(last update 2017.05.25)

[63] D. Kim, M. Yoon, J. Lee, S. Pullen, and D. Weed, “Monte Carlo Simulation for Impact of Anomalous Ionospheric Gradients on GAST-D GBAS,” ION Pacific PNT 2017, Hawaii, May, 2015.

[62] M. Kim, J. Lee, D. Kim, and J. Lee, “Design of Local Area DGNSS Architecture to Support Unmanned Aerial Vehicle Networks: Concept of Operations and Safety Requirements Validation,” ION Pacific PNT 2017, Hawaii, May, 2015.

[61] P. Choi, E. Bang, and J. Lee, “Expanded-kriging-based Ionospheric Map for Safety-critical Users in the East Asia region,” 2016 AGU fall Meeting, San Francisco, California, December 12-16, 2016.

[60] E. Hyeon, and J. Lee, “Application of Weighted Least Square RAIM to Multi-Sensor Navigation Integrated with Space-Based Augmentation System,” 2016 8th KAIST-Kyushu University Symposium on Aerospace Engineering, Daejeon, Korea, October, 2016.

[59] H. Chang, M. Yoon, and J. Lee, “Validation of Large Ionospheric Gradient Observed in India on 15th, February 2015,” 2016 8th KAIST-Kyushu University Symposium on Aerospace Engineering, Daejeon, Korea, October, 2016.

[58] J. Lee, E. Hyeon, M. Kim, and J. Lee, “Vertical Position Error Bounding for Integrated GNSS/Onboard Sensors to Support Unmanned Aerial Vehicle (UAV),” The 30th Congress of the International Council of the Aeronautical Sciences, Daejeon, Korea, September, 2016.

[57] J. Lee, M. Kim, and J. Lee, “Integration of INS/Barometer and Local Area DGNSS to Support High Integrity Unmanned Aerial Vehicle (UAV) Navigation,” ION GNSS+ 2016, Portland, California, September, 2016.

[56] E. Bang, “Expanded Ionospheric Estimation and Threat Model Algorithms for SBAS,” ION GNSS+ 2016, Portland, California, September, 2016.

[55] Invited Paper, J. Lee, “Equatorial Plasma Bubble Effects on GBAS and Its Mitigation Techniques”, International Beacon Satellite Symposium 2016, Trieste, Italy, June, 2016

[54] M. Yoon, D. Kim, J. Lee, S. Rungraengwajiake, and S. Pullen, “Assessment of Equatorial Plasma Bubble Impacts on Ground-Based Augmentation Systems in the Brazilian Region,” 2016 ION International Technical Meeting (ITM), Monterey, California, January, 2016.

[53] E. Hyeon and J. Lee, “Validation of DSIGMA Monitor for GBAS Category II/III Operations,” 2015 7th KAIST-Kyushu University Symposium on Aerospace Engineering, Kyushu, Japan, December, 2015.

[52] D. Lee and J. Lee, “Validation of Code Carrier Divergence Monitor for GBAS Category II/III Operations,” 2015 7th KAIST-Kyushu University Symposium on Aerospace Engineering, Kyushu, Japan, December, 2015.

[51] K. Sun, M. Yoon and J. Lee, “Statistical Assessment of Ionospheric Perturbation Amplitudes Caused by Tohoku-Oki Earthquake in Japan,” 2015 7th KAIST-Kyushu University Symposium on Aerospace Engineering, Kyushu, Japan, December, 2015.

[50] P. Choi, M. Yoon, Y. Yang, J. Lee and A. Komjathy, “Ionospheric Signatures of the Earthquake in South Korea on 31 March 2014,” 2015 AGU fall Meeting, San Francisco, California, December, 2015.

[49] J. Lee, S. Pullen, J. Lee, “Vertical Position Error Bounding for Integrated Sensors to Support Unmanned Aerial Vehicles (UAV),” SCPNT 2015, Stanford, USA, November, 2015.

