Trimble Vrs Technology

Transcript

Trimble VRS Technology Trimble VrS TecHNology ToolkiT Trimble® VRS™ corrections are more important now than ever before, due to increasing need for real-time high accuracy positioning. This toolkit explains the ease of use and benefits of VRS corrections and is a one-stop shop for information about VRS technology as it relates to Mapping & GIS products and applications. wHaT are VrS correcTioNS? A Trimble VRS system is one option for providing real-time differential correction to your GPS receiver. It is the most commonly used technology behind most network correction services worldwide. Corrections are necessary to eliminate errors and improve the accuracy of GPS positions in collected data. VRS corrections are available from a variety of public and commercial services. VRS networks and subscription services provide dual-frequency (L1/L2) real-time differential GPS (DGPS) and in many cases DGNSS (GPS and GLONASS) corrections to improve accuracy as data is collected. A VRS service uses data from several (permanent) reference stations to compute corrections that are generally more accurate than corrections from a single reference station. These corrections are then broadcast over the Internet. For more information about GPS and differential GPS, go to www.trimble.com/gps and review the ‘All About GPS’ tutorial. See also the GeoExplorer® 2008 series User Guide—‘Using the GPS Receiver, Ensuring the accuracy of your GPS data’, and ‘Differential GPS explained’. wHy do i Need VrS correcTioNS? Use of VRS corrections helps ensure the accuracy of your GPS data, independent of the distance to the nearest reference station. VRS corrections have become even more important since the release of the high accuracy GeoExplorer 2008 series GeoXH™ handheld and the GPS Pathfinder® ProXRT receiver. One of the best ways to achieve decimeter accuracy with these products is using VRS corrections. And this accuracy can be achieved not only after post-processing but in real time, on the spot, in the field. areN’T VrS correcTioNS JuST For SurVeyorS? The need for reliable and accurate positioning is not limited to surveying. Today, a variety of industries including electric and gas utilities, water and wastewater services, and land reform projects require mapping products that provide decimeter accurate positioning in real time. Trimble H-STar TecHNology aNd VrS correcTioNS Trimble H-Star™ technology now works in real-time, which means it can support real-time differential correction sources, such as corrections from a Trimble VRS network or VRS Now™ subscription service. In particular, the Trimble GeoXH 2008 series handheld and the GPS Pathfinder ProXRT receiver, with H-Star technology can now use VRS corrections to attain decimeter accuracy in real time. VRS corrections can be used with other Mapping & GPS receivers to help improve accuracy, but only the GeoXH 2008 series handheld receiver or GPS Pathfinder ProXRT receiver achieve consistent real-time decimeter accuracy. VrS correcTioNS aNd THe geoeXplorer 2008 SerieS geoXH HaNdHeld The GeoXH handheld is the world’s first GPS handheld with a fully integrated dual-frequency (L1/L2) GPS receiver and antenna. It uses EVEREST™ multipath rejection technology as well as Trimble H-Star technology to provide subfoot (<30 cm) accuracy using an internal antenna, and 10 cm accuracy using the optional Zephyr™ antenna, with real-time corrections such as those from a VRS service. Using built-in Bluetooth® wireless technology and a Bluetooth-enabled cell phone, the GeoXH handheld can connect to the Internet to access these real-time VRS corrections. Real-time data collection means you know that a location has been mapped to the desired accuracy level—streamlining workflows and reducing the risk that you will need to recollect data. Using a VRS correction source provides the flexibility to work anywhere within the correction network and provides the best possible accuracy. The GeoExplorer 2008 series User Guide is a great resource providing step-by-step instructions for easy connection to and use of a VRS network or subscription service. Required reading to help you make connections easily: GeoExplorer 2008 series User Guide—‘Using the GPS Receiver, Connecting to a real-time differential correction source’. GeoExplorer 2008 series User Guide—‘Getting Connected, Connecting to a Bluetooth-enabled phone for Internet access or real-time corrections (including Trimble VRS networks)’. VrS correcTioNS aNd THe gpS paTHFiNder proXrT receiVer The GPS Pathfinder ProXRT receiver also brings Trimble H-Star technology to the field in real time. Just wirelessly connect to a VRS service, and you can then collect decimeter (10 cm) positions in the field. One configuration option to achieve decimeter accuracy is using a Trimble Nomad™ G series handheld with integrated cellular modem to access the real-time VRS corrections—connect directly from the handheld to a VRS network for optimal performance, eliminating the need for a separate phone. For more information on configuration and ease of set up, please see: GPS Pathfinder ProXRT receiver User Guide—‘Connecting to Other Equipment, Connecting to an external differential correction source’. wHere iN THe world caN you uSe VrS correcTioNS? Today, municipalities and governments are building VRS networks across the globe, and many private companies have also seen the benefits in setting up their own VRS networks. To find out whether you can access a VRS network, review this online list of