News | Hanjoon Shim | 심한준

Attending ION GNSS+ 2026

Sat, 05 Sep 2026 00:00:00 +0000

Just a few days to go until ION GNSS+ 2026!

I’m excited to attend ION GNSS+ 2026 in Orlando, which will be my first ION conference since completing my Ph.D.

I’ll be presenting my postdoctoral research:

“Toward an Asteroid-Based Autonomous Navigation Framework for Deep Space CubeSats” in the E2b: Novel Paradigms in Navigation session.

This work explores an autonomous absolute navigation framework using asteroids as natural navigation references, with the aim of investigating the future feasibility of asteroid-based navigation for deep-space missions.

I’m looking forward to meeting colleagues in the ION community and discussing current topics in LEO PNT, RTK, autonomous navigation, deep-space PNT, and small-spacecraft missions.

See you in Orlando!

A New Look for My Website

Sat, 29 Aug 2026 00:00:00 +0000

I have refreshed my personal website with a new design and a clearer structure for sharing my research, publications, projects, and updates.

The site will continue to grow alongside my work, future collaborations, and lab activities. I hope you enjoy exploring the new version.

Farewell and New Beginning

Wed, 01 Oct 2025 00:00:00 +0000

From March 2017 to September 2025, I have been part of the GNSS Laboratory at Seoul National University, completing my graduate studies and concluding my journey as a postdoctoral researcher.

I am deeply grateful to Prof. Changdon Kee, whose pioneering Ph.D. work on Wide-Area DGPS (WADGPS) laid the groundwork for what became today’s Satellite-Based Augmentation Systems (SBAS). His invaluable guidance has shaped my growth as a researcher, and I also extend my sincere thanks to all my colleagues for their companionship and support throughout these years.

In particular, I wish for the successful launch of SNUGLITE-III CubeSat scheduled on November 27, 2025. 🚀

This October, I begin my new chapter as a Postdoctoral Researcher in Mechanical and Aerospace Engineering at the University of Liverpool, joining Dr Stefania Soldini’s research group. My research will focus on Guidance, Navigation, and Control (GNC) for asteroid missions under the #REMORA project.

I look forward to this new stage of life, and I hope to continue building meaningful collaborations at future conferences and beyond.

Environmental Testing Completed for SNUGLITE-III CubeSat!

Fri, 27 Jun 2025 00:00:00 +0000

From June 18 to 27, 2025, launch vibration and thermal vacuum tests were completed at the KTL in Jinju, Korea, as part of final pre-launch preparations. SNUGLITE-III is scheduled to launch aboard the Nuri rocket from the Naro Space Center in late November.

The CubeSat features:

The first in-orbit demonstration of GPS RTK relative navigation
Autonomous rendezvous and docking without propulsion
A GPS-based attitude determination system designed for CubeSats

Grateful to take part in this mission advancing the frontiers of CubeSat technology. Still a long road ahead, but each milestone brings us closer to space.

IEEE Aerospace Conference 2025 (Big Sky)

Thu, 06 Mar 2025 00:00:00 +0000

I attended the 2025 IEEE Aerospace Conference held in Big Sky, Montana. It was an excellent conference with many insightful discussions and presentations.

I presented the following paper:

Personal Homepage Released

Tue, 15 Oct 2024 00:00:00 +0000

I’m excited to announce that my research website is now live!

The site serves as a hub for sharing updates on my projects, publications, and other academic activities. This platform is designed to showcase my work in spacecraft navigation and CubeSat technologies, with the goal of connecting with fellow researchers and enthusiasts in the field. Feel free to explore, and I’d love to hear your feedback!

Announce my graduation with a Doctorate in Aerospace Engineering

Sat, 31 Aug 2024 00:00:00 +0000

I am honored to announce my graduation with a Doctorate in Aerospace Engineering. With profound gratitude for the support and knowledge I have gained, I remain steadfast in my commitment to the principle of “learning and sharing with others.”

