系列报告题目二：Reflectometry using GNSS-R and other Signals of Opportunity: A new paradigm for Earth Observation – Part II: Applications
报告人：Prof. Adriano Camps
加泰罗尼亚理工大学 (Universitat Politècnica de Catalunya)
腾讯会议：ID：799 3762 5132
会议邀请单位：中国矿业大学环境与测绘学院 (China University of Mining and Technology, School of Environment Science and Spatial Informatics)
Programme: 高等学校学科创新引智计划项目 (111 Plan Project)
Although originally designed for navigation, signals from the Global Navigation Satellite Systems (GNSS), i.e., GPS, GLONASS, Galileo and Beidou, exhibit strong reflections from the Earth and ocean surface. Effects of rough surface scattering modify the properties of reflected signals. Several methods have been developed for inverting these effects to retrieve geophysical data such as ocean surface roughness (winds) and soil moisture. Extensive sets of airborne GNSS reflectometry (GNSS-R) measurements have been collected over the past 15 years. Flight campaigns have included penetration of hurricanes with winds up to 60 m/s and flights over agricultural fields with calibrated soil moisture measurements. Fixed, tower-based GNSS-R experiments have been conducted to make measurements of sea state, sea level, soil moisture, ice and snow as well as inter-comparisons with microwave radiometry.
The GNSS-R methods enable the use of small, low power, passive instruments. The power and weight of GNSS-R instruments can be made low enough to enable deployment on small satellites, balloons and UAV’s. Early research sets of satellite-based GNSS-R data were first collected by the UK-DMC satellite (2003), UK Tech Demo Sat-1 (2014) and the 8-satellite NASA CYGNSS constellation (2016). ESA GEROS-ISS (GNSS ReEflectometry, Radio-Occultation and Scatterometry on the International Space Station) was meant to demonstrate GNSS-R altimetry. FFSCat, 2017 Copernicus Masters overall winner, was launched on September 3rd, 2020 and will try to combine GNSS-R, L-band microwave radiometry and hyperspectral data for sea ice and soil moisture applications. Availability of spaceborne GNSS-R data and the development of new applications from these measurements, is expected to increase significantly following the launches of these new satellite missions.
Actually, GNSS-R can be understood as a multi-static radar using navigation signals, but recently, some of the methods have been applied to other satellite transmissions in other frequencies, ranging from P-band (230 MHz) to K-band (18.5 GHz). So-called “Signals of Opportuinty” (SoOp) methods enable microwave remote sensing outside of the protected bands, using frequencies allocated to satellite communications. Measurements of sea surface height, wind speed, snow water equivalent, and soil moisture have been demonstrated with SoOp.
In this talk, the state of the art, principles, applications and current/planned GNSS-R and SoOp missions will be presented.
Prof. Adriano Camps (IEEE Fellow 2011) was born in Barcelona, Spain, in 1969. In 1993 he joined the Electromagnetics and Photonics Engineering Group, Department of Signal Theory and Communications, UPC, as an Assistant Professor, Associate Professor in 1997, and Full Professor since 2007. In 1999, he was on sabbatical leave at the Microwave Remote Sensing Laboratory, of the University of Massachusetts, Amherst. His research interests are focused in microwave remote sensing, with special emphasis in microwave radiometry by aperture synthesis techniques (MIRAS instrument onboard ESA’s SMOS mission), remote sensing using signals of opportunity (GNSS-R), and nanosatellites as a tool to test innovative remote sensors. Dr. Camps has published over 216 papers in peer-reviewed journals, 7 book chapters and the book Emery and Camps, “Introduction to Satellite Remote Sensing. Atmosphere, Ocean, Land and Cryosphere Applications,” Elsevier, 2017, 860 pages), and more than 453 conference presentations, holds 10 patents, and has advised 25 PhD students (+10 on-going), and more than 140 final project and M.Eng. Theses. According to Scopus/Google Scholar his h-index is 39/51, and his publications have received more than 7198/10750 citations.
Dr. Camps was IGARSS 2007 Technical Program Committee Chair and IGARSS 2020 general co-chair, Associate Editor of Radio Science, IEEE Gesocience and Remote Sensing Letters, and he is currently Associate Editor of the IEEE Transactions on Geoscience and Remote Sensing. He has been member of the IEEE Geoscience and Remote Sensing Society Administrative Committee since 2002, where he has been the Newsletter Editor, the web editor, Vice President of Information Resources, Vice President of Meetings and Symposia, Executive Vice President, and in 2017 and 2018 President of the IEEE Geoscience and Remote Sensing Society.