30 December 1997 Three-dimensional modeling of agricultural canopies for thermal IR exitance studies
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Abstract
We present a simple, three-dimensional vegetation canopy thermal infrared exitance model for agricultural scenes. Computer graphics and ray-tracing techniques are used to estimate three-dimensional canopy view factors and scene shadows. The view factors are used to weight the individual contributions of soil and vegetation emission computed by steady-state energy budget formulations. We compare the three- dimensional model results to a one-dimensional formulation for an agricultural test site from the Hydrologic Atmospheric Pilot Experiment and Modelisation du Bilan Hydrique. The root mean square error is daylight brightness temperature for the one dimensional model was 2.5 degrees Celsius and 2.0 degrees Celsius for the three dimensional model.
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James Alan Smith, James Alan Smith, Jeffrey A. Pedelty, Jeffrey A. Pedelty, Jerrell R. Ballard, Jerrell R. Ballard, Thomas J. Schmugge, Thomas J. Schmugge, } "Three-dimensional modeling of agricultural canopies for thermal IR exitance studies", Proc. SPIE 3222, Earth Surface Remote Sensing, (30 December 1997); doi: 10.1117/12.298184; https://doi.org/10.1117/12.298184
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