Inside GNSS: Engineering Solutions from the Global Navigation Satellite System Community
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Inside GNSS • May/June 2006

GNSS Album: Images and Spectral Signatures of the New GNSS Signals

Until now, civilian global satellite navigation systems (GNSS) receivers have had essentially only one signal, the GPS L1 C/A-code, reliably available for navigation. However, in the coming years, many more operational GNSS signals, systems, and frequencies will become available to civilian users.

GNSS Solutions • May/June 2008

What about WAAS Functions and Differential Biases?

Q: Do GNSS augmentation systems certified for aviation use, such as the GPS Wide Area Augmentation System (WAAS), have a function other than improving the accuracy of user navigation?

A: The short answer is yes.

Inside GNSS • May/June 2008

Preserving A Legacy

The U.S. Navy’s Ship Transfer program helps satisfy U.S. foreign policy objectives and the defense requirements of allied and friendly nations by fostering interoperability among military vessels and on-board systems, which helps strengthen mutual defense arrangements among these nations.

Under the Foreign Military Sales (FMS) Program the United States offers retired U.S. Navy and U.S. Coast Guard vessels to these nations’ military services. Export controls require that the vessels be sanitized of classified and sensitive material prior to the transfer.

Thinking Aloud • May/June 2008

Limits of Imagination

The use of GPS (or GNSS) is only limited by our imaginations.

How many times have you heard that since someone — probably Charlie Trimble — first coined the phrase back at the dawn of space-based PNT civilization? Often enough that it runs the risk of passing from mantra into truism and, ultimately, cliché.

But is that a predictive statement about human imagination or merely descriptive?

June 9, 2008

Faulty Booster Component May Delay IIR-M Launches; L5 Signal Ready to Go

Suspected faulty components in a Delta II rocket are delaying the launch of the final two modernized GPS Block IIR satellites, possibly preventing the early broadcast of an L5 civil signal that faces a 2009 deadline for being on the air.

According to Air Force officials at the GPS Master Control Station, Schriever Air Force Base, Colorado, and Patrick AFB near the Cape Canaveral launch site, the questionable component is the 40-second timer that triggers separation of the third stage booster from the GPS space vehicle. Affected are both the 20th Block IIR-M, which had been scheduled to launch this month with a civil L5 test signal enabled in the navigation payload, and GPS IIR-21.

June 3, 2008

SkyTraq Single-Chip OEM GPS

Taiwanese fabless GNSS manufacturer SkyTraq Technology, Inc., has announced a one-square-centimeter GPS OEM receiver, the Venus634LP.

The L1 GPS C/A-code, receiver includes 51 acquisition channels and 14 tracking channels and is also capable of processing satellite-based augmentation system (SBAS) signals. Measuring 10 x 10 x 1.2 millimeters, the Venus634LP integrates LNA, SAW filter, RF front-end, GPS baseband, 0.5ppm TCXO, RTC crystal, LDO regulator, and passive components in an LGA44 package with 0.8 pitch.

May 25, 2008

Xsens Offers SW/HW Upgrades for AHRS/GPS Products

Xsens Technologies B.V. has announced the release of a new version of the MT Software Development Kit (SDK) and new firmware for all of the Enschede, The Netherlands¬based company’s inertial motion trackers: MTi, MTi-G and MTx.

The software and firmware contain predefined settings for optimized orientation output in several specific application areas. Applications relying on data output for orientation, stabilization, or navigation will benefit.

New Builds • May 26, 2008

Fastrax Announces Software GPS Technology

Finland’s Fastrax oy, which introduced a new generation of OEM GPS receivers earlier this year, has added a software receiver to its line-up.

Based on the Fastrax’s iSuite3 embedded software architecture used in the company’s iTrax03, and iTrax130) series of GPS receivers, the software receiver is designed for easy porting to a portable device’s central processing unit (CPU).

May 16, 2008

Lockheed Martin Wins GPS IIIA Contract

A team led by Lockheed Martin Space Systems Company has won U. S. Air Force approval to build the GPS Block IIIA satellites under a contract valued at up to $3.568 billion.

The long-delayed decision was announced May 15. The acquisition covers the first of three sets of Block III satellites currently scheduled to begin launching in 2014.

People • May 15, 2008

Overlook Names New President

Douglas S. Taggart has been named president of Overlook Systems Technologies, Inc., effective June 1, 2008.

A professional engineering and technical services firm headquartered in Vienna, Virginia, Overlook has extensive experience in GPS and Positioning, Navigation and Timing (PNT) technologies, operations ,and applications, as well as electronic warfare, space and information operations, and space control.

Jammer Dectector
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