To benefit society by promoting the development and realization of Digital Earth
On July 3rd, 2023, the 5th ISDE International Lectures ended successfully with thought-provoking results. Three speakers drew the lecture attendees' attention to the theme of "Optical Quantum Vector Observations of the Digital Earth" for the first time and expanded on key notions like vector remote sensing, multi-angular satellite polarimetry, and meteorite recovery, etc. Their well-sourced presentations and extensive illustrations presented a fresh perspective on Digital Earth.
Lei Yan, Professor of the School of Earth and Space Science, Peking University, gave a lecture themed "Digital Earth source: 3D vector remote sensing mechanism and its optical quantum resolution". He finished his lead-in part with three intriguing theories. The first theory is the quantum-based vector remote sensing, the second is the ground molecular detect with vector remote sensing, and the third focuses on the national major needs like the food security issue and air pollution monitoring. Then, he kept the attendees in the picture about the frontier technologies and unique vector remote sensing instruments needed in the Earth observations, as well as the latest engineering development. He ended his lecture with a brief introduction to the new progress achieved by his team in the field of remote sensing science and technology.
Oleg Dubovik, CNRS "Research Director" in the Laboratoire d'Optique Atmosphérique, Université Lille, France, engrossed the audience with a presentation themed "The potential of the characteristics of Earth atmosphere and surface using multi-angular satellite polarimetry". He first indicated that the multi-angular polarimetric observation is considered as one of probably the most powerful observations for monitoring the atmospheric particulate pollution. By showing some illustrations of the most-known satellite polarimetry missions already existing in space, he believed that in the future, more such monitoring properties will heavily rely on the multi-angular polarimetric observation. He then elaborated the polarization state of the light scattered by aerosols and convinced the audience with a couple of equations. He pointed out that one of the main difficulties of all satellite observations is to distinguish aerosol contributions in order to characterize atmosphere. Though faced with challenges, the polarimetry, in his opinion, is expected to bring important correction aerosol climatology and other findings.
Maria Gritsevich, Senior Scientist at University of Helsinki, Finland, gave a lecture on "Meteor phenomena in the atmosphere". First and foremost, she imparted several basic definitions such as the definition of meteoroid, meteor, fireball, etc. to the attendees to assist them in better following her presentation. In her part, she presumed that the meteorite (fall) recovery is exciting since it is a cheap analogue to, or almost free complementary approach for, the sample return mission organized by space agencies. With a detailed case analysis, she unveiled the fundamental equation and its corresponding key dimensionless parameters used to better understand the meteorite recoveries.
The 5th ISDE International Lectures was moderated by Wei Chen, Associate Professor of China University of Mining & Technology, Beijing. Over 4,200 participants around the world attended the 5th Lectures through Zoom, ISDE Bilibili platform and other academic streaming platforms.
The ISDE International Lectures are organized by the International Society for Digital Earth (ISDE) and supported by the International Research Center of Big Data for Sustainable Development Goals (CBAS). It is a series of online events which feature invited lectures by well-known international experts in the field of Digital Earth. The event will invite speakers to give lectures every two months. The purpose of the events is to bring international scholars in the relevant research fields of Digital Earth together to exchange academic perspectives, share research results, and disseminate the most cutting-edge and authoritative concept of Digital Earth.