Dr. Yoke Yoon is an accomplished aerospace engineer with over 20 years of experience in the industry. She holds a Ph.D. in Aerospace Engineering Sciences from the University of Colorado Boulder, where she focused on satellite navigation and orbit determination. She also holds a Master of Science in Mechanical and Aerospace Engineering from the University of Missouri and a Bachelor of Science in Aerospace Engineering from Iowa State University. Dr. Yoon has worked in various roles and organizations throughout her career, including as a Visiting Scientist at NASA/Jet Propulsion Laboratory and a GPS Research Scientist at the German Space Operations Center. She has also served as a Senior Engineer and Technical Project Manager at Deimos S.L.U., a Low Earth Orbit Precise Orbit Determination Specialist at Positim U.G. at EUMETSAT, and a Satellite Navigation Consultant at Positim U.G. In addition, Dr. Yoon has held positions at the University Corporation for Atmospheric Research (UCAR) as a Project Scientist II, at Hemisphere GNSS as a Precise GNSS R&D Network Manager, and at OneWeb as the Director of Flight Dynamics Engineering. She is currently the Founder and Principal Consultant at GlobaNav Solutions LLC, where she provides consulting services in satellite navigation, orbit determination, and flight dynamics. Dr. Yoon's expertise and contributions to the field of aerospace engineering have been recognized through numerous awards and publications. She was a member of several professional organizations, including the American Institute of Aeronautics and Astronautics (AIAA) and the Institute of Navigation (ION). She is also a licensed Professional Engineer (PE) in the state of Colorado.

Yoke Yoon, Ph.D.

Passionate about leveraging my expertise in the space/satellite technology industry to provide superior technical and management consulting services that foster growth, sustainability and innovation for clients

Research Interests

Aerospace Engineering

Safety, Risk, Reliability and Quality

Geophysics

Electrical and Electronic Engineering

Oceanography

About

Publications

Navigating a large satellite constellation in the new space era: An operational perspective

Journal of Space Safety Engineering / Dec 01, 2023

Yoon, Y. T., Ghezzo, P., Hervieu, C., & Palomo, I. D.-A. (2023). Navigating a large satellite constellation in the new space era: An operational perspective. Journal of Space Safety Engineering, 10(4), 531–537. https://doi.org/10.1016/j.jsse.2023.10.006

Sensing Heavy Precipitation With GNSS Polarimetric Radio Occultations

Geophysical Research Letters / Jan 22, 2019

Cardellach, E., Oliveras, S., Rius, A., Tomás, S., Ao, C. O., Franklin, G. W., Iijima, B. A., Kuang, D., Meehan, T. K., Padullés, R., de la Torre Juárez, M., Turk, F. J., Hunt, D. C., Schreiner, W. S., Sokolovskiy, S. V., Van Hove, T., Weiss, J. P., Yoon, Y., Zeng, Z., … Cerezo, F. (2019). Sensing Heavy Precipitation With GNSS Polarimetric Radio Occultations. Geophysical Research Letters, 46(2), 1024–1031. Portico. https://doi.org/10.1029/2018gl080412

GPS clock correction estimation for near real-time orbit determination applications

Aerospace Science and Technology / Oct 01, 2009

Bock, H., Dach, R., Yoon, Y., & Montenbruck, O. (2009). GPS clock correction estimation for near real-time orbit determination applications. Aerospace Science and Technology, 13(7), 415–422. https://doi.org/10.1016/j.ast.2009.08.003

TerraSAR-X Precise Trajectory Estimation and Quality Assessment

IEEE Transactions on Geoscience and Remote Sensing / Jun 01, 2009

Yoon, Y. T., Eineder, M., Yague-Martinez, N., & Montenbruck, O. (2009). TerraSAR-X Precise Trajectory Estimation and Quality Assessment. IEEE Transactions on Geoscience and Remote Sensing, 47(6), 1859–1868. https://doi.org/10.1109/tgrs.2008.2006983

Antenna phase center calibration for precise positioning of LEO satellites

GPS Solutions / Jun 07, 2008

Montenbruck, O., Garcia-Fernandez, M., Yoon, Y., Schön, S., & Jäggi, A. (2008). Antenna phase center calibration for precise positioning of LEO satellites. GPS Solutions, 13(1), 23–34. https://doi.org/10.1007/s10291-008-0094-z

Tracking and orbit determination performance of the GRAS instrument on MetOp-A

GPS Solutions / Apr 09, 2008

Montenbruck, O., Andres, Y., Bock, H., van Helleputte, T., van den Ijssel, J., Loiselet, M., Marquardt, C., Silvestrin, P., Visser, P., & Yoon, Y. (2008). Tracking and orbit determination performance of the GRAS instrument on MetOp-A. GPS Solutions, 12(4), 289–299. https://doi.org/10.1007/s10291-008-0091-2

The Effects of GPS Carrier Phase Ambiguity Resolution on Jason-1

Marine Geodesy / Jul 01, 2004

YOON, Y. T., NEREM, S. R., WATKINS, M. M., HAINES, B. J., & KRUIZINGA, G. L. (2004). The Effects of GPS Carrier Phase Ambiguity Resolution on Jason-1. Marine Geodesy, 27(3–4), 773–787. https://doi.org/10.1080/01490410490889058

