Loran Articles & Presentations

Enhanced or eLoran for Time and Frequency Applications, by Linn Roth, Paul Schick, Jim Jacoby, Chad Schweitzer, Dean Gervasi, and Eric Wiley, Locus, Inc., at 2005 IFC Symposium and PTTI Systems and Application Meeting, August 29-31, 2005.

Loran-C Based Windfinding in Meteorology, presented by Kenneth Goss, Vaisala, at Volpe Center meeting, June 30, 2005.

eLoran Systems for Integration with GPS for Marine Applications, by G. Linn Roth, Ph.D., FRIN, at the Radio Technical Commission for Marine Services (RTCM) annual assembly, May 2005.

UK Minister Calls for GPS Alternative, from Safety at Sea International, November 2004.

Integrated GPS/Loran Prototype, by G. Linn Roth, Ph.D., FRIN, Locus, Inc., James L. Davis, Ph.D., FreeFlight Systems, and Mitchell J. Narins, Federal Aviation Administration, at RIN, November 2004.

Evaluation of Loran Timing Receivers at NPL (presentation), by R. Hlavac and P. W. Stacey, Time and Frequency, Division of Enabling Metrology, NPL.

Evaluation of Loran Timing Receivers at NPL, by R Hlavac and PW Stacey of the National Physical Laboratory, Middlesex, UK at RIN, November 2004.

LORAN-C Time and Frequency Equipment Capstone, by Tom Celano, Timing Solutions Corporation and LT Kevin Carroll, USCG Loran Support Unit, at ILA33, October 2004.

Rugby Site Conversion, by Patrick Patent at ILA33, October 2004.

New Life for Loran - Part 2, by Clifford Appel, as published in Nuts & Volts, September 2004.

New Life for Loran - Part 1,by Clifford Appel, as published in Nuts & Volts, August 2004.

Comparison Between GPS and Loran Performance Using Indoor and Outdoor Loran Antennas, by Jim Jacoby, Chad Schweitzer, Paul Schick and Heather Monson, as presented at IEEE-UFFC, August 2004.

A New Era For Loran, by G. Linn Roth as printed in the August 2004 issue of Avionics Magazine.

Loran is Back, Baby, by by Robert Gardner - IFR Magazine, August 2004.

Long Live Loran, by George Marsh - Avionics Magazine, June 2004

Enhanced Loran and GPS/WAAS System for Aviation, by G. Linn
Roth, Ph.D., FRIN, Locus, Inc., James L. Davis, Ph.D., FreeFlight Systems, and Mitchell J. Narins, Federal Aviation Administration, as presented at ENC-GNSS, May 2004.

The Road to an eLoran Decision in the United States: The Results of the Loran Technical Evaluation, by Mitchell J. Narins of the Federal Aviation Administration as presented at ENC-GNSS, May 2004.

Additional Secondary Factor Corrections for Aviation Applications , by G. Linn Roth, Ph.D., FRIN, Locus, Inc., David Diggle, Ph.D., Avionics Engineering Center, Ohio University and Mitchell J. Narins, Federal Aviation Administration as presented at EURAN 2004, June 2004.

New Integrated GPS/Loran Prototype for Aviation, by G. Linn Roth, Ph.D., FRIN, Locus, Inc., James L. Davis, Ph.D., FreeFlight Systems, and Mitchell J. Narins, Federal Aviation Administration as presented at EURAN 2004, June 2004.

Contemporary Enhanced Loran Technology: GPS/Loran-C/Eurofix Empfanger GLEE II, by Waldemar Kordass, ATLAS ELEKTRONIK and Linn Roth, Locus, Inc. as presented at EURAN 2004, June 2004.

Development and Status of Integrated GPS/Loran Prototype for Aviation, by G. Linn Roth, Ph.D., FRIN, Locus, Inc., James L. Davis, Ph.D. FreeFlight Systems, and Mitchell J. Narins, Federal Aviation Administration as presented at ION, June 2004.

Status of U.S. Loran Evaluation and Integrated GPS/Loran Development Program - Ability of a Modern Loran System to Augment and Backup GNSS, by G. Linn Roth, Ph.D., Locus, Inc.; Mitchell J. Narins, Federal Aviation Administration; James H. Doty and Patrick Y. Hwang, Ph.D., Rockwell Collins, Inc. as presented at GNSS 2004, May 2004.

