GPS World - May 2008 - (Page 57)

INNOVATION To place an ad in this section, contact Candi Eager, 800-371-6897 x6708, E-mail: ceager@questex.com MARKETPLACE (Continued from page 54) anywhere and anytime. For successful application, the use of error-correction data is the key. A static test showed that besides atmospheric compensation models, the use of precise, 30-second-sampled satellite-clock-correction products is very helpful. The required data are available free of charge but only after a latency of several days, which currently prevents real-time application of the technique. The validation of data from a vehicle test under good GPS conditions with an RTK solution showed that the precision obtained with static data can be maintained when working with kinematic data. Furthermore, the possibility for monitoring the varying precision of the solution has been pointed out. The time-difference method has been developed for flight-data processing. The validation of two flight-path sections with an RTK reference solution with successful ambiguity resolution showed that precision expectations were achieved. New software and hardware developments have spawned a wide variety of GPS applications unthought of only a few years ago. Consideration of the time-difference method might trigger the development of even more applications, adding to the panoply of GPS uses. INDEX Manufacturer The tests used evaluation kits incorporating TIM-LL and TIM-LP GPS receiver modules manufactured by u-blox (www.u-blox.com). JOHANNES TRAUGOTT received his Dipl.-Ing. degree in mechanical engineering (specialization in aerospace technology) at the Technical University of Munich (TUM) in 2004. Subsequently, he started to work on his doctoral thesis with the Institute of Flight Mechanics and Flight Control at TUM where his focus is on satellite navigation and flight path reconstruction. DENNIS ODIJK is a researcher in the Department of Earth Observation and Space Systems (DEOS) of Delft University of Technology (TU Delft) in The Netherlands. He obtained his M.Sc. and Ph.D. in geodetic engineering from the same university. He has been involved in several GNSS-related projects, focusing on ambiguity resolution, ionosphere modeling, and indoor navigation. OLIVER MONTENBRUCK works at the German Space Operations Center of the German Aerospace www.gpsworld.com ADVERTISERS COMPANY PAGE 746 Test Squadron 51 Applanix 11 ESRI 9, 55 Hemisphere GPS 7 ION GNSS 47 JAVAD Insert 19± 26 Laser Technology 57 NavCom Technology 59 Magellan 13 NovAtel 10, 60 OmniSTAR 33 Oxford Technical Solutions 35 Pacific Crest 31 Raytheon 15 Septentrio 16 Spirent Federal 5 Teknobil 17 Telematics Detroit 53 Topcon 2± 3 Wi-Sys 51 COMPANIES COMPANY PAGE Boeing 14 Garmin 58 GMV 27 Hemisphere GPS 27, 28 John Deere 28 Lockheed Martin 14 Novariant 28 OmniSTAR 28 Position One Consulting 12 Qwest 58 Raytheon 14 Sarantel 35 Skypatrol 56 Space Data Corporation 18 Spirent Federal 56 Teejet Technologies 56 Trimble 28 u-blox 35, 56, 57 Center (DLR e.V.) where he is head of the GPS Technology and Navigation Group. He holds a Dr.rer.nat degree in physics and has written various textbooks on computational astronomy and satellite orbits as well as numerous papers on related topics. CHRISTIAN TIBERIUS is an assistant professor with DEOS at TU Delft. He received his Ph.D. from the same university and is involved in research on augmented GNSS positioning, precise point positioning, and data quality control. GOTTFRIED SACHS is the Professor of Flight Mechanics and Flight Control at TUM. One of his research activities is concerned with the application of miniaturized navigation systems to the flight dynamics of aircraft and birds. MORE ONLINE Further Reading View gpsworld.com and click on Innovation under Resources in the left-hand navigation bar for references related to this article. May 2008 | GPS World 57 http://questex.com http://lasertech.com/gpsw http://lasertech.com/gpsw http://www.u-blox.com http://gpsworld.com http://www.gpsworld.com

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GPS World - May 2008 Contents Out in Front Letters to the Editor Expert Advice GPS III Contract Award Now a Reality? Near-Space Location Boost RTK Crops Up in Precision Ag Safety Afoot 50+ Leaders to Watch Making a Difference with GPS Product Showcase Advertisers Index & Company Directory Marketplace Classifieds Seen & Heard

GPS World - May 2008

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