My doctoral dissertation, “Precise GPS Relative Navigation for CubeSat Rendezvous,” delves into the development of RTK-based relative navigation techniques, achieving centimeter-level accuracy for GPS in LEO. This work has successfully demonstrated the application of these advanced techniques to CubeSats. The algorithms, meticulously coded in C within a Real-Time Operating System environment, highlight my proficiency in embedded systems, ensuring rapid computation and reliable centimeter-level GPS-based relative navigation. These innovations will be demonstrated in the SNUGLITE-III CubeSat mission, scheduled for launch in November 2025. Currently, I am fully dedicated to finalizing the SNUGLITE-III project to ensure its successful execution.

As I look towards the future, I am actively seeking a postdoctoral position starting in mid-2025. I bring demonstrated expertise in the following areas:

GPS Applications in LEO
RTK Relative Navigation
CubeSat Technologies
Attitude and Orbit Control Systems (AOCS)
Hardware-in-the-loop Simulation (HILS)

My CV is readily available upon request, and I am eager to explore opportunities where I can contribute my skills and knowledge to cutting-edge projects.

Research Blog on Jul 05, 2024

Fri, 05 Jul 2024 00:00:00 +0000

For this project, an Engineering Model (EM) of the Interstage GSSB was developed. This design replicates all the functions of the Gomspace Interstage GSSB. Since our team only ordered a limited number of Flight Models (FM), an EM was necessary for testing purposes, as additional FM units were too costly. To facilitate rapid development, I designed the EM to be Arduino-compatible and implemented all protocols to match those of the Gomspace FM. Since this panel does not need to operate in space, it is ideal for flight software testing.

ION ITM 2024 (Long Beach)

Wed, 24 Jan 2024 00:00:00 +0000

Thrilled to share my experiences from the ION ITM 2024 conference! I had the honor of presenting on the topic “Verification and Hardware Implementation of Single-Frequency RTK-Based Precise Relative Navigation for SNUGLITE-III CubeSat.” This presentation extends the discussion from the paper presented at the ION GNSS+ conference last September, focusing on performance verification using real-world data. Excitingly, our research team submitted the results to ION Navigation, and it’s currently under review, showcasing the potential for cm-level relative navigation using a cube satellite with a single-frequency GPS receiver.

A definite highlight was the opportunity to connect with a diverse range of individuals at the conference, especially during the engaging Student Social Event at the ION conference. It provided a platform for insightful interviews with fellow students, enriching my overall experience.

Although my initial plan was to attend ION GNSS+ 2024, unforeseen circumstances led me to participate in IAC 2024 in October. Unfortunately, our team will be divided among labs, and other students will represent us in our meeting with the ION Society. To those attending IAC 2024, I eagerly anticipate connecting at the small satellite-related symposium, where I’ll be presenting my findings.

Great to have met everyone. I hope to see you again next time.

Research Blog on Dec 08, 2023

Fri, 08 Dec 2023 00:00:00 +0000

Overview

Fit to Standard 3U Size CubeSats
Two series-connected AzurSpace 3G30A solar cells
Sun sensor and temperature sensor on a single PCB 1.2mm thick (Gomspace Interstage GSSB is compatible)

In the SNUGLITE-III project, one of the main focus (to reduce budget) was on the fabrication of the solar panels for the CubeSat. I was solely responsible for the entire process, from PCB design to fabrication. Using Gomspace products as a benchmark, I ensured that all the solar panels were compatible and could integrate seamlessly with the system. Additionally, I verified the functionality of the panels through vacuum testing and solar simulator experiments, confirming that they performed as expected.

ION GNSS+ 2023 (Denver, USA)

Thu, 14 Sep 2023 00:00:00 +0000

A little late, but I’m excited to share the news that I received the Best Presentation Award at the ION GNSS+ 2023 conference in September.

This was my first time attending the ION GNSS+, and I was honored to be recognized for my work. My presentation was on a topic that I am passionate about, and I was glad to have the opportunity to share my research with a wider audience.

I received a lot of positive feedback from attendees, and I was able to connect with many people who are working in the same field. I am grateful for the opportunity to have attended this prestigious event, and I look forward to continuing my research in the field of GNSS.

Announce my graduation with a Master in Aerospace Engineering

Tue, 26 Feb 2019 00:00:00 +0000

ION ITM/PTTI 2018 (Reston, Virginia)

Tue, 30 Jan 2018 00:00:00 +0000

Announce my graduation with a Bachelor in Mechanical and Control Engineering

Fri, 17 Feb 2017 00:00:00 +0000