GPS World

The Business and Technology of Global Navigation and Positioning

Leadership Talks – Signaling a Shakeup

Published August 1, 2007 By Tracy Cozzens Join the Discussion

Ken Hudnut (KH), U.S. Geological Survey geophysicist and leader of the Southern San Andreas Fault Evaluation (SoSAFE) Project, spoke with Managing Editor Tracy Cozzens (TC) on June 28.

Integer ambiguity validation: Still an open problem?

Published July 30, 2007 By GPS World Staff

By Sandra Verhagen High-precision Global Navigation Satellite System (GNSS) positioning results are obtained with carrier phase measurements, once the integer cycle ambiguities have been successfully resolved. The position solution is obtained in four steps: 1. Float solution:least-squares, discarding integer nature. 2. Integer solution: real-valued float ambiguities mapped to integer-valued ambiguities.Examples of integer estimators (Teunissen, 1998a): […]

algorithms and methods GNSS integer ambiguity OEM Tech Talk

Opinions Survey

Survey Perspectives – July 2007

Published July 30, 2007 By Eric Gakstatter Join the Discussion

The European Geostationary Navigation Overlay Service (EGNOS) is Europe´s version of the U.S. Wide Area Augmentation System (WAAS) with essentially the same mission. It offers GPS users in Europe more accurate and reliably GPS positioning. Like WAAS, EGNOS focuses on improving the integrity and accuracy of autonomous GPS positioning primarily by modeling refraction caused by the ionosphere. Also, EGNOS was designed to be compatible with WAAS so your WAAS-enabled receiver will work with EGNOS just fine.

Broadcom Completes Acquisition of Global Locate

Published July 13, 2007 By GPS World Staff Join the Discussion

Telecom chip maker Broadcom Corp. said Thursday evening that it had completed its acquisition of Global Locate Inc., a privately held provider of GPS and assisted-GPS chips and related software.

Broadcom Global Locate mobile device personal navigation tracking

Rockwell Collins Taps Spirent for GPS Wing Contract

Published July 2, 2007 By GPS World Staff Join the Discussion

Spirent Federal Systems Inc. said today that Rockwell Collins has selected Spirent Federal to supply multiple GPS simulators to support the Modernized User Equipment (MUE) Receiver Card Development contract it has with the GPS Wing.

GPS Wing Rockwell Collins Spirent

USGIF Accepting 2007 Awards Program Nominations

Published June 28, 2007 By GPS World Staff Join the Discussion

The United States Geospatial Intelligence Foundation (USGIF) is reminding colleagues in academia, industry, and the defense and intelligence communities that October 1 is the deadline to submit nominations for the 2007 USGIF Awards Program.

defense GIS military

Opinions Survey

Survey Perspectives – June 2007

Published June 27, 2007 By Eric Gakstatter Join the Discussion

It´s been about a year since I´ve touched on WAAS (Wide Area Augmentation System) with any depth, and a lot of things are happening on that front so I´d thought I&acite;d give an update. Also, look for a column on EGNOS (Europe´s version of WAAS) in the next month or two.

GNSS Transportation

NDGPS Gasping

Published June 27, 2007 By GPS World Staff Join the Discussion

RITA and the Coast Guard have a tough job ahead. Between them, the Department of Transportation´s (DOT´s) Research and Innovative Technology Administration and the multi-mission maritime service are trying to save a national differential GPS (NDGPS) program that faces termination next year.

nationwide differential GPS NDGPS

GMV Buys Controlling Interest in Masisconvi

Published June 13, 2007 By GPS World Staff Join the Discussion

Spanish technology conglomerate GMV has purchased a 66 percent controlling interest in Masisconvi S.A., another Spanish company that specializes in design and manufacture of electronic fare-collection systems.

acquisition GMV mergers and acquisitions

Honeywell Real-Time Locator for Manufacturing

Published June 12, 2007 By GPS World Staff Join the Discussion

Honeywell this week introduced its Honeywell Instant Location System (HILS), a real-time asset management application that integrates a number of technologies, such as Ultra-Wideband, GPS, Wi Fi and RFID, with Honeywell´s process automation system, Experion Process Knowledge System.

asset management HILS Honeywell tracking