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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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| The Business: Two 'Smallest Ever' Modules Released
| | Two ?Smallest Ever? Modules Released; Trade Commission to Review SiRF/Broadcom Ruling; Motorola Rolls Out In-Vehicle Computer; Northrop Grumman Gets U.S., Euro Aviation Approval | | | Business Outlook: Precision Market to Reach $8B by 2012
| | The global value of precision GNSS products and services is approximately $3 billion today, and will grow to between $6 billion and $8 billion by 2012, according to a market research report I co-authored with Rob Lorimer of Position One Consulting Pty. Ltd. | | | The Business: Savannah ION Showcases Promising New Products
| | Savannah ION Showcases New Products. PLUS: NovAtel; Trimble; Fastrax; Hemisphere GPS; Spirent Communications; Magellan; u-blox's Amy | | | Business Outlook: Go Green with GPS
| | Let's think about the planet for a second. In the turmoil of high gas prices and rising costs, GPS and location-based services continue to quietly provide us with a combination of savings and planet-regenerating benefits. | | | The Business: Contractors Chafe at Galileo Process, Chided to Comply
| | Two of Galileo?s prime contractors urged the European Commission (EC) to accelerate procurement of the satellite navigation system or face what might become politically unacceptable delays in starting the service. PLUS: Indra Leads Team Tasked with Updating EGNOS; Timing Right for Brilliant Agreement with NovAtel; Boeing Awarded Enhancement | | | Business Outlook: The Case for GPS, FM, Bluetooth Integration
| | As the technologies approach 100-percent attach rates and major equipment manufacturers move forward with plans for aggressive propagation, it becomes increasingly viable for these three radios to be integrated into cellular basebands. | | | The Business: Broadcom Top, but Does Not Locate iPhone
| | Market research firm ABI Research ranked Broadcom at the top of its GPS vendor matrix analysis (see list), noting that Broadcom's Global Locate unit had the contract to supply the GPS silicon in the second-generation Apple iPhone. However, reputable sources now indicate that German chipmaker Infineon supplies the GPS chip for iPhone 3G, though Broadcom has non-GPS parts in it. PLUS: Moto Survey; Ceva, u-blox Settle License Dispute; Rakon Embarks on JV with China?s Timemaker Crystal; more | | | Business Outlook: Touchscreens Open New Windows
| | New waves of touchscreen technology, fomented by the recent introduction of Apple?s iPhone, are making their way to the consumer GPS market. | | | The Business — Apple's Newest iPhone Offers Assisted GPS
| | GPS will be a feature on the much-anticipated next-gen iPhone, according to information the company released during its WorldWide Developers Conference June?9. Plus: GPS Chipmakers Headed for More Consolidation?; JAVAD GNSS Hosts First User Conference; Patent Ruling for Broadcom, Against SiRF; NavCom Software Updated; more | | | 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
| | 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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| Out in Front: More Satellites! More Signals!
| | When washing dishes one evening, it suddenly occurred to me that I could run my own election, play the political puppetmaster as it were — this, this was truly exciting. And so was born GNSS Election '08, the basis for discussion at this year's Leadership Dinner, held during ION-GNSS in Savannah, Georgia. | | | Leadership Talks: GNSS Election '08
| | GPS World's Leadership Dinner convoked a lively debate: Would the community gain more from new signals, or from more satellites? A made-up scenario that elicited important insights. | | | Expert Advice: Interoperability, from Signals to Integrity
| | For the user to combine systems using interoperable integrity mechanisms, the integrity information received from each of the systems must be based on the same concepts and definitions. There is a risk of having different receiver standards at regional level, and the lack of an agreed GNSS baseline on integrity could delay the ongoing transition to GNSS in aviation. Thus, reinforcing international cooperation to agree on a common base integrity mechanism will take a step towards interoperability and improved performance under a multi-constellation architecture. | | | Leadership Talks: View from China
| | Guifeng Jing (GJ) wrote in our May issue that ?I plan to do some research work on the establishment of integrated system of systems for users in China, to help domestic providers of digital maps, regional and thematic service systems, and service operators to sit together and discuss the possibility of setting up an interoperable system." | | | Out in Front: Eyes on the Prize
| | Last month with the help of four engineers we identified reasons for the problem. Now, aided by a newly appointed professor at Brazil?s top technical university, the head of an international GNSS service, and the director of a labor organizing institute, we attempt to outline a solution. | | | Expert Advice: Turning from Challenge to GNSS Opportunity
| | After a brief Galileo snapshot of current status, I will proceed as requested with predictions of life in a multiple-GNSS world. We have secured an additional budget of 3.4 billion euros, mainly for developing and launching the Galileo constellation, with the key objective of a full operational capability in 2013. | | | Out in Front: Missing X Chromosome
| | "When young women make career choices, they are very interested in contributions to make the world a better place," says Elizabeth Cannon, dean of University of Calgary's Schulich School of Engineering, and past chair of ION's Satellite Division. "This is clear in service professions (teaching, health) and is there in engineering, but we often don't do a good enough job showcasing this. GNSS has great relevance; just look at all of its applications that are having major impacts on society." | | | Expert Advice: Reference Frame for Africa
| | The Africa Reference Frame (AFREF) is an initiative to unify the many national coordinate reference systems in Africa using GNSS and in particular GPS as the primary tool. | | | Expert Advice: Can We Blog?
| | Need help now? Wonder what the difference is between software radio, software-defined radio, and software receivers? Want to know how far you can go from the base station in your next stop-and-go kinematic survey to assure centimeter-level accuracy, or what relative and absolute antenna calibration parameters are, or how ?geocentric? are the geocentric coordinates? Struggling with that pesky multipath or cycle slips, or need some affordable augmentation in GPS-challenged environment, since last time you lost half your kinematic data due to losses of lock? | | | MORE ARTICLES
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| GigaFly GPS-Guided 'Chute Passes Test, Sets Record
| | Airborne Systems completed a test drop deploying a 40,000-pound payload under a single, GPS-guided ram-air parachute, surpassing the previous payload record of 33,000 pounds set in September, according to the company. | | | Sagem Orga, Blue Sky Positioning Debut A-GPS SIM Card
| | Smart card maker Sagem Orga has embarked on a strategic partnership with BlueSky Positioning to integrate assisted-GPS (A-GPS) positioning technology on SIM cards for mobile phones. | | | Boeing Upgrades GPS OCS in Anticipation of IIF
| | Boeing says it will add improved capabilities to its technology for the U.S. Air Force's Operational Control Segment (OCS) satellite ground-control system for the GPS. | | | GNSS Use in the Year 2028
| | On November 18 GPS World's Alan Cameron will look at the daily life of an average citizen in the year 2028, with a fully developed, interoperative GNSS combined with laser scanning, INS, Loran, TV, Wi-Fi, UWB, Bluetooth, and more signals. | | | Qualcomm Licenses Skyhook's Wi-Fi Positioning Tech
| | Chipmaker Qualcomm Inc. has licensed Skyhook's Wi-Fi positioning technology to use in its gpsOne, its GPS-based positioning platform, for hybrid location positioning. |
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