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| Steep-Slope Monitoring
| Although GPS is an efficient tool for deformation monitoring, it also is an expensive one for large projects. The authors developed a remote-controlled monitoring system using an electronic switching device for multiple antennas to monitor steep slopes at the Xiaowan hydropower station in China. | | | LiDAR on the Level in Afghanistan
| | Concerns about airspace security in Afghanistan literally brought a LiDAR-based survey operation down to the ground. | | | Pacify the Power
| | A control system uses GPS to timetag with microsecond accuracy voltage and current measurements throughout a large-area power grid. | | | Millimeters in Motion
| | Brazilian researchers devised a way to detect dynamic millimetric displacements in large structures using single-frequency GPS receivers. They combine interferometry, satellite geometry, and a novel analysis of L1 double-difference phase residuals of regular static observations over a short baseline. | | | GPS & Structural Monitoring
| | Researchers have monitored Koyna Dam for four years, conducting structural and crustal deformation studies using GPS. | | | Just Keep Rolling a Lawn
| | You might not know it from your own backyard performance, but mowing a lawn accurately and precisely constitutes a difficult systems problem, requiring
centimeter-level accuracy and precision control for straight lines and smooth turns. | | | To All the Ships at Sea
| | EGNOS serves as part of a system to track ocean-going vessels automatically over a large region. | | | Precise Rail Track Surveying
| | Describes a multisensor measurement system incorporating real-time kinematic (RTK) GPS, and its use to survey sections of railroad track in the United Kingdom. | | | Picture This World
| | Artists from Switzerland, Liechtenstein, Austria, and Finland used GPS to create and document giant works on a terrestrial canvas. | |  MORE ARTICLES
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| Business Outlook — RTK Crops Up in Precision Ag
| | Most precision agriculture users have settled for 1-meter accuracy using GPS, made possible with the reliable and convenient corrections provided by WAAS (Wide Area Augmentation System). GPS/GNSS is important to key areas in agriculture, including field mapping, yield mapping, and guidance. | | | The Business — Near-Space Location Boost
| | For the past four years, Arizona-based Space Data has used classic weather balloons and a GPS-based navigation system to maintain a constellation of balloons across the southwest U.S. Its SkySite communications network enables its customers, oil and gas companies, to be aware of any developing corrosion, the primary cause of pipeline failures. | | | The Business — Navigation No Bit Player at CeBIT
| | Navigation No Bit Player at CeBIT; Lawyers, Investors in League Against Industry Leader; Leica Unveils Quad-Constellation Antenna; Booming Ag Market Grows Hemisphere Revenues; more | | | Business Outlook — UWB Location Tech on a Roll
| | Ultra-wideband location applications envisioned or already created support emergency services, asset tracking, and manufacturing inventory management. | | | Business Outlook — Get the Picture?
| | Recent achievements of GPS receiver manufacturers such as Air Semiconductors, SiRF, Qualcomm, u-blox, Glonav, and Geotate (NXP Software?s spin-off) are finally paving the way for intelligent integration of GPS in digital cameras. | | | The Business — JAVAD GNSS Unveils Survey Products
| | JAVAD GNSS Unveils Survey Products; California Highway Tests Showcase Traffic Solution; SiRF Unveils New Multimedia Platform, Deals with Stock Drop; Marines Pick Rockwell Collins for Sky-Diving Nav | | | The Business — UPS First to Use ADS-B
| | UPS First to Use ADS-B; Solar Cycle Could Disrupt GPS, Communications; Trimble Acquires Crain Enterprises; Russia Sells GPS-GLONASS PND; more | | | The Business — u-Nav Latest GPS Chip Company Acquired
| | u-Nav Latest to be Acquired; Hemisphere GPS Harvests Steer-by-Wire Company; Hexagon Closes on NovAtel Acquisition; L-3 Lands $33 Million Air Force Contract Extension; more | | | Perspectives — December 2007
| The Year of the Who
GNSS is such a technical subject that it's easy to get caught up in the research and new technologies being brought to the survey/construction market. GPS, GLONASS, Galileo, QZSS, Compass, SBAS, NDGPS, etc. are subjects one could write hundreds of pages about, not to mention a 1,000-word e-newsletter. | | | MORE ARTICLES
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| A Single-Chip GPS Receiver
| | As GPS chip volumes per manufacturer reach millions for the automotive market and tens of millions for consumer GPS, the market map for a single-chip GPS changes considerably. The advent of Galileo will bring out the full benefits of sensitivity, creating an opportunity for low-cost, high-integration one-chip solutions. | | | Time-Invariant Sea-Floor Depths
