About
The GEMS International Workshop is a premier annual forum dedicated to sharing the operational achievements and scientific advancements of the Geostationary Environment Monitoring Spectrometer (GEMS). Since its launch, the workshop has focused on enhancing air quality monitoring capabilities across Asia and ensuring that satellite data provides valuable insights for environmental policy and forecasting. By fostering collaboration with international partners, the workshop plays a central role in advancing the global Geo-ring constellation, a collaborative international network of geostationary satellites dedicated to continuous air quality monitoring across the Northern Hemisphere.
The 17th GEMS International Workshop will be held from 9 to 11 September 2026 at the RYSE Hotel in Seoul. This year’s meeting focuses on the maturity of GEMS data products, highlighting advanced algorithm updates and long-term validation results derived from the Pandora Asia Network (PAN) and recent field campaigns. Key sessions will explore the synergy between geostationary missions, AI-driven data analysis, and the integration of satellite observations into air quality models. We invite researchers and experts from around the world to join us in discussing the present and future of space-based air quality monitoring.
- Registration
- Deadline: 30 June 2026
- Note: Early registration is recommended due to limited seating at the venue.
For any inquiries, please contact namtion@korea.kr.
Agenda
Below is the oral presentation agenda for the 17th GEMS International Workshop. Presentation slides from speakers who agreed to share their materials can be downloaded by clicking on the respective presentation titles.
For any inquiries, please contact namtion@korea.kr.
17th GEMS International Workshop
| Local Time (UTC+9) | Title | Speaker |
|---|---|---|
| 09:00 - 10:00 | Registration | |
| Opening | ||
| 10:00 - 10:05 | Opening Remarks | Jiwon Seong (Director General, Atmospheric Environmental Research Department, NIER) |
| 10:05 - 10:10 | V(Pre-recorded Video) Congratulatory Remarks | Timon Hummel (European Space Agency) |
| Keynote Presentation (Chair: Hye Jung Shin, ESC Director) | ||
| 10:10 - 10:30 | History, Achievements, and Future Recommendations for the GEMS Satellite Program from an Environmental and Climate Policy Perspective | Minho Lee (Former Deputy Minister, Ministry of Environment) |
| 10:30 - 10:50 | TEMPO Mission Status | Xiong Liu (CfA | Harvard & Smithsonian) |
| 10:50 - 11:10 | Sentinel-4 Level-2 Overview | Diego Loyola (German Aerospace Center) |
| 11:10 - 11:30 | GEMS: Over 5 years of Operation, Achievements, and Issues | Jhoon Kim (Yonsei Univ., Max Planck Institute) |
| 11:30 - 11:40 | Group Photo | |
| 11:40 - 13:00 | Lunch | |
| Session 1: The Status of GEMS (Chair: Won-Jin Lee) | ||
| 13:00 - 13:15 | GEMS INR Overview and L1B Accuracy Analysis | Jaehoon Jeong(NIER) |
| 13:15 - 13:30 | Recent Advances and Ongoing Improvements in the GEMS SFC Algorithm | Seungwon Kim(Pukyong National Univ.) |
| 13:30 - 13:45 | GEMS LIB characteristics and updates | MyoungHwan Ahn(Ewha Womans Univ.) |
| 13:45 - 14:00 | Update of GEMS VOC products | Rokjin Park(Seoul National Univ.) |
| 14:00 - 14:15 | Summary of GEMS NO2 Updates and Plans for Tropospheric Accuracy Improvement | Hanlim Lee(Pukyong National Univ.) |
| 14:15 - 14:30 | Cloud retrieval algorithm | Yong-Sang Choi(Ewha Womans Univ.) |
| 14:30 - 14:45 | Assessment of the GEMS SO2 v3.0 Product and Ongoing Improvements | Jeonghyeon Park(Pukyong National Univ.) |
| 14:45 - 15:00 | Development and Evaluation of GEMS AOD Version 3.0 | Yujin Chai(Yonsei Univ.) |
| 15:00 - 15:15 | Coffee Break | |
| Session 2: GEO-Ring (Chair: Rokjin Park) | ||
