Potential of automated digital hemispherical photography and wireless quantum sensors for routine canopy monitoring and satellite product validation

Brown, LA; Morris, H; Albero, E; Lopez-Baeza, E; Tiedemann, F; Siebecke, L; Knohl, A; da Silva Gomes, C; Bai, G; Lerebourg, C; Gobron, N; Lanconelli, C; Clerici, M; Culvenor, D; Dash, J

Abstract

To better characterize the temporal dynamics of vegetation biophysical variables, a variety of automated in situ measurement techniques have been developed in recent years. In this study, we investigated automated digital hemispherical photography (DHP) and wireless quantum sensors, which were installed at two sites under the Copernicus Ground Based Observations for Validation (GBOV) project. Daily estimates of plant area index (PAI) and the fraction of absorbed photosynthetically active radiation (FAPAR) were obtained, which realistically described expected vegetation dynamics. Good correspondence with manual DHP and LAI-2000 data (RMSE = 0.39 to 0.90 for PAI, RMSE = 0.07 for FAPAR) provided confidence that the investigated approaches can deliver data of comparable quality to traditional in situ measurement techniques.

• Presentation Conference Type: Other
• Conference Name: 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS
• Start Date: Jul 11, 2021
• End Date: Jul 16, 2021
• Publication Date: Oct 12, 2021
• Deposit Date: Oct 28, 2022
• Publisher: Institute of Electrical and Electronics Engineers
• DOI: https://doi.org/10.1109/IGARSS47720.2021.9553564
• Publisher URL: https://doi.org/10.1109/IGARSS47720.2021.9553564
• Additional Information: Event Type : Conference