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| Shaping Aviation Integrity
| Relative RAIM and absolute RAIM both enable an aircraft to raise a flag within seconds of receiving faulty data. This article evaluates the protection-level equations for both methods, and examines them in the light of GNSS constellations optimized for 24, 27, and 30 satellites. | | | Innovation: Good, Better, Best
| | While WAAS was already a much-valued addition to standalone GPS, significant improvements were made to WAAS over the past three years, including expansion of the reference station network and the commissioning of two new GEOs. 2008 will see even more enhancements. In this month's column, we take a look at WAAS's recent upgrades and take a peek into its future. | | | Approach with Precision
| | New ground-based augmentation systems at or near airports offer the potential of new or improved capabilities, as well as cost reduction for existing airspace system infrastructure. The authors tested a prototype using a multimode GPS receiver that converts differentially corrected signals to the airplane's instrument system, enabling more precise autolandings. | | | Troubleshoot Before Takeoff
| | Modeling and simulation, two separate but related activities conducted prior to flight tests of high-performance military navigation systems, can reduce costs, shorten timelines, and remove some uncontrollable variables from the process, to deliver more accurate, verifiable results. | | | EGNOS Takes Flight
| | Tests of the European Geostationary Navigation Overlay Service (EGNOS) indicate the system's future capabilities as a navigation aid for the aeronautical community, particularly in approaches to mountain-based airports and other challenging environments. | | | Guided to Gather — Toy Plane Upgraded with Telemetry
| | GPS/INS and infrared optical sensors propel USGS's transformation of a remote-controlled one-quarter–scale recreational aircraft into a low-cost unmanned aerial vehicle designed for environmental particulate collection. | | | Robotic Fighters Coming in on GPS
| | A recent simulated test of military UAVs demonstrated one more envisioned GPS role in military operations. As part of the J-UCAS program, Northrop Grumman performed a test of simulated, simultaneous control of four X-47B UAVs on September 28, 2005, at the Naval Air Warfare Center Weapons Division in China Lake, California. | |  MORE ARTICLES
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| TeleNav Comes Through For Pine Hall Brick
| | TeleNav Inc. customer Pine Hall Brick, a provider of brick and clay pavers, has been able to improve its day-to-day operations, including managing resources, transportation costs, and customer service, through the use of Tele Nav Track, the company's GPS-enabled mobile resource management (MRM) service. | | | Help Wanted! GPS World Unveils Online Career Classifieds
| | GPS World magazine has opened a paid advertising section focusing on job opportunities in the GNSS field. | | | Vehicle Telematics Driving Machine-to-Machine Market
| | Market research firm Berg Insight forecasts that vehicle telematics applications will dominate the machine-to-machine cellular market in most parts of the world and account for more than half of all network connections in 2012. | | | SysLOCATE Debuts Tracker for Buy-Here Pay Here Lots
| | SysLOCATE today launched its S2800 GPS vehicle tracking unit, designed specifically for buy-here pay-here automobile dealers. | | | Contigo Tracking Tech Scores U.S. Patent
| | Asset tracking and fleet management provider Contigo has received a U.S. patent, no. 7,327,258, for its technology for monitoring the movements of mobile items. | | | Trimble Unveils Marine DGPS Station Software
| | Trimble today introduced a modernized software package designed to continuously monitor and control Differential GPS (DGPS) broadcast sites for marine navigation, Trimble Coastal Center software. | | | Celevoke Inc. Acquires Brazil's Crown Telecom Assets
| | Current Technology Corp. and MSGI Security Solutions Inc. today announced Texas-based Current Tech subsidiary Celevoke Inc. has formed Star One Telematica SA to market and sell Celevoke's telematics in Brazil. | | | Remote Dynamics Unveils Portable Asset Tracker
| | Asset tracking and fleet management supplier Remote Dynamics today introduced a portable asset tracker, Redi2go. | | | Celevoke Prepares National Rollout for its Telematics
| | Texas-based telematics startup Celevoke, Inc. has appointed 20th Century Fox Federal Credit Union a distribution channel partner for its telematics products. | |
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| DIRECTIONS 2007: Avionics & Transportation
| | The most important development I see with regards to transportation in the next 10 to 15 years is the reliance of the transportation industry on the use of satellite navigation using the GNSS. This assumes, of course that the GNSS is maintained, expanded, and modernized. | | | MORE ARTICLES
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| Trimble Acquires @Road, Spacient
| | Trimble will acquire @Road, Inc. of Fremont, California for $496 million. This expands Trimble's role in mobile resource management (MRM), formerly known as fleet tracking. | | | Get Me to the Office On Time
| | Transporting thousands of employees around a huge company campus is a challenge for any shuttle-bus system. The 30,000 employees who work at Microsoft's headquarters in Redmond, Washington, often need to attend meetings in buildings on the other side of the five-square-mile campus, which comprises 84 office buildings, parks, playing fields, and a lake. | | | Call Me a Cab
| | Different forms of public transportation — such as railways, buses, and taxis — must be integrated into one public transport system that can provide the same mobility and accessibility as privately owned cars. | | | Sky-Tech Cruisers
| | Solar-powered cars raced 2,500 miles as fans accessed online maps with live position and performance updates. | | | Eyes on the Road
| | Increased productivity realized by trailer-fleet monitoring can offset the cost of installing GPS tracking units. | | | MORE ARTICLES
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| Integrity Hits the Road
| | Low-cost sensors and a Horizontal Trust Level (HTL) enable mobile-terminal applications requiring continuous quality of service in positioning and integrity. | | | Trust Your Receiver?
