GPS Goggle

The Zeal Optics Transcend GPS Goggle enables skiers to monitor their speed and altitude, as well as the time and vertical speed, using the GPS Goggle. The various data are visible on a head-up display. The stats can be downloaded on your computer with a Google Map overlay to review performance. The rechangeable lithion-ion battery allows 7 hours run time. The goggle is PC and Mac compatible and includes European and American adapters and the software allows Imperial and metric units.The goggle itself is polarised and reduces 99% of the glare. The lens is in-molded and anti-fog treated. The frame... (read more)
2010-12-02 01:55:01

Geodetic GPS

Is the moment coming when our GPS product survey will have to be renamed? Any new title should reflect the existence and use of GLONASS receivers, combined GLONASS/GPS receivers and Galileo receivers. But the results of this year’s product survey do not yet give reason for such a step. Healthy and stable competition has emerged over the years among manufacturers of receivers. Satellite signals coming to us from space, GPS next to GLONASS, and in the future Galileo, each have their own characteristics. These make the signals in part complementary to each other. From a technical point of view this... (read more)
2006-01-25 12:00:00 Henk Key and IJsbrand van der Bent, contributing editors, GIM International

GPS Pirates

Modern-day piracy in Somalia
The Gulf of Aden is currently one of the world's most dangerous shipping routes. Pirates originating from Somalia, or rather that part of the country called Puntland, launch frequent attacks on commercial vessels bound for the Suez Canal or the Indian Ocean. Pirates - the word sounds medieval, and their vessels sometimes also resemble classic pirate vessels, including skull-and-crossbones flag. However, don?t be misled; these modern-day pirates use state-of-the-art equipment. Not only do they boast an impressive array of armaments, they also use the latest versions of GNSS, GIS and telecommunication equipment. Vessels passing the Bab al Mandeb between the... (read more)
2009-05-29 12:00:00 Henk Key

Dual GPS

OxTS is releasing a new dual antenna version of the Inertial+ navigation system at this year's Intergeo exhibition. The new Inertial+2 provides improved heading accuracy for better performances in airborne survey and mapping applications.         Being compatible with most GPS receivers on the market, the Inertial+ is very easy to integrate in to a current GPS only solution. Adding the Inertial+ to a GPS receiver will not only provide reliable, continuous position data even during GPS signals blockage but also output measurements like roll, pitch and heading with high accuracy in real-time. Using two GPS receivers in the... (read more)
2009-09-21 11:08:13

GPS Innovation Alliance to Support GPS Importance

Citing the ever-increasing importance of the Global Positioning System (GPS) to the global economy and infrastructure, a group of US-based GPS advocates have announced the formation of the GPS Innovation Alliance, an organisation dedicated to furthering GPS innovation, creativity and entrepreneurship. Members of the Alliance are drawn from a wide variety of fields and businesses reliant on GPS. These include manufacturing, aviation, agriculture, construction, transportation, first responders and surveying and mapping. Still others are organisations representing consumers who depend on GPS for boating and other outdoor activities, and in their automobiles, smartphones and tablets. Headquartered in Washington, D.C., USA, the... (read more)
2013-02-14 03:54:56

Hemisphere GPS Eclipse Dual-Frequency GPS Receiver

Hemisphere GPS (Canada) has introduced its enhanced Eclipse dual-frequency GPS receiver. The Eclipse receiver now supports USB communication and enables data logging to standard external USB flash drives. It also now utilises an expanded number of standard RTK (Real-Time Kinematic) message formats, such as RTCM v3, CMR, and CMR+, making the Eclipse receiver compatible with CORS (Continuously Operating Reference Stations) and other RTK base station networks. The Eclipse receiver also includes the updated library from OmniSTAR, delivering improved acquisition time and performance.   An affordable dual-frequency solution, the Eclipse receiver delivers reliable centimetre-level accuracy by reducing code measurement noise and... (read more)
2008-09-09 11:11:49

Integrating GPS and SAR

Monitoring Coal-field Subsidence
Subsidence of the earth's surface caused by underground mining can be monitored using terrestrial land-survey methods. However, applying these is difficult in hilly terrain and densely forested or urbanised areas. Such difficulties can be overcome with a combination of spaceborne SAR and GPS. InSAR accuracy corresponds to GPS and lies, with 9mm variance, in less than 8% of SAR signal phase.<P> When a point on the earth's surface is subject to deformation such as subsidence, the distance, or slant range, between an orbiting SAR sensor and the point gradually changes over time. Slant range can be determined by measuring the... (read more)
2007-10-16 12:00:00 Hakan Akcin, S. Hakan Kutoglu, Zonguldak Karaelmas University, Turkey and Tomonori Degucci, Earth Remote Sensing Data Analysis Centre, Japan

Iranian Permanent GPS Network

Using GPS to Understand Earthquakes
Lying in one of the most tectonically active zones in the Alpine-Himalayan belt, Iran frequently suffers from heavy and disastrous earthquakes. To monitor surface displacement and measure velocity and strain fields, the National Cartographic Center of Iran (NCC) has established a network of one hundred GPS stations: the Iranian Permanent GPS Network for Geodynamics (IPGN). The authors introduce the design of the new geodetic network. Iran is situated between the Eurasian plate in the north and the Arabian plate in the south, with shortening rate of 2-2.5cm per year. Many earthquakes occur in this area, causing enormous loss of life... (read more)
2006-08-23 12:00:00 Yahya Djamour, Hamid Reza Nankali and Zohreh Rahimi, National Cartographic Center of Iran, Iran

Galileo Interoperable with GPS

ESA’s first two Galileo navigation satellites in space have achieved their latest milestone, transmitting dummy signals in a modulation scheme designed to allow full interoperability with the US GPS once operational services start. An advanced modulation technique offers robust protection against signal interference and the misleading signal reflections known as ‘multipath’. The first two Galileo satellites were launched from Europe’s Spaceport in French Guiana into medium orbits on 21 October 2011, and since then have been progressively put through their paces in a series of tests. These satellites are serving to validate the Galileo system design as well as being... (read more)
2012-07-17 12:00:00

Sokkia Cable-Free GPS

Sokkia (KS, USA) has released the GSR2700 IS Fully Integrated L1/L2 System, featuring Bluetooth wireless technology for completely cable-free surveying. The system has been developed in collaboration with POINT, Inc. (KS, USA) and NovAtel, Inc. (Canada). The survey-grade, dual-frequency GPS receiver, integrated data link, Bluetooth wireless technology, antenna, memory and batteries are all enclosed in a compact, rugged magnesium alloy housing, providing protection in the harshest of environments (IP67 rating). This all-on-the-pole receiver is designed to aid surveyors in a variety of field applications, with internal memory for 500 hours of data collection, along with options for an internal UHF... (read more)
2005-04-20 12:00:00
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