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Proceedings Paper

The characterization of a DIRSIG simulation environment to support the inter-calibration of spaceborne sensors
Author(s): Brittany L. Ambeau; Aaron D. Gerace; Matthew Montanaro; Joel McCorkel
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Paper Abstract

Climate change studies require long-term, continuous records that extend beyond the lifetime, and the temporal resolution, of a single remote sensing satellite sensor. The inter-calibration of spaceborne sensors is therefore desired to provide spatially, spectrally, and temporally homogeneous datasets. The Digital Imaging and Remote Sensing Image Generation (DIRSIG) tool is a first principle-based synthetic image generation model that has the potential to characterize the parameters that impact the accuracy of the inter-calibration of spaceborne sensors. To demonstrate the potential utility of the model, we compare the radiance observed in real image data to the radiance observed in simulated image from DIRSIG. In the present work, a synthetic landscape of the Algodones Sand Dunes System is created. The terrain is facetized using a 2-meter digital elevation model generated from NASA Goddard's LiDAR, Hyperspectral, and Thermal (G-LiHT) imager. The material spectra are assigned using hyperspectral measurements of sand collected from the Algodones Sand Dunes System. Lastly, the bidirectional reflectance distribution function (BRDF) properties are assigned to the modeled terrain using the Moderate Resolution Imaging Spectroradiometer (MODIS) BRDF product in conjunction with DIRSIG's Ross-Li capability. The results of this work indicate that DIRSIG is in good agreement with real image data. The potential sources of residual error are identified and the possibilities for future work are discussed.

Paper Details

Date Published: 19 September 2016
PDF: 9 pages
Proc. SPIE 9972, Earth Observing Systems XXI, 99720M (19 September 2016); doi: 10.1117/12.2238317
Show Author Affiliations
Brittany L. Ambeau, Rochester Institute of Technology (United States)
Aaron D. Gerace, Rochester Institute of Technology (United States)
Matthew Montanaro, Rochester Institute of Technology (United States)
Joel McCorkel, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 9972:
Earth Observing Systems XXI
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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