some of the Trimble VRS installations around the world: www.trimble.com/vrsinstallations For further information, please visit www.trimble.com/vrs. Or contact your local Trimble reseller who can advise on networks available to you or provide information on setting up your own VRS network. Trimble VRS Now subscription services Subscription services such as Trimble VRS Now provide instant access to VRS corrections on demand without the cost or work involved in setting up your own VRS network. The Trimble VRS Now subscription services are available in defined coverage areas as noted below. However the method of usage and benefits of such subscription services are also applicable to using other VRS correction sources such as private or public VRS networks. In addition to RTK (real-time kinematic) corrections which provide centimeter-level accuracy for surveying equipment, and decimeteraccuracy with the GeoXH 2008 series handheld or GPS Pathfinder ProXRT receiver, Trimble VRS Now offers correction services specific to the needs of Mapping & GIS customers: • H-Star corrections for decimeter-accuracy • DGPS corrections for submeter level accuracy H-Star correction services are currently available to users in coverage regions throughout Europe and the USA enabling instant access to H-Star corrections on demand with the GeoXH 2008 series handheld receiver or GPS Pathfinder ProXRT receiver. A subscription to the Trimble VRS Now H-Star service gives you the ability to obtain real-time, decimeter level accurate positions consistently and directly at the job site. For further information about the Trimble VRS Now H-Star service, including coverage region maps, FAQs, and links to subscribe online go to: www.trimble.com/mgis_vrsnow_h-star For specific queries on Trimble VRS Now subscription services contact your local Trimble reseller. RTK and DGPS Trimble VRS Now services are also available in coverage areas throughout Europe and the USA. More information on RTK and DGPS corrections and details of coverage regions can be found here www.trimble.com/vrsnow. Trimble VRS Now H-Star Service Is it easy to use VRS Now H-Star subscription service? H-Star Corrections on Demand Yes! The basic easy workflow for use of Trimble VRS Now H-Star corrections is as follows: Trimble Managed Services Center How it works 1. CONNECT 1 1 CO Just com to t Just power up your Trimble H-Star decimeter compatible receiver (either GeoXH 2008 series handheld receiver or GPS Pathfinder ProXRT receiver) and connect to the system. 2 2 CO 2. CORRECT Trimble VRS Now H-Star service delivers decimeter-accurate H-Star corrections tailored for your geographic location. 3. COLLECT Collect your data with precision and confidence for accurate mapping. Trim deli corr geo Network Server 3 Network Reference Station 3 CO Col con Who is already using VRS corrections and subscription services AND why? Organizations around the world are already using VRS corrections and subscription services in order to improve accuracy and efficiency in their data collection and maintenance operations. For example, one of the UK's largest metropolitan district councils utilized VRS corrections to collect spatially accurate data on more than 12,000 street signs and road markings. UK traffic management legislation required high accuracy mapping of signs and road markings, so council workers used GeoXT handhelds in conjunction with Trimble's VRS Now service to collect real-time submeter data quickly and accurately. In the words of the chief surveyor for the council: “Accessing the Trimble VRS Now service for real-time corrections in the field was easy. The field workers just received the VRS connections via a mobile phone, which then connected to the GeoXT handheld via Bluetooth. There were no wires and no bulky accessories, and the precise corrections were delivered right to the handheld.” He also stated: “Being able the achieve such high accuracy in the field eliminated a lot of post-processing work back in the office, which meant we could focus on the task at hand—collecting data as efficiently and accurately as possible...with Trimble VRS Now, corrections are actually delivered directly to the handheld on the spot, so you immediately have accurate information at your fingertips.” To read the full story, and to find information about how other Mapping & GIS customers are using Trimble solutions, go to www.trimble.com/mgis. © 2009, Trimble Navigation Limited. All rights reserved. Trimble, the Globe & Triangle logo, GeoExplorer, and GPS Pathfinder are trademarks of Trimble Navigation Limited, registered in the United States and in other countries. EVEREST, GeoXH, GeoXT, H-Star, VRS, VRS Now, and Zephyr are trademarks of Trimble Navigation Limited. Nomad is a registered trademark of Tripod Data Systems Inc. The Bluetooth word mark and logos are owned by the Bluetooth SIG, Inc. and any use of such marks by Trimble Navigation Limited is under license. All other trademarks are the property of their respective owners. PN 022501-156B (02/09) NORTH & SOUTH AMERICA Trimble Navigation Limited 10355 Westmoor Drive Suite #100 Westminster, CO 80021 USA +1-720-587-4574 Phone +1-720-587-4878 Fax YOUR LOCAL TRIMBLE OFFICE OR REPRESENTATIVE EUROPE & AFRICA Trimble GmbH Am Prime Parc 11 65479 Raunheim GERMANY +49-6142-2100-0 Phone +49-6142-2100-550 Fax ASIA-PACIFIC & MIDDLE EAST Trimble Navigation Singapore PTE Limited 80 Marine Parade Road #22-06 Parkway Parade Singapore, 449269 SINGAPORE +65-6348-2212 Phone +65-6348-2232 Fax www.trimble.com store.trimble.com