GPS World, February 2012

INNOVATION Antenna Technology FIGURE 10 Mean C N 0 measurements of the quadrifilar antenna from all measurements and those only at 45 º and 85 º elevation angles as a function of antenna distance from the body Conclusions Acknowledgments Manufacturers u blox AG Allis Communication Co Ltd Sarantel Ltd JARED B BANCROFT is a senior research engineer in the Position Location And Navigation PLAN Group in the Department of Geomatics Engineering at The University of Calgary in Calgary Alberta Canada He received his Ph D in geomatics engineering in 2010 and has worked in the area of navigation since 2004 Dr Bancrofts research interests include pedestrian and vehicular navigation through data fusion of sensors and satellite navigation data VALÉRIE RENAUDIN is a senior research associate in the PLAN Group She received an M S in geomatics engineering from the Ecole Supérieure des Géomètres et Topographes France in 1999 and a doctorate in geomatics engineering from the Ecole Polytechnique Fédérale de Lausanne in 2009 She was previously the technical director at Swissat AG Her research interests include low cost sensors hybridization techniques magnetometers and indoor navigation AIDEN MORRISON is a senior research associate in the PLAN Group He received his B Eng in electrical engineering from Ryerson University Canada in 2006 and a Ph D in geomatics engineering from The University of Calgary in 2010 His research interests include development of integrated navigation systems GÉRARD LACHAPELLE holds a Canada Research Chair in Wireless Location in the Department of Geomatics Engineering at The University of Calgary where he has been a professor since 1988 and heads the PLAN Group He has been involved in a multitude of GNSS R D projects since 1980 ranging from RTK positioning to indoor location and GNSS signal processing enhancements MORE ONLINE Further Reading For references related to this article go to gpsworld com and click on Richard Langleys Innovation in the left hand navigation menu COPYRIGHT 2012 QUESTEX MEDIA GROUP LLC All rights reserved No part of this publication may be reproduced or transmitted in any form or by any means electronic or mechanical including by photocopy recording or information storage and retrieval without permission in writing from the publisher Questex Media Group LLC Authorization to photocopy items for internal educational or personal use or the internal educational or personal use of specific clients is granted by Questex Media Group LLC for libraries and other users registered with the Copyright Clearance Center 222 Rosewood Dr Danvers MA 01923 978 750 8400 fax 978 750 4470 For uses beyond those listed above please direct your written request to questexpermissions@ theygsgroup com or 800 494 9051 Ext 100 PRIVACY NOTICE Questex Media Group provides certain customer contact data such as customers names addresses phone numbers and e mail addresses to third parties who wish to promote relevant products services and other opportunities which may be of interest to you If you do not want Questex Media Group to make your contact information available to third parties for marketing purposes simply call toll free 866 344 1315 or 1 847 763 9594 Outside the US between the hours of 8 30 am and 5 pm CT and a customer service representative will assist to remove your name from Questexs lists GPS WORLD ISSN 1048 5104 is published monthly 12 issues yr by Questex Media Group LLC 306 W Michigan St Ste 200 Duluth MN 55802 SUBSCRIPTION RATES U S and possessions 1 year 12 issues 8000 2 years 24 issues 12870 Canada and Mexico 9570 1 year 15070 2 years All other countries 15500 1 year 25520 2 years International pricing includes air expedited service Single copies prepaid only 7 in the United States 9 all other countries Back issues if available are 19 in the U S and possessions 23 all other countries Include 650 per order plus 2 per additional copy for U S postage and handling Periodicals postage paid at Duluth MN 55806 and additional mailing offices POSTMASTER Please send address changes to GPS WORLD P O Box 1270 Skokie IL 60076 8270 USA Canadian G S T number 840 033 278 RT0001 Publications Mail Agreement Number 40017597 Printed in the U S A GPS World February 2012 www gpsworld com 66