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Initial Results of the Bidirectional Reflectance Characterization Round-Robin in Support of EOS



Bettye C. Johnson, P Y. Barnes, Thomas R. O'Brian, James J. Butler, C J. Bruegge, S F. Biggar, P R. Spyak, M M. Pavlov


Laboratory measurements of the bidirecitonal reflectance distribution function (BRDF) of diffusely reflecting samples are required to support calibration in the National Aeronautics and Space Administration's (NASA's) Earth Observing System (EOS) program. To assess the ability of the instrument calibration laboratories to perform accurate BRDF measurements, a round-robin intercomparison with the National Institute of Standards and Technology (NIST) as the central laboratory was initiated by the EOS Project Science Office. The comparison parameters, which include measurement wavelength, spectral bandwidth, illumination and viewing geometry, sample type and alignment, and data format, were selected in consultation with the participants. The participants were selected based on their roles as metrology laboratories with direct connections to EOS or to other international Earth remote sensing satellite programs. This paper briefly describes the format of the intercomparison, the status of the first round, and some preliminary results.


aluminum, BRDF, EOS, intercomparison, PTFE, reflectance, Spectralon


Johnson, B. , Barnes, P. , O'Brian, T. , Butler, J. , Bruegge, C. , Biggar, S. , Spyak, P. and Pavlov, M. (1998), Initial Results of the Bidirectional Reflectance Characterization Round-Robin in Support of EOS, Metrologia (Accessed May 30, 2024)


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Created October 1, 1998, Updated February 17, 2017