Conferences
The 60th lecture of Shijian Forum Was Successfully Held
Source： | Date：2019-10-21 | 【Print】 【Close】
On the afternoon of October 16, 2019, the 60th lecture of the Shijian Forum of the State Key Laboratory of Resources and Environmental Information System was held in Room A0214, Institute of Geographic Sciences and Natural Resources Research (IGSNRR), Chinese Academy of Sciences (CAS). Research professor Jean-Louis Roujean of the French Academy of Sciences gave a report entitled "Analysis of TIR directional effects for preparing the future satellite mission TRISHNA". Inviter Tang Bohui presided over the forum. Researchers and postgraduates from IGSNRR, the Aerospace Information Research Institute of CAS, the University of CAS, the Chinese Academy of Forestry, Beijing Normal University, China University of Geosciences and other units participated in the forum.
At the forum, Researcher Jean-Louis Roujean detailed the urgent needs, scientific mission, load performance and thermal application prospects of the TRISHNA project (Thermal infraRed Imaging Satellite for High resolution Natural resource Assessment). TRISHNA carries sensors with high spatial resolution (50 m), high revisit period (3 crossings every 8 days), global coverage, and rich bands (4 thermal infrared channels and 6 visible light channels), wide field of view (35°), and especially, the full ability to measure the hotspot phenomenon. He, then, presented his recent works on the angular correction of thermal radiation using the parametric model RL, one-dimensional model SCOPE and three-dimensional model DART. Besides, he introduced a new hotspot model based on the relationship between directional thermal radiation and visible light information. After the report, participants had in-depth discussions on issues of proximity effect of surface temperatures at a high spatial resolution, differences between visible light and thermal radiation, hotspot effects of aggregation index, validation of the new hotspot model, scale effects of directional emissivity, etc.
Jean-Louis Roujean is a research professor of the French Academy of Sciences and the French Biosphere Space Science Center. He is also the chairman of the French Research Committee on Surface Space Science, and the chief scientist of the French-Indian satellite project TRISHNA. He received his Ph.D. in 1991 from the Third University of Toulouse in France. He successively worked at the French Space Agency, the French Meteorological Research Center, and the French Biosphere Space Science Center. He was the deputy director of the French Meteorological Research Center. His main research interests include multi-scale surface bidirectional reflection modeling, radiation flux estimation, data fusion and assimilation, and remote sensing of vegetation ecosystems. He has published more than 80 academic papers, and the kernel drive model he proposed (cited over 1100 times) has been widely used in the product generation of, such as, MODIS, POLDER, MERIS, VEGETATION, METEOSAT, PROBA-V.
Presentation by Jean-Louis Foujean