An Improved Method to Derive Surface Albedo from Narrowband AVHRR Satellite Data: Narrowband to Broadband Conversion
نویسندگان
چکیده
منابع مشابه
Narrowband to broadband conversions of land surface albedo: II. Validation
In the first paper of this series, we developed narrowband to broadband albedo conversion formulae for a series of sensors. These formulae were determined based on extensive radiative transfer simulations under different surface and atmospheric conditions. However, it is important to validate the simulation results using independent measurement data. In this paper, the validation results for th...
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Land surface broadband albedo is a critical variable for many scientific applications. High-resolution narrowband satellite observations contain important information that enables us to map land surface albedo globally, and validate the coarse-resolution albedo products from the broadband sensors using ground `̀ point/plot'' measurements. However, the conversions from narrowband to broadband alb...
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This Letter presents a formula for calculating broadband albedo (0.4–4.0 mm) of land surfaces from Visible/Infrared Imager/Radiometer Suite (VIIRS) spectral albedos. It is based on extensive radiative transfer simulations and multivariate regression analysis. Ground measurements from several test sites confirm that the conversion formula is very accurate. The VIIRS will be launched in 2006, and...
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Narrowband-to-broadband conversion is a critical procedure for mapping land-surface broadband albedo using multi-spectral narrowband remote-sensing observations. Due to the significant difference in optical characteristics between soil and vegetation, NTB conversion is influenced by the variation in vegetation coverage on different surface types. To reduce this influence, this paper applies an ...
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The history of beamforming in sonar applications goes back many years. Perhaps Collodon and Sturm’s use of a horn receiver in their 1826 measurement of the speed of sound in water is a first example. Their 13-km range certainly required a receiver with a good beam pattern to increase the signal to a measureable level. Although receivers have changed over the years, beamforming is still an activ...
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ژورنال
عنوان ژورنال: Journal of Applied Meteorology
سال: 1999
ISSN: 0894-8763,1520-0450
DOI: 10.1175/1520-0450(1999)038<0239:aimtds>2.0.co;2