GPS World, January 2012

COVER STORY SECURITY WIRELESS Straight Talk on Anti Spoofing 32 Securing the Future of PNT Disruption created by intentional generation of fake GPS signals could have serious economic consequences This article discusses how typical civil GPS receivers respond to a laboratorys advanced civil GPS spoofing attack and four techniques to counter such attacks spread spectrum security codes navigation message authentication dual receiver correlation of military signals and vestigial signal defense Unfortunately any kind of anti spoofing however necessary is a tough sell Kyle Wesson Daniel Shepard and Todd Humphreys SPECIAL 24 PAGE INSERT 2012 Receiver Survey The only authoritative industry resource for GPS chipset module and receiver manufacturing furnishes detailed design and performance specifications for nearly 500 receivers from 58 companies Sponsored by GPS RECEIVER SURVEY 2012 RECEIVER SURVEY Now in its 20th year the annual GPS World Receiver Survey provides the longest running most comprehensive database of GPS equipment available in one place With information provided by 58 manufacturers on more than 483 receivers the survey assembles data on the most important equipment features Manufacturers are listed alphabetically Footnotes and Abbreviations below supply additional information to guide you through the survey We have made every effort to present an accurate listing of receiver information but GPS World cannot be held responsible for the accuracy of information supplied by the companies or the performance of any equipment listed In some cases data had to be abbreviated or truncated to fit the space available Contact the manufacturers directly with questions about specific units To be listed in the 2013 GPS Receiver Survey e mail GPS World at gpsworld@ gpsworld SPONSORED BY com NOTES 1 User environment and applications 2 Where three values appear they ww ABBREVIATIONS refer to autonomous code real time differential code and post processed apps applications ARINC Aeronautical Radio Inc differential where four values appear they refer to autonomous code async standard asynchronous real time differential code realtime kinematic and post processed bps bits per CP second carrier CEP circular phase error probable 3 Cold start ephemeris almanac and diff differential ext external int internal m min minutes na or NA not applicable differential initial position and time not known 4 For a warm start the receiver has www gpsworld com January 2012 GPSWorld nr no response opt optional par parallel prog programmable ppm parts per million RMS root mean square s seconds SBAS Satellite Based Augmentation System typ typical VRS Virtual reference station a recent almanac current time and initial position but no current ephemeris 5 Reacquisition time is based on the loss of signal for at least one minute 6 E provision for an external antenna R antenna is removable A aviation C recreational D defense G survey GIS H handheld L land M marine Met meteorology N navigation O other P other position reporting R real time DGPS ref S space T timing V vehicle vessel tracking 1 end user product 2 board chipset module for OEM apps LEADERSHIP TALKS 2SOPS Commander Discusses Whats Ahead 17 An interview with Lt Col Jennifer Grant commander of the Second Space Operations Squadron 2SOPS the home of GPS By Don Jewell INNOVATION Know Your Enemy 64 GPS jamming is a continuing threat A detailed understanding of how the available jammers work is necessary to judge their effectiveness and limitations A team of researchers from Cornell University and the University of Texas at Austin reports on their analyses of the signal properties of 18 commercially available GPS jammers By Ryan H Mitch Ryan C Dougherty Mark L Psiaki Steven P Powell Brady W OHanlon Jahshan A Bhatti and Todd E Humphreys January 2012 VOL 23 NUMBER 1 gpsworld com OPINIONS DEPARTMENTS Out in Front 6 Big Bang Cheery By Alan Cameron Expert Advice 8 Give Us This Day Our Daily Bread By David Last and Sally Basker THE SYSTEM 12 Galileo in Its Glory E1 and E5 the Calgary Report GPS III Testbed Sat Delivered Drone Downed GLONASS Fully Operational more THE BUSINESS 18 ITT Exelis Chronos Team on Interference Mitigation Geneq Introduces Worldwide DGPS Beacon Map Spirent Provides Automation World Data Sets Altus Evidence Mapping for Law Enforcement Events more PLUS Telematic Future 30 By Moni Malek ON THE EDGE History Underfoot 73 Secret World War II Underground Bunkers and Tunnels Mapped By Tracy Cozzens WP waterproof WR water resistant www gpsworld com January 2012 GPS World 3