publications

2025

  1. NAVIGATION
    Ionospheric scintillation effects on LEO-transmitted signals across multiple frequency bands
    A. K. Sun, Y. J. Morton, C. Rino, and J. Lee
    NAVIGATION, 2025
    Accepted
  2. JGR Space Physics
    Assessment of the generation of traveling ionospheric disturbances by solar terminators
    H. Kil, A. K. Sun, S. -H. Lee, W. K. Lee, Kim J. -H, and 1 more author
    Journal of Geophysical Research: Space Physics, 2025
    DOI
  3. IEEE TAES
    Analysis of diffraction-induced residual errors in GNSS augmentation systems under ionospheric scintillation
    A. K. Sun, S. Pullen, and J. Lee
    IEEE Transactions on Aerospace and Electronic Systems, 2025
    early access
    DOI
  4. ION GNSS+
    Impact of dual-frequency multi-constellation GBAS data link constraints on integrity monitoring
    M. Caamano, D. Gerbeth, S. Saito, A. K. Sun, J. Lee, and 1 more author
    In Proc. ION GNSS+, Baltimore, MD, Sep 2025
    DOI
  5. ION GNSS+
    best_presentation_award_iongnss_2025.png
    A stochastic modeling approach for phase transition‑induced errors in GBAS under ionospheric scintillation
    A. K. Sun, J. Lee, M. Caamano, and S. Pullen
    In Proc. ION GNSS+, Baltimore, MD, Sep 2025
    Best Presentation Award DOI
  6. JGR Space Physics
    Do solar eclipse generate propagating ionospheric perturbations?
    A. K. Sun, H. Chang H. Kil, W. K. Lee, and J. Lee
    Journal of Geophysical Research: Space Physics, Sep 2025
    DOI
  7. ION ITM
    A method of estimating residual bending error in GNSS-RO absolute TEC
    J. Chang, A. K. Sun, J. Park, J. Lee, and J. Morton
    In Proc. ION ITM, Long Beach, CA, Jan 2025
    DOI

2024

  1. GRL
    Assessment of the origin of a plasma depletion band over the United States during the 8 September 2017 geomagnetic storm
    H. Kil, A. K. Sun, W. K. Lee, H. Chang, and J. Lee
    Geophysical Research Letters, Jan 2024
    DOI
  2. ION PNT
    Estimation of the residual error due to ionospheric bending in relative TEC using COSMIC-2 GPS-RO measurements
    J. Chang, A. K. Sun, J. Lee, H. Chang, Y. Wang, and 3 more authors
    In Proc. ION PNT, Honolulu, HI, Apr 2024
    DOI
  3. ION ITM
    A Method for Simulating Dynamic Ionosphere Scintillation
    A. Sun B. Breitsch and J. Morton
    In Proc. ION ITM, Long Beach, CA, Jan 2024
    DOI
  4. ION ITM
    Ionospheric scintillation effects across multiple carrier frequency bands transmitted from LEO satellites
    A. K. Sun, Y. J. Morton, and J. Lee
    In Proc. ION ITM, Long Beach, CA, Jan 2024
    DOI

2023

  1. Radio Science
    Statistical uncertainty in the frequency dependence of the intensity scintillation index (S4)
    A. K. Sun, X. Pi, C. Rino, and J. Lee
    Radio Science, Jan 2023
    DOI
  2. ION ITM
    Availability assessment of dual-frequency GNSS-based augmentation systems under equatorial ionospheric scintillations
    A. K. Sun, J. Chang, J. Lee, B. Breitsch, and Y. J. Morton
    In Proc. ION ITM, Long Beach, CA, Jan 2023
    DOI
  3. ION ITM
    Network-based augmentation system (NBAS) architectures optimized to support urban air mobility (UAM)
    J. Lee, G. Nam, D. Min, A. K. Sun, and S. Pullen
    In Proc. ION ITM, Long Beach, CA, Jan 2023
    DOI

2022

  1. ION GNSS+
    Networked UAV detection and alerting of ionospheric anomalies within LADGNSS navigation framework
    G. Nam, A. K. Sun, J. Lee, and S. Pullen
    In Proc. ION GNSS+, Denver, CO, Sep 2022
    DOI
  2. JGR Space Physics
    The origin of midlatitude plasma depletions detected during the 12 February 2000 and 29 October 2003 geomagnetic storms
    H. Kil, H. Chang, W. K. Lee, L. J. Paxton, A. K. Sun, and 1 more author
    Journal of Geophysical Research: Space Physics, Sep 2022
    DOI
  3. JGR Space Physics
    Ionospheric disturbances in low- and midlatitudes during the geomagnetic storm on 26 August 2018
    H. Chang, H. Kil, A. K. Sun, S.-R. Zhang, and J. Lee
    Journal of Geophysical Research: Space Physics, Sep 2022
    DOI

2021

  1. Space Weather
    Markov chain-based stochastic modeling of deep signal fading: Availability assessment of dual-frequency GNSS-based aviation under ionospheric scintillation
    A. K. Sun, H. Chang, S. Pullen, H. Kil, J. Seo, and 2 more authors
    Space Weather, Sep 2021
    DOI

2020

  1. ION ITM
    Performance benefit from dual-frequency GNSS-based aviation applications under ionospheric scintillation: A new approach to fading process modeling
    A. K. Sun, H. Chang, J. Lee, J. Seo, Y. J. Morton, and 1 more author
    In Proc. ION ITM, San Diego, CA, Jan 2020
    DOI