin will provide technical support to the Air Force’s 2nd Space Operations Squadron (2SOPS) and monitor the health and performance of the first two GPS III satellites from launch through their 15-year operational design lives.

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By Inside GNSS
Thales Plans Next Steps in GNSS Technology Evolution
May 30, 2012

Thales Plans Next Steps in GNSS Technology Evolution

Thales TOPSTAR 100 receiver

French manufacturer Thales, the only non-U.S. company to offer GPS SAASM (Selective Availability Anti-Spoofing Module) receivers, is working on next-generation receivers for commercial aviation and military markets that will incorporate new signals and multiple GNSS systems.

Since the late 1990s, the company has delivered between 8,000 and 10,000 avionics installations in military and civil domains, according to Pierre Bouniol, GNSS Products Department manager, including multi-mode GPS receivers in stand-alone and enclosure configurations.

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By Inside GNSS
NovAtel, Interstate Electronics Team on SAASM RTK Receiver Board

NovAtel, Interstate Electronics Team on SAASM RTK Receiver Board

NovAtel Inc. today (May 30, 2012) announced the development of their OEM625S Selective Availability/Anti-Spoofing Module (SAASM) GNSS receiver, the first product emerging from a collaborative effort with L-3 Interstate Electronics Corporation (IEC).

The OEM625S, which becomes available for purchase in the third quarter of this year, will combine a commercial dual-frequency NovAtel GNSS receiver with an L-3 IEC XFACTOR SAASM in a single card solution, reducing overall size and power requirements for end customer applications.

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By Inside GNSS
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GNSS Hotspots | May 2012
May 27, 2012

GNSS Hotspots | May 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. GROWTH SPURT
California/Nevada, USA
√ The age of the Sierra Nevada mountains — home of Yosemite Valley and Lake Tahoe — is puzzling to geodesists. Integrating GPS and inSAR, Universities of Nevada and Glasgow teams studied the area’s uplift and found that it is growing by 1 to 2 millimeters per year. The verdict? The entire range could have arisen in less than 3 million years.

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By Inside GNSS
IP Rights and Wrongs

IP Rights and Wrongs

As Desi Arnaz often said to Lucille Ball during an “I Love Lucy” episode on TV, “You’ve got some ’splaining to do.”

I refer, of course, to the untoward and unexpected initiative by the British Ministry of Defense (MoD) to patent the technical innovations that underlie the planned next generation of civil GNSS signals.

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By Dee Ann Divis
Stanford and Aalborg Announce Summer Workshop on GNSS Positioning for the Future
May 26, 2012

Stanford and Aalborg Announce Summer Workshop on GNSS Positioning for the Future

A number of GNSS experts from the United States, Denmark, Norway and China will lead a weeklong workshop on the future of satellite-based positioning technologies from August 27 through September 2 at the Slettestrand Holiday Center in North Jutland, Denmark.

The topics range from GNSS basics and Intelligent Transportation Systems to new GNSSes, new receivers and indoor navigation as well as environmental monitoring and arctic navigation. The event is organized by Stanford and Aalborg universities.

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By Inside GNSS
Demystifying GLONASS Inter-Frequency Carrier Phase Biases

Demystifying GLONASS Inter-Frequency Carrier Phase Biases

EQUATIONS 1 -11

GLONASS currently uses a frequency division multiple access (FDMA) technique to distinguish the signals coming from different satellites in the Russian GNSS constellation. The GLONASS L1 and L2 bands are divided into 14 sub-bands, and each satellite transmits in one of these.

The sub-bands are identified by frequency numbers k, from -7 to 6. The GLONASS L1 and L2 carrier frequencies, in hertz, at a frequency number k are defined by:

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By Inside GNSS
How do GNSS-derived heights differ from other height systems?
May 24, 2012

How do GNSS-derived heights differ from other height systems?

FIGURE 2: Example of a national geoid (upper diagram) and a correction surface for the transformation from the new orthometric height system to the old height system (lower diagram). Country is Switzerland. Geoid undulations range from 45 to 55 meters in ETRS89 and from -5 to +5 meters in the national System CH1903+. Lower diagram: Correction surface to transform from the new orthometric height system (LHN95) to the old height system LN02 with corrections from -0.10 to 0.55 meters.

Q: How do GNSS-derived heights differ from other height systems?

A: Height estimation using GNSS always seems to be trickier than horizontal coordinate estimation.

Why?

On the one hand, the GNSS technique has error sources that are more critical in the vertical direction. Height estimates are weaker because of a combination of satellite geometry, the presence of strong correlations to other parameters, such as atmospheric delays, and the antenna phase center model applied during data analysis.

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By Inside GNSS
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