Integrated GPS/Loran Prototypes for Aviation Applications, by G. Linn Roth, PhD., FRIN, Locus, Inc. and Mitchell J. Narins, Federal Aviation Administration as presented at the 4th Integrated Communications, Navigation and Surveillance (ICNS) Technologies Conference & Workshop, April, 2004.

Enhanced (E) Loran in Telecommunications Applications: The New Loran and its Potential in Telecommunication Synchronization and Timing, by G. Linn Roth, President of Locus, Inc., as presented at the 2004 NIST-T1X1 Workshop on Synchronization in Telecommunication Systems, February 2004.

"Is Loran-C the Answer to GPS Vulnerability?", by David Last, University of Wales, Bangor, UK, as featured in the European Journal of Navigation, Volume 1, Number 3, December 2003.

Integrated GPS/Loran Navigation Sensor for Aviation Applications, By James H. Doty, David A. Anderson and Patrick Y. Hwang, Ph.D., Rockwell Collins, Inc., Linn Roth, Ph.D., Locus, Inc. as presented to the International Loran Association, November 2003.

Contemporary Enhanced Loran Technology: GPS/Loran-C/Eurofix Environment GLEE, By Carsten Collrep, Michael Haberland, Bernd Hagemann, Andree Opt’Hof, ATLAS Elektronik
and Linn Roth, Locus Inc. as presented to the International Loran Association, November 2003.

Loran in 2003 and Beyond - Standardization of Loran as the Most Complementary, Necessary Backup to GNSS, By G. Linn Roth, President of Locus, Inc. as presented to The 12th Session
of the Council of the Far East Radionavigation Service (FERNS).

Performance and Status Update on Integrated GPS/Loran Development Program, By G. Linn Roth, Ph.D., Locus, Inc.; Mitchell J. Narins, Federal Aviation Administration; James H. Doty and Patrick Y. Hwang, Ph.D., Rockwell Collins, Inc. as presented at Annual DGON Meeting, June 2003.

GPS/Loran-C Eurofix Empfanger GLEE, By Carsten Collrep, Michael Haberland of STN ATLAS Elektronik, and Linn Roth of Locus, Inc. as presented at EURAN 2003 in June 2003.

GPS Safety Net: GPS-Loran Prototype Processor, By G. Linn Roth, Ph.D., James H. Doty and Patrick Y. Hwang, Ph.D. as seen in the May 2003 issue of GPS World Magazine.

Status of US Loran Evaluation and Integrated GPS/Loran Development Program-Ability of a Modern Loran System to Augment and Backup GPS, By G. Linn Roth, Ph.D., Mitchell J. Narins, James H. Doty and Patrick Y. Hwang, Ph.D., As presented at the GNSS Meeting in Graz Austria, April 2003.

Loran in 2003, by G. Linn Roth, Ph.D., McGraw-Hill 2003 Yearbook of Science and Technology.

Status of Integrated GPS/Loran Prototype System for FAA Flight Trials, by G. Linn Roth, Ph.D., Locus, Inc., Patrick Y. Hwang, Ph.D., James H. Doty, Rockwell Collins Inc., and Mitchell J. Narins, FAA, Institute of Navigation National Technical Meeting, January 2003.

New Ways of Looking at Loran-C ASFs, by David Last and Paul Williams, University of Wales, 31st International Loran Association Convention and Technical Symposium, October 2002

Status Update of the US Loran-C Development and Evaluation Programme, by Linn Roth, Ph.D., Locus, Inc., Mitchell J. Narins, FAA, and Patrick Y Hwang, Ph.D., Rockwell Collins, Inc., NAV02, Royal Institute of Navigation, November 2002.

Flight Trials of All-in-View Loran Receiver and H-Field Antenna System, by Linn Roth, Ph.D., Jim Schliem, Locus, Inc., Dave Diggle, Ph.D., Ohio University Avionics Engineering Center, and Mitchell J. Narins, FAA, 31st International Loran Association Convention and Technical Symposium, October 2002.

Preliminary Results of Differential Loran Studies with All-in-View Receiver, by Paul Schick, Linn Roth, Ph.D. and Jim Schliem, Locus, Inc, 31st International Loran Association Convention and Technical Symposium, October 2002.

Loran as an Independent Source of UTC in Telecommunication Applications, by William J. Walsh, Motorola, Inc., 31st International Loran Association Convention and Technical Symposium, October 2002.

