Laboratory calibration of field reflectance panelsA method used for calibrating field reflectance panels in the visible and shortwave infrared wavelength range is described. The directional reflectance factor of painted barium sulfate (BaSO4) panels is determined. The reference for this method is the hemispherical reflectance of pressed polytetrafluoroethylene (halon) powder prepared according to National Bureau of Standards (NBS) directions. The panels and a radiometer are mounted on rotation stages to measure the reflectance factor at different incidence and view angles. The sensor can be any laboratory or field filter radiometer small enough to mount on the apparatus. The method is used to measure the reflectance factors of halon and BaSO4 panels between 0.45 and 0.85 micrometers. These reflectance factors are compared to those measured by a field apparatus. The results agree to within 0.013 in reflectance at incidence angles between 15 and 75 degrees.
Document ID
19890040406
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Biggar, S. F. (Arizona Univ. Tucson, AZ, United States)
Labed, J. (Arizona Univ. Tucson, AZ, United States)
Santer, R. P. (Arizona Univ. Tucson, AZ, United States)
Slater, P. N. (Arizona, University Tucson, United States)
Jackson, R. D. (USDA, Water Conservation Laboratory, Phoenix AZ, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Recent Advances in Sensors, Radiometry, and Data Processing for Remote Sensing