| | A GPS survey combined with acoustic soundings can determine highly accurate sea-floor depths. Using the ellipsoid as the zero-reference surface then allows navigators, while underway, to determine both keel and overhead obstruction clearance independent of the stage of the tide and the draft of the ship and freeboard. | | | More Bang, Less Buck
| | A new naval stand-off combat capability demonstrates precision-guidance of long-range, gun-fired projectiles in support of ground maneuver warfare. | | | Galileo Test User Segment
| | This article summarizes the first development results of the Galileo system's Test User Segment, including performance tests. | | | Abreast of the Waves
| | A commercial-grade GPS receiver on a buoy measures wave height and direction with centimeter accuracy. | | | Getting to M
| | A team with expertise in systems engineering, digital signal processing, and IC design took on the challenge of developing a prototype IC for direct acquisition of the new M-code signal. | | | The Enemy Inside
| | To utilize signals transmitted through or reflected off walls,
indoor GPS receivers require sensitivities 20dB below that of older,
conventional receivers. At these levels, jamming may come from
low-power sources in the room, in the equipment, or in the chipset
itself. The authors address these inside sources arising from
co-location of antenna, baseband, and host electronics producing
emissions that readily exceed interference levels, and they
offer some design considerations for indoor locatability. | | | Bird's-Eye View
| | Tiny, fast, and cheap, new micro aerial vehicles (MAVs) use GPS for navigation and guidance in civil and military surveillance missions. The bird-sized craft carry a sensor suite including a miniaturized video camera, and can fly indoors as well as outdoors. | | | HIGAPS
| | A large-scale integrated combined Galileo/GPS receiver chipset for consumer applications focuses on high-sensitivity acquisition. | | | MORE ARTICLES
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| 50+ Leaders to Watch
| | Who will move the industry and its applications forward in 2008 and 2009? What strategies will they employ and what risks will they undertake? In this special report, we look ahead to identify key indivduals shaping the future of positioning, navigation, and timing (PNT). | | | Navigating These Mean Streets
| | DARPA's upcoming Urban Challenge will showcase capabilities for effective real-time mapping by robotic vehicles requiring sophisticated sensing capabilities to cope with the object-rich urban setting, where moving objects will also be present. | | | Finders Keepers
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| The ultimate winners appear to be the Internet and software players. The key to success remains content and the software that delivers it. | | | 50+ Leaders to Watch
| | Who will move the GNSS industry and technology forward into 2007 and 2008? What are their goals, and what strategies will they employ? | | | Meet GIOVE-A
| | Galileo satellites must operate in a harsh environment more than 20,000 kilometers above the Earth, through the intense Van Allen electron belt. Key team members describe the design, manufacture, launch, and commissioning of the demonstration satellite GIOVE-A. | | | Lost and Found
| | Want to know exactly where you stand in the world? The next generation of global navigation satellite technology will help you with pinpoint accuracy. | | | Piercing the Veil: Tests of a Flexible Pseudolite-Based Navigation System
| | A pseudolite system developed for the U.S. Army uses signals of opportunity to enable high-precision navigation in regions of GPS denial. The embedded flexible, software-controlled architecture enables the system to reconfigure itself to meet diverse threat scenarios. The system can also cope with signal obstruction for civil users — including first responders — in urban canyons. | | | Ready to Receive: Developing a Professional Antenna for Galileo
| | Can a multi-band antenna cover all the carriers necessary in a modern GNSS, or does the advent of Galileo demand a true wideband technology? The mechanical and resultant electrical symmetry of such a combined GPS+Galileo antenna must provide the phase-center stability with direction of signal arrival necessary for geodetic grade performance. The authors discuss the relative merits of different technologies and offer a detailed analysis of their candidate antenna design. | | | GNSS Accuracy: Lies, Damn Lies, and Statistics
| | This update to a seminal article first published here in 1998 explains how statistical methods can create many different position accuracy measures. As the driving forces of positioning and navigation change from survey and precision guidance to location-based services, E911, and so on, some accuracy measures have fallen out of common usage, while others have blossomed. The analysis changes further when the constellation expands to ombinations of GPS, SBAS, Galileo, and GLONASS. Software scripts, provided online, help bridge the gap between theory and reality. | | | MORE ARTICLES
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| Expert Advice — Do We Have Data?