| 15:15 - 15:30 | Improved NO2 column retrievals for geostationary satellites: application to GEMS and TEMPO | Sora Seo(German Aerospace Center) |
| 15:30 - 15:45 | The Status of the V04 TEMPO Total-Ozone and Ozone-Profile Algorithm: Updates and Evaluations | Junsung Park(CfA | Harvard & Smithsonian) |
| 15:45 - 16:00 | Evaluation of GEMS total ozone within the ESA PEGASOS project | Katerina Garane(Aristotle Univ. of Thessaloniki) |
| 16:00 - 16:15 | GEMS-2 Mission Preparation | Won-Jin Lee(NIER) |
| 16:15 - 16:30 | R(Remote Live) TEMPO Level 1 Status | Heesung Chong(CfA | Harvard & Smithsonian) |
| 16:30 - 16:45 | R(Remote Live) Validation of GEMS operational products within the Geo-Ring project | Arno Keppens(BIRA-IASB) |
| 16:45 - 17:00 | R(Remote Live) Overview of the PEGASOS project | Ronny Lutz(German Aerospace Center) |
| 17:00 - 18:00 | Poster Session & Coffee Break | |
| 18:00 - 20:00 | Welcome Reception | |
| Local Time (UTC+9) | Title | Speaker |
|---|---|---|
| Session 3: Validation of Satellite Data (Chair: Xiong Liu) | ||
| 09:00 - 09:15 | Evaluation and interpretation of GEMS glyoxal products | Xingyi Wu(Southern Univ. of Science and Technology) |
| 09:15 - 09:30 | Evaluation of the GEMS ozone diurnal cycle using ground-based ozone observations over Korea | Joowan Kim(Kongju National Univ.) |
| 09:30 - 09:45 | Interpreting GEMS geostationary satellite observations of the diurnal variation of nitrogen dioxide (NO2) over Tibetan Plateau | Xue Zhang(Southern Univ. of Science and Technology) |
| 09:45 - 10:00 | The current status of GEMS total ozone and ozone profile | Jaehwan Kim(Pusan National Univ.) |
| 10:00 - 10:15 | Validation of NO2 tropospheric vertical column density from GEMS version 4.0 using MAX-DOAS observations over Korea | Yongjoo Choi(Hankuk Univ. of Foreign Studies) |
| 10:15 - 10:30 | GEMS NO2 evaluation over Beijing using Pandora data as reference | Cheng Fan(Aerospace Information Research Institute, CAS) |
| 10:30 - 10:45 | International Air quality and SKY research remote sensing network (A-SKY): recent activities and results | Hitoshi Irie(Chiba Univ.) |
| 10:45 - 11:00 | R(Remote Live) Passive remote sensing of aerosol vertical distribution: theory, first results, and implications for TEMPO and GMES | Jun Wang(Univ. of Iowa) |
| 11:00 - 13:00 | Lunch | |
| Session 4: Applications of Satellite Data I (Chair: Sang Seo Park) | ||
| 13:00 - 13:15 | Analysis of Air Quality Fluctuations in Major Asian Cities Based on GEMS | Changsuk Lee(NIER) |
| 13:15 - 13:30 | Chinese AI-enhanced Satellite and Drone Remote Sensing for Atmospheric Trace Gases | Cheng Liu(Univ. of Science and Technology of China) |
| 13:30 - 13:45 | Application of GEMS data to the air quality diagnosis in Southeast Asia | Ja-Ho Koo(Yonsei Univ.) |
| 13:45 - 14:00 | R(Remote Live) Integrating GEMS Observations with Machine Learning for Surface Air Quality Monitoring of NO2 and O3 | Naveed Ahmad(HKUST) |
| 14:00 - 14:15 | V(Pre-recorded Video) ASDC's Advanced Tools for Wildfire Monitoring Using TEMPO | Hazem Mahmoud(NASA) |
| 14:15 - 14:50 | Coffee Break | |
| Session 5: Applications of Satellite Data II (Chair: Ja-Ho Koo) | ||
| 14:50 - 15:05 | Enhanced Monitoring of Volcanic Emissions with the Geostationary UV Satellite Constellation | Simon Carn(Michigan Technological Univ.) |
| 15:05 - 15:20 | Estimates of CO2 and CH4 emissions from satellite retrievals and atmospheric transport model | Yusheng Shi(Aerospace Information Research Institute, CAS) |
| 15:20 - 15:35 | Recent Limb Observations of Atmospheric Profiles from Chinese Satellites | Chengxin Zhang(Univ. of Science and Technology of China) |