[48] D. Kim, K. Lee, J. Jang, J. Lee, “Characterization of GLONASS Clock and Ephemeris Error for Advanced Receiver Autonomous Integrity Monitor (ARAIM),” IS GNSS 2015, Kyoto, Japan, November, 2015.

[47] S. Pullen, J. Lee, and M. Yoon, “Optimal Scheduling of Arrivals at Low-Lattitude Airports under Severe Ionospheric Spatial Gradients,” The 4th ENRI International Workshop on ATM/CNS, Tokyo, Japan, November, 2015.

[46] J. Lee, M. Yoon, S. Pullen, et al., “Preliminary Results from Ionospheric Threat Model Development to Support GBAS Operations in the Brazilian Region,” ION GNSS 2015, Tampa, Florida, September, 2015.

[45] M.-S. Circiu, M. Felux, B. Belabbas, M. Meurer, M. Kim, J. Lee, and S. Pullen, “Evaluation of GPS L5, Galileo E1 and Galileo E5a Performance in Flight Trials for Multi Frequency Multi Constellation GBAS,” ION GNSS 2015, Tampa, Florida, September, 2015.

[44] M. Kim, D. Lee, E. Bang, and J. Lee, “Mobile Differential GNSS Architecture Utilizing UAV Networks: A Conceptual Framework and Key Issues,” ION Pacific PNT 2015, Hawaii, April, 2015.

[43] M. Yoon, D. Kim, S. Pullen, and J. Lee, “Multi-dimensional Verification Methodology of Ionospheric Gradient Observation during Plasma Bubble Events in the Brazilian Region,”ION Pacific PNT 2015, Hawaii, April, 2015.

[42] Michael Felux, J. Lee, Florian Holzapfel, “Total System Performance in GBAS-based Landings,” ION Pacific PNT 2015, Hawaii, April, 2015.

[41] M. Yoon, D. Kim, Y. Yang, A. Komjathy, and J. Lee, “Ionospheric Signatures of North Korean Nuclear Test on 12 February 2013,” 2014 AGU fall Meeting, San Francisco, California, December, 2014.

[40] J. Lee, M. Yoon, and J. Lee, “Space Weather Prediction Error Bounding for Real-Time Ionospheric Threat Adaptation of GNSS Augmentation Systems,” 2014 AGU fall Meeting, San Francisco, California, December, 2014.

[39] D. Kim, M. Yoon, and J. Lee, “Observing Large Ionospheric Spatial Decorrelation for Ground-Based Augmentation System in the Brazilian Region,” 2014 AGU fall Meeting, San Francisco, California, December, 2014.

[38] E. Bang, J. Lee, and J. Lee, “Ionospheric Delay Estimation using Kriging for Korean SBAS,” ISGNSS 2014, Jeju, October, 2014.

[37] M. Yoon, E. Bang, and J. Lee, “The Use of SBAS GIVE for Improving CAT-I GBAS Availability in the Korean Region,” ISGNSS 2014, Jeju, October, 2014.

[36] D. Lee, M. Kim, K. Kim, and J. Lee, “Fast Location Survey of DGNSS Reference Station to Support UAV Navigation,” ICCAS 2014, Seoul, October, 2014.

[35] M. Kim, K. Kim, J. Lee, and S. Pullen, “High Integrity GNSS Navigation and Safe Separation Distance to Support Local-Area UAV Networks,” ION GNSS 2014, Tampa, Florida, September, 2014.

[34] J. Lee, D. Kim, J. Lee, and T. Walter, “VPL Parameter Determination for Improved Performance of Advanced RAIM,” ION GNSS 2014, Tampa, Florida, September, 2014.

[33] P. Choi, and J. Lee, “Selection of Korea SBAS Reference Stations By Analyzing GPS Satellite Clock and Ephemeris Error Bound,” 2014 APNN & MAPWiST, Seoul, August, 2014.