| | It seems that every week a new and usually glowing market report appears on GPS. As a marketing professional, I naturally take a keen interest in the data that can be gleaned therein. Such reports are an essential source of information for both industry participants and investors. | | | Out in Front — Re-Up for Leaders
| | me of little faith. I had thought, after concluding this month?s 50+ Leaders to Watch article, to quietly wrap it up and put it away on the shelf. Not to be continued next year. We?ve had a three-year run, and it?s been a good one. But how many leaders can there be, worthy of watching? You get to 150+, you feel a bit long in the tooth. But the GNSS community carries much more breadth, depth, enthusiasm, and creativity than I had grokked, even after eight years of covering nearly every aspect of it. | | | Expert Advice — Prepare for GIOVE-B Liftoff
| | A at the end of this month, on the 27th of April, Europe will add a new cornerstone to the Galileo programme and to global satellite navigation as a whole. GIOVE-B, the second Galileo In-Orbit Validation Element (GIOVE) satellite, will rise into a medium-Earth orbit aboard a Soyuz launcher from the Baikonur cosmodrome in Kazakhstan. | | | Leadership Talks — Anomaly Response
| | Don Jewell, contributing editor for GPS World's military and government section, interviewed Col. Mark Crews (pictured above), chief engineer at the GPS Wing, U.S. Space Missile Command, regarding GPS anomalies that occurred in October 2007 that resulted in a great deal of concern in the international user and monitoring community. | | | Out in Front — Hit the Road, Jack
| | We may have neglected those other great mechanical metaphors of our times, the automobile and the delivery truck. We may hardly ever think about the defining institution of our age, the highway — and just how GPS-enabled all those rolling boxes and sprawling concrete ribbons could be. | | | Leadership Talks — High Precision at a New Level
| | Javad Ashjee, chief executive officer of JAVAD GNSS, discusses his company's goals, new market opportunities, and GLONASS, Galileo, and GPS. | |
| Out in Front — Leap of Faith
| | The high priesthood of the Galileo program lashed on the believers attending the Munich Satellite Navigation Summit with the amen verse of "Galileo is back on track," admonishing them to keep the faith and to put that faith into good works. These good works amount to building the applications and the user equipment well in advance. | | | Expert Advice — GLONASS Business Prospects
| | Similar in many aspects to GPS, GLONASS has performed much less successfully on a commercial scale, failing — so far — to create significant business worldwide. Today, however, the commercialization of GLONASS has taken a new and more promising direction, receiving strong encouragement from the Russian government. We look forward to GLONASS being completely restored to its full operational capabilities within the next few years, and we are certain that this time GLONASS will create successful business opportunities worldwide. | | | Out in Front — New Hand at the Helm
| | You might think it's easy standing up here all the time, spouting off out in front and editing and such. It's not. It's not easy. What makes it considerably less difficult is the broadbased and unstinting support that the editorial staff receives from the business office. Headed by, it can now be said, publisher Kristina Panter. | | | MORE ARTICLES
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| Trimble Rolls Out Latest GIS Handhelds
| | Trimble today introduced its latest rugged handheld computing devices with integrated GPS, the GeoExplorer 2008 series, featuring varying levels of accuracy per model. | | | TomTom-Tele Atlas Deal Receives EU Approval
| | After a six-month review by European antitrust officials, Netherlands-based TomTom received unconditional approval today to proceed with its €2.9 billion ($4.5 billion) acquisition of digital mapmaker Tele Atlas. | | | GPS III: All That Remains is the Official Word
| | With rumors swirling about which company got the contract, the Wall Street Journal identifying the supposed contractor, and a Department of Defense under secretary having signed off, all that remains is for the U.S. Air Force to tell which company will build the first GPS III satellites. | | | Where 2.0: Cell Bridge, Poly9 Partner for GeoAlert 2.0
| | Cell Bridge Communications Corp. and Poly9 Group Inc. have partnered to launch GeoAlert 2.0, an emergency broadcasting and mapping application that enables users to monitor real-time risk activity and receive instantaneous alerts on all emergency situations, according to the company. | | | ABI: GPS Handset Market Poised for Huge Expansion
| | The market for GPS-enabled handsets is set to boom over the next four years, with more than 550 million units shipping in 2012, market research firm ABI Research said today. | | | GIOVE-B to Ground Control: Do You Read?
| | Yes we do, says the European Space Agency (ESA). Following its April 27 launch, GIOVE- B, the second Galileo satellite, began transmitting navigation data on May 7, the ESA reported. | | | KVH, NovAtel Integrate GPS, Fiber Optic Gyros
| | KVH Industries Inc. and manufacturer NovAtel Inc. today unveiled KVH's CNS-5000, a self-contained navigation system that combines fiber optic gyro (FOG)-based inertial measurement technology from KVH with GPS from NovAtel. | | |
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