| 15:35 - 15:50 | Understanding the role of local transport in the diurnal variability of NO2 over the Seoul Metropolitan Area | Seunghwan Seo(Yonsei Univ.) |
| 15:50 - 16:05 | Application of GEMS NO2 data for surface pollution and emission estimates | Jintai Lin(Peking Univ.) |
| 16:05 - 16:20 | Diurnal Evolution of Ozone Production Regimes over East Asia: Insights from Geostationary GEMS HCHO and NO2 Observations | Yohan Yang(Rutgers Univ.) |
| 16:20 - 16:40 | Coffee Break | |
| 5th Pandora Asia Network (PAN) Workshop | ||
| 16:40 - 16:45 | Opening Remarks | Hye Jung Shin(Director, ESC, NIER) |
| 16:45 - 16:50 | Congratulatory Remarks | Kiyoung Ko(UNESCAP) |
| Session 6: Pandora Asia Network I (Chair: Hanlim Lee) | ||
| 16:50 - 17:00 | PAN status and future plan | Suna Shin(NIER) |
| 17:00 - 17:10 | Pandora, AERONET, and SKYNET Data-Driven Multi-Geostationary Satellite Data Fusion and Calibration | Beomgeun Jang(UNESCAP) |
| 17:10 - 17:20 | [Thailand] Pandora and Satellite NO2 Observations: A Comparative Study of Chiang Mai and Bangkok | Chomsri Choochuay(Prince of Songkla Univ.) |
| 17:20 - 17:30 | [Mongolia] Evaluation of GEMS Aerosol and Trace Gas Products over Southern Mongolia Using AERONET, Pandora, and Ground-Based Air Quality Observations | Tserenchunt Battumur(IRIMHE) |
| 17:30 - 17:40 | R(Remote Live) [Indonesia] Assessing the Capability of GEMS to Detect Forest-Fire Signals over Kalimantan, Indonesia | Risyanto(BRIN) |
| Local Time (UTC+9) | Title | Speaker |
|---|---|---|
| Session 7: Pandora Asia Network II (Chair: Ukkyo Jeong) | ||
| 09:00 - 09:10 | [Philippines] Pandora measurements from Navotas Sanitary Landfill Facility fires | Sherdon Niño Uy(Manila Observatory) |
| 09:10 - 09:20 | [Lao PDR] GEMS_based Near Real_Time Air Pollution Monitoring in Lao PDR | Virasith Phomsouvanh(MAE) |
| 09:20 - 09:30 | [Cambodia] Current Status of Remote Sensing and Air Quality Data Utilization in Cambodia | Sokyimeng Sam(Ministry of Environment) |
| 09:30 - 09:40 | [Singapore] Impact of Meteorology on Air Pollution in Southeast Asia: Pandora and GEMS Observations | Fernando Santos(NUS) |
| 09:40 - 09:55 | Coffee Break | |
| Session 8: GHG Monitoring Missions (Chair: Kyung-Jung Moon) | ||
| 09:55 - 10:10 | Current Status of NIER GHG Mission | Ukkyo Jeong(Pukyong National Univ.) |
| 10:10 - 10:25 | TANGO The Twin Anthropogenic Greenhouse Gas Observers Mission | Jochen Landgraf(SRON) |
| 10:25 - 10:40 | MERLIN and CO2Image | Diego Loyola(German Aerospace Center) |
| 10:40 - 10:55 | The MethaneSAT mission | Sébastien Roche(EDF) |
| 10:55 - 11:10 | Carbon Mapper: Tanager-1 Greenhouse Gas Measurement Performance and Science Highlights | Jinsol Kim(CarbonMapper) |
| Closing | ||
| 11:10 - 11:20 | Award Ceremony for the GHG CubeSat Naming Contest | Jiwon Seong (Director General, Atmospheric Environmental Research Department, NIER) |
| 11:20 - 11:25 | Closing Remarks | |
Posters
Below is the list of poster presentations for the 17th GEMS International Workshop. Please note that the list is subject to change. We recommend checking the latest update date prior to the event.
For any inquiries, please contact namtion@korea.kr.
(Last updated: 21 August 2026)
Venue
The 17th GEMS International Workshop will be held at RYSE, Autograph Collection, located in the vibrant heart of Hongdae, Seoul.
- Location: 130 Yanghwa-ro, Mapo-gu, Seoul, 04038
- Subway: Hongik University Station (Line 2, AREX, Gyeongui-Jungang Line) - Exit 9 (3-minute walk)
- From Incheon Airport (ICN):
- Airport Railroad (AREX): Take the All-stop train to Hongik Univ. Station.
- Limousine Bus: Take bus No. 6002 and get off at the Hongik Univ. Station stop.
- Parking: Valet parking is available for guests, though public transportation is highly recommended due to city traffic.
Photos
