期刊
REMOTE SENSING OF ENVIRONMENT
卷 179, 期 -, 页码 131-148出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.rse.2016.03.029
关键词
BRDF; Albedo; Directional reflectance; Remote sensing; Airborne; Ocean; Vegetation; Savannah; Croplands; Snow; Sea ice; Desert; Wetlands; Clouds; Smoke layers
资金
- Science Mission Directorate of the National Aeronautics and Space Administration
In this paper we describe measurements of the bidirectional reflectance-distribution function (BRDF) acquired over a 30-year period (1984-2014) by the National Aeronautics and Space Administration's (NASA's) Cloud Absorption Radiometer (CAR). Our BRDF database encompasses various natural surfaces that are representative of many land cover or ecosystem types found throughout the world. CAR's unique measurement geometry allows a comparison of measurements acquired from different satellite instruments with various geometrical configurations, none of which are capable of obtaining such a complete and nearly instantaneous BRDF. This database is therefore of great value in validating many satellite sensors and assessing corrections of reflectances for angular effects. These data can also be used to evaluate the ability of analytical models to reproduce the observed directional signatures, to develop BRDF models that are suitable for sub-kilometer-scale satellite observations over both homogeneous and heterogeneous landscape types, and to test future spaceborne sensors. All of these BRDF data are publicly available and accessible in hierarchical data format (http:car.gsfc.nasa.gov/). (C) 2016 Elsevier Inc. All rights reserved.
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