IMAGING SPATIAL HETEROGENEITY OF SOLAR-INDUCED CHLOROPHYLL FLUORESCENCE (SIF) WITH VERY HIGH SPATIAL RESOLUTION DRONE IMAGERY

被引：0

作者：

Bendig, J. ^{[1
]}

Siegmann, B. ^{[1
]}

Kneer, C. ^{[1
,2
]}

Chakhvashvili, E. ^{[1
]}

Kraemer, J. ^{[1
]}

Choza-Farias, S. ^{[1
]}

Rascher, U. ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Biogeosci, Julich, Germany

[2] Univ Appl Sci Koblenz, Dept Math & Technol, Remagen, Germany

来源：

IGARSS 2023 - 2023 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM | 2023年

关键词：

multi camera array; uncrewed aerial system; HyPlant; FloX;

D O I：

10.1109/IGARSS52108.2023.10283066

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Here, we present one of the first datasets recorded by a drone based prototype dual camera system based on narrow band high-quality optical filters, hereafter named SIFcam. The camera allows for sensing solar-induced chlorophyll fluorescence (SIF) at 760 nm (F-760) with centimeter ground sampling distance. The system performance was evaluated against simultaneous observations of a wheat-bean mixed canopy carried out using a mobile ground-based nonimaging system FloX (R-2 = 0.84, RMSE = 0.17 mWm(-2)nmsr(-1)) and SIF imagery acquired by the airborne imager HyPlant (R-2 = 0.52, RMSE = 0.24 mWm(-2)nm-lsr(-1)). The analysis of near-infrared reflectance allowed us to quantify on average 95.4% contribution of F-760 signal originating from sun-lit pixels of investigated canopies. Additional multispectral imagery facilitated calculation of fractional vegetation cover (FVC) of >88%. Spatial patterns of sunlit pixels are systematically consistent, indicating the plausibility of the SIFcam measurements.

引用

页码：4654 / 4657

页数：4