Program and Status Update on Development of Integrated Loran/GPS Receiver and GPS/Loran Antenna System, by Linn Roth, Ph.D., Locus, Inc., and Patrick Y. Hwang, Ph.D., Rockwell Collins, Inc., German Institute of Navigation (DGON), June 2002.

European Sea Trials of Kalman-filtered Loran-C System, by Carsten Collrep, STN Atlas, Linn Roth, Locus, Inc., and David Last, University of Wales, Bangor, in Ortung und Navigation Journal 1, 2002.

Modern Loran Receivers: Current Performance and Future Enhancements, by Linn Roth, Ph.D., Radio Technical Commission for Maritime Services, May 2002.

Loran-C As A Secondary Navaid To Complement GPS, by Patrick Y. Hwang, Rockwell Collins Inc., Robert N. Snow, Boeing Company, G. Linn Roth, Locus Inc., and Mitchell J. Narins, Federal Aviation Administration, 3rd Integrated Communications, Navigation, and Surveillance (ICNS) Conference, May 2002.

Performance of DSP-Loran/H-field Antenna System and Implications for Complementing GPS, by G. Linn Roth, Ph.D., Dean J. Gervasi, James L. Jacoby, Paul W. Schick, Chad A. Schweitzer, and James L. Schliem, Locus, Inc., Institute of Navigation National Technical Meeting, January 2002.

Performance of DSP-Loran/H-Field Antenna System and Implications for Complementing GPS by G.L. Roth, D. Gervasi, J. Jacoby, P. Schick, C. Schweitzer, and J. Schliem of Locus, Incorporated, as seen in the Summer 2002 issue of the Journal of the Institute of Navigation.

European Sea Trials of Kalman-filtered Loran-C System, by Carsten Collrep, STN Atlas, Jim Schliem, Paul Schick, and Linn Roth, Locus, Inc., 30th International Loran Association Convention and Technical Symposium, October 2001.

Flight Trials Comparing SatMate DSP Loran Receiver, GPS, and Legacy Loran Receivers, by Jim Schiem, Paul Schick, and Linn Roth, Locus, Inc., 30th International Loran Association Convention and Technical Symposium, October 2001.

Development and Status of H-field Antenna and DSP-Loran Receiver for FAA Loran Program, by Jim Schliem, Linn Roth, Paul Schick, Chad Schweitzer, Jim Jacoby, Dean Gervasi, and Jim Weikert – Locus, Inc., 30th International Loran Association Convention and Technical Symposium, October 2001.

Use of a Single Analog-to-Digital (ADC) Converter for Dual-Loop Loran H-field Antenna, by Paul Hannon, Zhikui Ren, Paul Schick, and Jim Weikert, Locus, Inc., 29th International Loran Association Convention and Technical Symposium, November 2000.

New Loran Capabilities Enhance Performance of Hybridized GPS/Loran Receivers, by G. Linn Roth, Ph.D., and Paul W. Schick, Locus, Inc., Navigation 46:4, 1999-2000.

The Case for Loran, by G. Linn Roth, Ph.D., Locus, Inc., in The Journal of Air Traffic Control, July-September 1999.

Improved SNRs and Adaptive Filtering in New DSP-based Loran-C Receivers, Paul W. Schick, Zhikui Ren and G. Linn Roth, PhD, Locus, Incorporated, as presented at Loran-C, Satellite and Integrated Systems for the 21st Century, November 1999.

Advantages of a Combined GPS/Loran-C Precision Timing Receiver, by James Jacoby, Paul W. Schick, Frank Richwalksi and Kevin Zamzow, Locus, Incorporated as presented at Loran-C, Satellite and Integrated Systems for the 21st Century, November 1999.

Loran Receiver Technology - Yesterday, Today and Tomorrow, by G. Linn Roth, Ph.D. and Paul Schick, Locus, Inc., 27th International Loran Association Convention and Technical Symposium, October 1998.

New Loran Receiver Technology Significantly Improves Overall System Performance and Substantiates Loran Viability as GPS Backup, by G. Linn Roth, Ph.D., Thomas P. Blandino, and Paul W. Schick, Locus, Inc, Institute of Navigation National Technical Meeting, January 1996.

Cross-Rate Interference Effects and Differential Loran Operation, by Paul W. Schick, Locus, Inc., 25th International Loran Association Convention and Technical Symposium, November 1996.