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CubeSat constellations provide enhanced crop phenology and digital agricultural insights using daily leaf area index retrievals

Journal Article · · Scientific Reports
 [1];  [2];  [3];  [4];  [1]
  1. King Abdullah University of Science and Technology (KAUST), Thuwal (Saudi Arabia)
  2. King Abdullah University of Science and Technology (KAUST), Thuwal (Saudi Arabia); Hydrosat (Luxembourg)
  3. Planet Labs Inc., San Francisco, CA (United States)
  4. Univ. of Nebraska, Lincoln, NE (United States)
Satellite remote sensing has great potential to deliver on the promise of a data-driven agricultural revolution, with emerging space-based platforms providing spatiotemporal insights into precision-level attributes such as crop water use, vegetation health and condition and crop response to management practices. Using a harmonized collection of high-resolution Planet CubeSat, Sentinel-2, Landsat-8 and additional coarser resolution imagery from MODIS and VIIRS, we exploit a multi-satellite data fusion and machine learning approach to deliver a radiometrically calibrated and gap-filled time-series of daily leaf area index (LAI) at an unprecedented spatial resolution of 3 m. The insights available from such high-resolution CubeSat-based LAI data are demonstrated through tracking the growth cycle of a maize crop and identifying observable within-field spatial and temporal variations across key phenological stages. Daily LAI retrievals peaked at the tasseling stage, demonstrating their value for fertilizer and irrigation scheduling. An evaluation of satellite-based retrievals against field-measured LAI data collected from both rain-fed and irrigated fields shows high correlation and captures the spatiotemporal development of intra- and inter-field variations. Novel agricultural insights related to individual vegetative and reproductive growth stages were obtained, showcasing the capacity for new high-resolution CubeSat platforms to deliver actionable intelligence for precision agricultural and related applications.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). AmeriFlux
Sponsoring Organization:
USDA; USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1982171
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 12; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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