DocumentCode :
1163368
Title :
An information theory approach for evaluating Earth radiation budget (ERB) measurements: nonuniform sampling of diurnal longwave flux variations
Author :
Halyo, Nesim ; Direskeneli, Haldun ; Barkstrom, Bruce R.
Author_Institution :
Inf. & Control Syst. Inc., Hampton, VA, USA
Volume :
29
Issue :
4
fYear :
1991
fDate :
7/1/1991 12:00:00 AM
Firstpage :
665
Lastpage :
673
Abstract :
Satellite measurements are subject to a wide range of uncertainties due to their temporal, spatial, and directional sampling characteristics. An information theory approach is suggested to examine the nonuniform temporal sampling of Earth radiation budget (ERB) measurements. The information (i.e. the entropy or uncertainty) before and after the measurements is determined, and the information gain is defined as a reduction in the uncertainties involved. A stochastic model for the diurnal outgoing flux variations that affect the ERB is developed. Using Gaussian distributions for the a priori and measured radiant exitance fields, the information gain is obtained by computing the a posteriori covariance. The information gain for the monthly outgoing flux measurements is examined for different orbital parameters and orbital tracks
Keywords :
atmospheric radiation; atmospheric techniques; ERB; Earth radiation budget; IR; OLR; atmosphere; diurnal longwave flux variations; diurnal outgoing flux variations; information theory; infrared; measurement; nonuniform sampling; stochastic model; technique; temporal sampling; uncertainty; Distributed computing; Earth; Entropy; Extraterrestrial measurements; Gain measurement; Gaussian distribution; Information theory; Sampling methods; Satellites; Stochastic processes;
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
Publisher :
ieee
ISSN :
0196-2892
Type :
jour
DOI :
10.1109/36.135829
Filename :
135829
Link To Document :
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