[32] J. Lee, J. Lee, S. Pullen, and S. Datta-Barua, “Conceptual Study of Real-time Ionospheric Threat Adaptation Using Space Weather Forecasting for GNSS Augmentation Systems,” 2014 ION International Technical Meeting (ITM), San Diego, California, January, 2014.

[31] J. Lee and J. Lee, “Analysis of Correlation between Ionospheric Spatial Gradients and Space Weather Intensity under Nominal Conditions for Ground-Based Augmentation Systems,” 2013 AGU fall Meeting, San Francisco, California, December, 2013.

[30] M. Yoon and J. Lee, “Characteristics of Ionospheric Irregularities during Storm-Induced Traveling Ionospheric Disturbances over the Korean Region,” 2013 6th KAIST-Kyushu University Symposium on Aerospace Engineering, Daejeon, Korea, November, 2013.

[29] Y. Yang, A. Komjathy, M. Butala, A. J. Mannucci, J. Snively, M. Hickey, D. Galvan, J. Lee, and R. B. Langley, “Ionospheric Natural Hazard Detection Using GNSS Measurements: Investing the Chelyabinsk Meteor Impact,” ION GNSS 2013, Nashville, Tennessee, September, 2013.

[28] S. Pullen, and J. Lee, “Guidance, Navigation, and Separation Assurance for Local-Area UAV Networks: Putting the Pieces Together,” ION PNT 2013, Honolulu, Hawaii, April, 2013.

[27] E. Bang, J. Lee, J. Lee, J. Seo, and T. Walter, “Constructing Ionospheric Irregularity Threat Model for Korean SBAS,” ION PNT 2013, Honolulu, Hawaii, April, 2013.

[26] E. Bang, J. Lee, and J. Lee, “Assessing the availability of a single-frequency satellite based augmentation system in the Korea region,” EIWAC 2013, Tokyo, February, 2013.

[25] M. Kim, J. Lee, S. Pullen, and J. Gillespie, ”Optimized GNSS Network Station Selection to Support the Development of Ionospheric Threat Models for GBAS,” ION ITM 2013, San Diego, January, 2013.

[24] S. Pullen, J. Lee, and P. Enge, “High-Integrity Local-Area Differential GNSS Architectures Optimized to Support Unmanned Aerial Vehicles (UAVs),” ION ITM 2013, San Diego, January, 2013.

[23] S. Jeong, T. Kim, J. Lee, S. Lee, and J. Lee, “Design Analysis of Precision Navigation System,” ICCAS 2012, Jeju, October, 2012.

[22] S. Jeong, S. Lee, and J. Lee, “Algorithm Analysis for GNSS Spoofing Detecting System,” APISAT 2012, Jeju, September, 2012.

[21] Y. Choi, M. Kim, and J. Lee, “Extreme Ionospheric Gradients Observed in South Korea during the Last Solar Cycle,” 2012 AGU Fall Meeting, San Francisco, November, 2012.

[20] M. Kim, J. Lee, S. Pullen, and J. Gillespie, “Data-Quality Improvements and Applications of Long-Term Monitoring of Ionospheric Anomalies for GBAS,” ION GNSS 2012, Nashville, September, 2012.

[19] E. Bang, J. Lee, J. Seo, S. Pullen, and S. Close, “Automated Ionospheric Front Velocity Estimation Algorithm for Ground-Based Augmentation Systems,” ION ITM 2012, Newport Beach CA, February, 2012.

[18] J. Lee, S. Jung, M. Kim, J. Seo, S. Pullen, and S. Close, “Results from Automated Ionospheric Data Analysis for Ground-Based Augmentation Systems (GBAS),” ION ITM 2012, Newport Beach CA, February, 2012.

[17] J. Lee, S. Jung, and S. Pullen, “Enhancements of Long-Term Ionospheric Anomaly Monitoring for the Ground-Based Augmentation System,” ION ITM 2011, San Diego CA, January, 2011.

[16] J. Lee, S. Jung, E. Bang, S. Pullen, and P. Enge, “Long Tem Monitoring of Ionospheric Anomalies to Support the Local Area Augmentation System,” ION-GNSS 2010, Portland OR, September, 2010.

