In the framework of the ESA 8th Earth Explorer FLEX mission, ground-based and airborne measurements of sun-induced fluorescence (SIF) at canopy level are a relevant part in developing the mission concept and instrumental requirements. The detection of SIF requires very high spectral resolution instruments to observe radiance in the red and far-red spectral regions (650-800 nm). Different ground-based instruments were developed and tested during field campaigns in the last years, studying both the diurnal response and the seasonal trend of canopy fluorescence. In addition to these ground-based continuous and long-term measurements, the novel airborne high resolution imaging spectrometer HyPlant was employed in several airborne field campaigns to provide the first high spatial resolution (1 meter) maps of red and far-red fluorescence. The instrument technical characteristics, spectral/radiometric calibration, and spectral fitting methods to retrieve SIF from total at-sensor radiance will be discussed.
About the Speakers:
Sergio Cogliati received his PhD in 2011 and currently he is Post Doc at the University of Milano-Bicocca (Italy). His main research activities involved the development of automatic high-resolution spectrometers to detect canopy reflectance and sun-induced fluorescence and, the successive retrieval by using the spectral fitting retrieval algorithms. In the last few years, he was involved in the ESA/FLEX mission developing spectral fitting-based retrieval algorithm for satellite, airborne and ground-based observations. He participated to several airborne field campaigns collecting SIF measurements with the novel HyPlant imaging spectrometer, and in FLEX-US in 2013.
Caroline Nichol received her PhD in 2000 from the University of Edinburgh and is currently Senior Faculty in the School of GeoSciences at the University of Edinburgh. Caroline's research utilises both optical and LiDAR remote sensing to understand canopy-level (particularly forests) physiology and biosphere-atmosphere processes. Recent research has centered on investigations into retrievals of solar induced fluorescence in boreal ecosystems, utilizing optical data to monitor and track disease development in UK forest canopies and investigating new airborne multi spectral LiDAR data in north American and Canadian forest canopies.