| | A tamper-resistant receiver can quantify the trust of a location solution and provide cryptographic proof to a remote application. | | | MORE ARTICLES
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| Dear Diary
| | Gathering data on who is traveling where, when, and why is being made possible through the use of the Global Positioning System Automated Travel Diary. | | | MORE ARTICLES
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| DIRECTIONS 2007: Avionics & Transportation
| | The most important development I see with regards to transportation in the next 10 to 15 years is the reliance of the transportation industry on the use of satellite navigation using the GNSS. This assumes, of course that the GNSS is maintained, expanded, and modernized. | | | MORE ARTICLES
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| Navteq Expands Speed Limit Data, Adds Road-Side Warnings
| | Digital map and traffic data supplier Navteq has expanded its data on posted speed limits and launched road-side warnings as part of its content offerings, the company said Tuesday. | | | AT&T Introduces RFID/GPS-Based Tracking for Schools
| | AT&T Inc. today unveiled its interoperable 802.11-based RFID and GPS-based mobile resource management (MRM) applications for the kindergarten through grade 12 (K-12) education market segment. | | | DriveOK Licenses CalAmp Vehicle Tracking Patents
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| CalAmp Corp. has entered into a patent license agreement with DriveOK Inc., a provider of GPS-enabled vehicle tracking solutions, for use of CalAmp?s U.S. patent nos. 6,025,774 and 6,249,217 B1, the company said Monday. | | | BSM Raises Capital with Private Placement of Shares
| | Vehicle tracking technology supplier BSM Technologies Inc. recently completed a private-stock placement, the company said today. | | | DriveOK Introduces Small Fleet GPS Tracker, Service
| | Telematics and fleet management supplier DriveOK Inc. has launched a vehicle tracking unit designed for small fleet owners and parents of driving-age children, the company said today. | | | GEOTrac/Iridium System Netting Canadian Oil-Field Thieves
| | Canadian-based Iridium satellite services reseller GEOTrac International is working with the Royal Canadian Mounted Police (RCMP) to apply advanced GPS, mapping and satellite communications technology to facilitate recovery of stolen vehicles and equipment, the companies said Tuesday. | | | BSM Revenues Grow with SecTrack Acquisition
| | Canadian vehicle tracking and surveillance startup BSM Technologies Inc. reported today that its Q1 revenues leaped 246 percent to $2.1 million compared to the year-ago period. | | | | Ituran Sees Revenues, Subscribers Climb
| | Israeli location-based services and fleet management supplier Ituran Location and Control Ltd. said today that its Q1 revenue jumped 16.2 percent thanks in part to 49,000 new subscribers for its services. | | | Renesas introduces 3rd generation in-car navigation processor
| | Japanese chip maker Renesas Technology´s American subsidiary today unveiled a new processor designed specifically for in-vehicle navigation and entertainment systems. | | | MORE ARTICLES
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| 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. | | | To All the Ships at Sea
| | EGNOS serves as part of a system to track ocean-going vessels automatically over a large region. | | | MORE ARTICLES
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| Safety Afoot
| | A pedestrian alert system can help reduce deaths and injuries caused by vehicle collisions with pedestrians, and could be adapted for bicycle safety, airport-ramp and construction-site pedestrian safety. | | | Innovation: A GNSS Odometer
| | To reduce road-maintenance costs, some administrations are charging per kilometer of travel with data coming from an odometer recording. To fairly implement such schemes, accurate odometers are critical. Could an odometer based on GNSS be a solution? | | | 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. | | | Leadership Talks — Eyes on the Road
| | Chet Huber, president of OnStar, a wholly owned subsidiary of General Motors that provides in-vehicle telematics to five million subscribers, spoke with GPS World on May 7. | |
| Pass/No Pass
| | A new driver assistance system indicates road sections that are unsafe for passing. The advanced navigation system extends the visual horizon to an electronic horizon with a much larger range. | | | Safe in Traffic
| | Integration of GPS and wireless high-speed communications in vehicle-to-vehicle and vehicle-to-roadside links can reduce accident rates and injuries. A sophisticated processor, GPS receiver, and dedicated short-range communications (DSRC) transceiver tap into available sensors that already help to control and maintain vehicle operations. | | | Get Ready, Get Set, Race!
| | Preplanning information about terrain is as important as real-time navigation for achieving peak performance in autonomous driving. Both preplanning and navigation — and key technologies to support them — helped the Carnegie Mellon Red Team successfully guide the robot vehicles Sandstorm and H1ghlander through the 2005 DARPA Grand Challenge course. | | | Driving the Future: Vehicles Draw Data from Roadside, Stoplights
| | Emerging applications in the U.S. Department of Transportation's (DOT's) ambitious Vehicle Infrastructure Integration (VII) initiative include integrations of GPS with Dedicated Short Range Communications (DSRC) and other sensor technologies to improve highway safety and efficiency. | | | Innovation: GPS + LORAN-C
| | Before GPS, even before satellites, there was LOng RAnge Navigation, or LORAN. Using terrestrial radio transmitters, it was developed during World War II for aircraft navigation. The wartime system evolved by the mid-1950s into the present day 100 kHz LORAN-C system. LORAN's standard principle of operation is hyperbolic positioning. A receiver measures the difference in times of arrival of pulses transmitted by a chain of three to six synchronized stations separated by hundreds of kilometers. The time-difference measurement derived from the signals of two stations, when multiplied by the speed of propagation of the signals, forms a line of position (LOP); the receiver could be anywhere on this line and give the same measurement. The geometrical form of this LOP is a hyperbola. Measurements using a third station provide another hyperbola, which intersects the first at the position of the receiver. There are many LORAN chains around the globe. | | | MORE ARTICLES
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