[15] J. Lee, S. Jung, and E. Bang, “Estimation of GPS Receiver Inter-Frequency Bias for Operational Ionosphere Monitoring in GBAS,” EIWAC 2010, Tokyo, November, 2010.

[14] G. Gao, H. Tang, J. Blanch, J. Lee, T. Walter and P. Enge, “Methodology and Case Studies of Signal-in-Space Error Calculation: Top-down Meets Bottom-up,” ION-GNSS 2009, Savannah GA, September, 2009.

[13] S. Ramakrishnan, J. Lee, S. Pullen, and P. Enge, “Targeted Ephemeris Decorrelation Parameter Inflation for Improved LAAS Availability during Severe Ionosphere Anomalies,” ION NTM 2008, San Diego CA, January, 2008.

[12] Y.S. Park, G. Zhang, S. Pullen, J. Lee, and P. Enge, “Data-Replay Analysis of LAAS Safety During Ionosphere Storms,” ION-GPS 2007, Fort Worth TX, September, 2007.

[11] G. Zhang, J. Lee, S. Datta-Barua, S. Pullen, and P. Enge, “Low-Elevation Ionosphere Spatial Anomalies Discovered from the 20 November 2003 Storm,” ION NTM 2007, San Diego CA, January, 2007.

[10] J. Lee, M. Luo, S. Pullen, YS. Park, P. Enge, and M. Brenner, “Position-Domain Geometry Screening to Maximize LAAS Availability in the Presence of Ionosphere Anomalies,” ION-GPS 2006, Fort Worth TX, September, 2006.

[9] J. Lee, S. Pullen, S. Datta-Barua, and P. Enge, “Assessment of Nominal Ionosphere Spatial Decorrelation for LAAS,” the IEEE/ION Position Location and Navigation Symposium, San Diego CA, April, 2006.

[8] J. Lee, “LAAS Position Domain Monitor Analysis and Test Results for CAT II/III Operations,” ION-GPS 2004, Long Beach CA, September, 2004.

[7] S. Pullen, J. Lee, G. Xie, and P. Enge, “CUSUM-based Real-Time Risk Metrics for Augmented GPS and GNSS,” ION-GPS 2003, Portland OR, September, 2003.

[6] J. Lee, S. Pullen, and P. Enge, “LAAS Position Domain Monitor Analysis and Failure-Test Verification,” 21st AIAA ICSSC, Yokohama Japan, April, 2003.

[5] S. Pullen, M.Luo, G. Xie, J. Lee, E. Phelts, D. Akos, and P. Enge, “LAAS Ground Facility Design Improvements to Meet Proposed Requirements for Category II/III Operations,” ION-GPS 2002, Portland OR, September, 2002.

[4] S. Pullen, J. Lee, M. Luo, B. Pervan, FC. Chan, and L. Gratton, “Ephemeris Protection Level Equations and Monitor Algorithms for GBAS,” ION-GPS 2001, Salt Lake City UT, September, 2001.

[3] J. Lee, S. Pullen, G. Xie, and P. Enge, “LAAS Sigma-Mean Monitor Analysis and Failure-Test Verification,” ION NTM 2001, Albuquerque NM, June, 2001.

[2] G. Xie, S. Pullen, M.Luo, P. Normark, D, Akos, J. Lee, and P. Enge, “Integrity Design and Updated Test Results for the Stanford LAAS Integrity Monitor Testbed,” ION NTM 2001, Albuquerque NM, June, 2001.

[1] P. Normark, G. Xie, D, Akos, S. Pullen, M.Luo, J. Lee, and P. Enge, “The Next Generation Integrity Monitor Testbed for Ground System Development and Validation Testing,” ION-GPS 2001, Salt Lake City UT, September, 2001.


Global Navigation Satellite Systems Laboratory, Department of Aerospace Engineering
KAIST 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
Tel) +82-42-350-3725 Fax) +82-42-350-5765