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New Builds • April 27, 2009

Companies Announce GPS/Wi-Fi Collaboration

Ekahau Inc. has announced that its Wi-Fi location tracking software is being integrated into GPS receivers designed by NavSync Ltd. to enable customers to continuously track asset in indoor and outdoor environments.

Wi-Fi–enabled GPS tag combines NavSync’s NavTrac GPS module with Ekahau's location protocol. The NavTrac module incorporates the CW85 16-channel GPS receiver/802.11b/g transmitter combination.

New Builds • April 26, 2009

Loctronix Gains Patent for Its Spectral Compression Positioning, Tracks CDMA, GNSS

[Updated 4/26/09] On March 31, the U.S. Patent Office granted Loctronix Corporation its first patent, which will provide the foundation for its Spectral Compression Positioning (SCP) technology that enables multi-source positioning capability in a single sensor. Subsequently, the company announced that it had successfully achieved meter-level ranging performance using CDMA cellular signals.

Inside GNSS • May/June 2009

Modernization Milestone

At 5 a.m. PDT (Pacific Daylight Time) on April 10, 2009, GNSS reached a new milestone as the first GPS L5 signal was turned on and transmitted from a GPS satellite. Eagerly anticipated, this is the first broadcast of a GPS signal in a frequency band dedicated solely for civilian use.

Inside GNSS • May/June 2009

Synthetic Aperture GPS Signal Processing

For the extended digital edition of this article, please download the pdf using the link above.

Synthetic aperture techniques combine data obtained from multiple sensors — or one sensor moving among multiple locations, or both — to construct a single image. These techniques have been widely researched, developed, and applied in the area of radar systems.

April 20, 2009

Septentrio Receivers Track L5, Other SVN49 Signals

Septentrio reports success in tracking five signals being transmitted from the modernized GPS Block IIR satellite with the L5 demonstration payload launched on March 24.

Now designated space vehicle number 49 (SVN49), the satellite began broadcasting in the L1 and L2 band on March 28, shortly after the spacecraft reached its quasi-circular middle earth sorbit.

April 19, 2009

Congress, U.S. Trade Rep Seek Public Comment on Access to Galileo Markets

Prompted by a congressional footnote in the 2009 Omnibus Appropriations Act signed into law last month, the Office of the U.S. Trade Representative (USTR) is soliciting public comment on American industry’s access to the Galileo program and related markets.

People • April 17, 2009

ATK Hires Former GPS JPO Director Jim Armor

Alliant Techsystems has named Major General U.S. Air Force (Ret.) James B. Armor Jr., a former director of the NAVSTAR GPS Joint Program Office (GPS JPO, now the GPS Wing), as vice-president of strategy and business development for spacecraft systems and engineering services for the company’s Space Systems unit.

Inside GNSS • November/December 2008

GPS Modernization Snapshot: WAAS, L2C, Launch Delays

Although satellite launch delays continue to plague the GPS program, planning and paperwork continue to make solid gains.

The U.S. Air Force announced that it will begin broadcasting a transitional civil navigation (CNAV) message on the GPS L2 civil signal (L2C). The signal is now being transmitted on the six IIR-M satellites in orbit as a dataless sequence without modulation. And, on October 31, 2008 the GPS Wing completed an integrated baseline review (IBR) of the GPS IIIA program.

New Builds • April 15, 2009

Hemisphere Launches Noise-Resistant GPS Antenna

Hemisphere GPS has introduced a new GPS antenna, the A21, designed to reduce the effects of interference from radios, transmitters, and other peripheral electronic equipment.

April 10, 2009

Air Force Secures ITU Filing with GPS L5 Signal Transmission

The GPS IIR-20(M) satellite successfully transmitted for the first time a GPS signal in the L5 frequency band today (April 10), according to the U.S. Air Force operators of the Global Positioning System. L5, the third civil GPS signal, will eventually support safety-of-life applications for aviation and provide improved availability and accuracy to users.

Jammer Dectector
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