Mobile Broadcom Gets Into the GPS Chip Biz Published June 12, 2007 By GPS World Staff Join the Discussion Communications chip maker Broadcom Corp. today said it was acquiring GPS chip maker Global Locate Inc., a privately-held provider of GPS and assisted GPS (A-GPS) chips and software. Read more » acquisition Broadcom Global Locate GPS chipset mergers and acquisitions personal navigation
Survey MetaCarta to Provide the Oil and Gas Industry with Geographically Relevant Data Published June 11, 2007 By GPS World Staff Join the Discussion MetaCarta, Inc., has announced an agreement with IHS Inc., a global provider of critical technical information, decision-support tools, and related services, to enhance MetaCarta's Energy Geographic Data Module to provide information when searching for energy-related information specific to a location. Read more » construction GIS maps oil and gas pipeline surveying
Spirent Intros Customizable Software for GPS Test, Simulation Published June 1, 2007 By GPS World Staff Join the Discussion Navigation and positioning test system supplier Spirent Communications this week introduced a software suite for the STR4500 GPS simulator, enabling users to generate their own test cases based on motion data that fits their specific requirements, the company said. Read more » GNSS simulator OEM simulator Spirent
Antennas Antenna-Induced Biases in GNSS Receivers Published May 17, 2007 By GPS World Staff By Inder Jeet Gupta It is well known that the phase center of a GNSS antenna can vary with the satellite direction. This phase center movement leads to aspect dependent carrier phase and code phase biases in the satellite signal. For precise geo-location, one needs to characterize the antenna-induced carrier and code phase biases over […] Read more » antenna technology GNSS antennas GNSS receiver OEM receiver design signal processing Tech Talk
Opinions Survey Survey Perspectives – May 2007 Published May 17, 2007 By Eric Gakstatter Join the Discussion Whether you live in London, Lagos, Lisbon, or Los Angeles, when you are looking to buy a survey instrument, most likely you have a preferred instrument distributor in mind. Maybe it´s the local Topcon dealer. Perhaps your Leica dealer has served you well. Or you might prefer the Trimble dealer in your area. All of the manufacturers have distributors signed up around the world. Some operate on a regional basis, serving several countries, while others serve one specific country. I raise this point because of recent, significant changes in the U.S. distribution of survey instruments. Read more » Survey Scene
Defense GPS Insights: Looking Aft, Looking Fore Published May 8, 2007 By Don Jewell Join the Discussion Over-the-air television transmitters are located on large Earthbound transmission towers that typically put out a lot of wattage and hence signal strength over a 50- to 100-mile radius. Sounds a lot like a super-sized pseudolite to me. Now this new idea starts to sound a little more plausible, doesn?t it? Read more »
Defense Boeing Can Mix GPS with Iridium Published April 27, 2007 By GPS World Staff Join the Discussion The Boeing Co. announced concepts for combining the GPS network with the Iridium low-earth orbit telecommunication network to improve accuracy, and signal acquisition in urban environments. Boeing executives delivered the briefing at the National Space Symposium for Pentagon and industry officials. There is no firm plan to turn it into a fielded system, however. Read more » Boeing iGPS Iridium
BeiDou GNSS New Beidou Satellite Launched Published April 27, 2007 By GPS World Staff Join the Discussion China launched its 5th Beidou/Compass navigation satellite on Friday, 13 April 2007 (UTC). The initial orbital elements (inclination = 55.0?, eccentricity = 0.62, mean motion = 3.84 orbits per day) may indicate that this is not another GEO satellite but rather the first of the MEO satellites. Read more » satellite launch
Transportation EGNOS Performs Well in Flight Trials Published April 27, 2007 By GPS World Staff Join the Discussion The European Geostationary Navigation Overlay Service (EGNOS) recently passed flight trials in Limoges, France with flying colors, according to the European Space Agency (ESA). Read more » aviation EGNOS European Space Agency
GNSS Solar Burst Impacts GPS Published April 27, 2007 By Richard B. Langley Join the Discussion On December 6 last year, the sun emitted a burst of radio energy that impacted the performance of GPS receivers all over the sunlit side of the Earth. That the sun produces radio emissions is not surprising. What is surprising is that on this day they were extremely powerful. Read more » mitigation modernization solar flare WAAS