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Carbon Cycle & Ecosystems

This proposal addresses the need to develop algorithms for estimating vegetation three-dimensional (3D) structure and biomass relevant to the ecological applications of the DESDynI mission specified in the National Research Council’s Decadal Survey. These algorithms will serve to provide i.) a systematic methodology for combining the SAR, InSAR and LiDAR measurement capabilities of the DESDynI mission, and ii.) a mechanism to explore the observational tradespace in terms of the overall DESDynI instrument complexity versus the accuracy of the delivered products of vegetation 3D structure and estimates of above-ground biomass. The algorithm described in this proposal is based on a SAR segmentation approach that will be used to extend LiDAR observations over the DESDynI swath. By relying on segmentation, the algorithm allows for regions of a like response to the RaDAR, whether the backscatter sensitivity to biomass is saturated or not, to be aggregated and associated with LiDAR observations over similar regions. This algorithm will be initially exercised over local scales for the purpose of detailed refinement and providing short-term feedback to the overall instrument configuration. The results and experience obtained will then be broadened to address in the first instance, swath-wide scales and then include a sample of swaths over sites representing the major biomes and those with different vegetation 3D structure and biomass. The intent of the work will be to provide timely evaluative feedback to the overall mission configuration for the purpose of finalizing the ultimate DESDynI configuration as it applies to the stated needs of NASA’s Terrestrial Ecology program. By taking the multi-scale approach described here, first results will be available from the work within one year, with an increase in the breadth of analysis achieved over the duration of the project.

Project PI: Paul Siqueira/University of Massachusetts

113D Knowles Engineering Building University of Massachusetts 151 Holdsworth Way Amherst MA 01003-9284

Phone: (413)577-0623

Email: siqueira@ecs.umass.edu

http://www.ecs.umass.edu/index.pl?id=4625

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Started: Aug 10, 2010

Last Activity: Dec 16, 2010

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