Improved elevation-change measurement of the southern Greenland ice sheet from satellite radar altimetry

IEEE Transactions on Geoscience and Remote Sensing / May 01, 2000

Davis, C. H., Kluever, C. A., Haines, B. J., Perez, C., & Yoon, Y. T. (2000). Improved elevation-change measurement of the southern Greenland ice sheet from satellite radar altimetry. IEEE Transactions on Geoscience and Remote Sensing, 38(3), 1367–1378. https://doi.org/10.1109/36.843031

Mechanism for hydrogen diffusion in amorphous silicon

Physical Review B / Jan 15, 1998

Biswas, R., Li, Q., Pan, B. C., & Yoon, Y. (1998). Mechanism for hydrogen diffusion in amorphous silicon. Physical Review B, 57(4), 2253–2256. https://doi.org/10.1103/physrevb.57.2253

Dangling-bond levels and structure relaxation in hydrogenated amorphous silicon

Physical Review B / Oct 15, 1997

Biswas, R., Li, Q., Yoon, Y., & Branz, H. M. (1997). Dangling-bond levels and structure relaxation in hydrogenated amorphous silicon. Physical Review B, 56(15), 9197–9200. https://doi.org/10.1103/physrevb.56.9197

Education

University of Colorado Boulder

Ph.D., Aerospace Engineering Sciences / August, 2004

Boulder, Colorado, United States of America

University of Missouri

M.Sci., Mechanical and Aerospace Engineering / December, 1998

Columbia, Missouri, United States of America

Iowa State University

B.Sci., Aerospace Engineering / December, 1996

Ames, Iowa, United States of America

Experience

NASA/Jet Propulsion Laboratory

Visiting Scientist / June, 2002 — August, 2002

Studied the significance of integer GPS carrier phase ambiguity resolution technique to a single low Earth orbiting satellite in an effort to improve on the positioning accuracy using a Square Root Information Filter (SRIF) based software

German Space Operations Center

GPS Research Scientist and Flight Dynamics Analyst / August, 2004 — March, 2008

Performed feasibility studies and designed satellite orbit determination system for ESA Sentinel-3 satellite mission. Was the sole responsible for all real-time operational positioning research and analysis, developed software tools for product validation, supported flight dynamics monitoring, and calibrated satellite maneuvers for mission analysis and planning.

Deimos S.L.U.

Senior Engineer and Technical Project Manager / April, 2008 — December, 2010

Led the development of real-time navigation software for a satellite mission to Mars, designed a GNSS orbit and clock determination software prototype, implemented an Unscented Kalman filter for satellite navigation, supervised engineers in building a navigation simulation platform, and supported the management team in technical proposal development.

Positim U.G. at EUMETSAT

Low Earth Orbit Precise Orbit Determination Specialist / January, 2011 — June, 2016

Responsible for introducing improvements to operational precise point estimation (PPE) system/engine, developing a multi-mission precise PPE system architecture, maintaining software tools for monitoring and GNSS data analysis, collaborating with satellite missions for accuracy improvements, supervising software development for file management, assessing satellite maneuver calibration impact, participating in calibration activities, leading receiver performance assessments, and presenting analysis results at conferences and workshops.

Positim U.G.

Satellite Navigation Consultant / July, 2016 — November, 2016

Studied the impact of LEO satellite GPS data quality on a combined GPS and LEO precise positioning solution.

University Corporation for Atmospheric Research (UCAR)

Project Scientist II / November, 2016 — June, 2019

Conducted research on GNSS-based precise positioning estimation for LEO satellites, provided technical expertise to science teams, developed and maintained GNSS software tools, collaborated with external organizations, improved system functionality, conducted software tests, enhanced post-processing systems, led receiver performance assessments, investigated machine learning applications, and provided training on the PPE system.

Hemisphere GNSS

Precise GNSS R&D Network Manager / June, 2019 — August, 2021

Responsible for planning, organizing, and directing engineering developments in GNSS positioning and timing estimation, leading an engineering team in software development, managing project collaborations and contracts, delivering project plans and technical reports, overseeing software development tools, transitioning to Gitlab for version control, providing technical expertise in navigation, conducting root cause analysis, documenting system and software requirements, and managing technical staff hiring and training.

OneWeb

Director, Flight Dynamics Engineering / September, 2021 — December, 2023

Directed flight dynamics operations, managed satellite maneuver planning and monitoring, oversaw the implementation of operational procedures, led a restructuring of operational documents, supervised personnel in GPS and orbit modeling, supported space situational awareness efforts, developed project management processes, managed external contracts, recruited and retained personnel, conducted staff evaluations, led technical discussions, contributed to calibration campaigns, and supported technology development for OneWeb's satellites and PNT activities.

GlobaNav Solutions LLC

Founder and Principal Consultant / January, 2024 — Present

Deliver expert consultation services in technical analysis, software development and management for precision location and navigation techniques for space based missions, GNSS, LEO positioning, navigation and timing (PNT), space and ground systems requirements definition, architecture implementation, (sub-)system verification and validation, early phase proof-of-concept satellite mission studies, as well as sub-systems engineering.

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