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MISR/atbd-misr09. pdf. 01/1999;
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ABSTRACT: Aerosols are believed to play a direct role in the radiation
budget of Earth, but their net radiative effect is not well established,
particularly on regional scales. Whether aerosols heat or cool a given
location depends on their composition and column amount and on the
surface albedo, information that is not routinely available, especially
over land. Obtaining global information on aerosol and surface radiative
characteristics, over both ocean and land, is a task of the Multi-angle
Imaging SpectroRadiometer (MISR), an instrument to be launched in 1998
on the Earth Observing System EOS-AM1 platform. Three algorithms are
described that will be implemented to retrieve aerosol properties
globally using MISR data. Because of the large volume of data to be
processed on a daily basis, these algorithms rely on lookup tables of
atmospheric radiative parameters and predetermined aerosol mixture
models to expedite the radiative transfer (RT) calculations. Over
oceans, the “dark water” algorithm is used, taking full
advantage of the nature of the MISR data. Over land, a choice of
algorithms is made, depending on the surface types within a scene-dark
water bodies, heavily vegetated areas, or high-contrast terrain. The
retrieval algorithms are tested on simulated MISR data, computed using
realistic aerosol and surface reflectance models. The results indicate
that aerosol optical depth can be retrieved with an accuracy of 0.05 or
10%, whichever is greater, and some information can be obtained about
the aerosol chemical and physical properties
IEEE Transactions on Geoscience and Remote Sensing 08/1998; · 2.89 Impact Factor
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D.J. Diner,
J.C. Beckert,
T.H. Reilly,
C.J. Bruegge,
J.E. Conel,
R.A. Kahn,
J.V. Martonchik, T.P. Ackerman,
R. Davies,
S.A.W. Gerstl,
H.R. Gordon,
J.-P. Muller,
R.B. Myneni,
P.J. Sellers,
B. Pinty,
M.M. Verstraete
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ABSTRACT: The Multi-angle Imaging SpectroRadiometer (MISR) instrument is
scheduled for launch aboard the first of the Earth Observing System
(EOS) spacecraft, EOS-AM1. MISR will provide global, radiometrically
calibrated, georectified, and spatially coregistered imagery at nine
discrete viewing angles and four visible/near-infrared spectral bands.
Algorithms specifically developed to capitalize on this measurement
strategy will be used to retrieve geophysical products for studies of
clouds, aerosols, and surface radiation. This paper provides an overview
of the as-built instrument characteristics and the application of MISR
to remote sensing of the Earth
IEEE Transactions on Geoscience and Remote Sensing 08/1998; · 2.89 Impact Factor
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Diner,
J.C. Beckert,
T.H. Reilly,
C.J. Bruegge,
J.E. Conel,
R. Kahn,
J.V. Martonchik, T.P. Ackerman,
R. Davies,
S.A.W. Gerstl,
H.R. Gordon,
J-P. Muller,
R. Myneni
IEEE Transactions on Geoscience and Remote Sensing 01/1998; 36. · 2.89 Impact Factor
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D.J. Diner,
C.J. Bruegge,
J.V. Martonchik, T.P. Ackerman,
R. Davies,
S.A.W. Gerstl,
H.R. Gordon,
P.J. Sellers,
J. Clark,
J.A. Daniels,
E.D. Danielson,
V.G. Duval,
K.P. Klaasen,
G.W. Lilienthal,
D.I. Nakamoto,
R.J. Pagano,
T.H. Reilly
[show abstract]
[hide abstract]
ABSTRACT: The scientific objectives, instrument concept, and data plan for
the multiangle imaging spectroradiometer (MISR), an experiment proposed
for the Eos (Earth Observing System) mission, are described. MISR is a
pushbroom imaging system designed to obtain continuous imagery of the
sunlit Earth at four different view angles (25.8°, 45.6°,
60.0°, and 72.5° relative to the vertical at the Earth's
surface), in both the forward and aftward directions relative to nadir,
using eight separate cameras. Observations will be acquired in four
spectral bands, centered at 440, 550, 670, and 860 nm. Data analysis
algorithms will be applied to MISR imagery to retrieve the optical,
geometric, and radiative properties of complex, three-dimensional
scenes, such as aerosol-laden atmospheres above a heterogeneously
reflecting surface, nonstratified cloud systems, and vegetation
canopies. The MISR investigation will address a number of scientific
questions concerning the climatic and ecological consequences of many
natural and anthropogenic processes, and will furnish the aerosol
information necessary
IEEE Transactions on Geoscience and Remote Sensing 04/1989; · 2.89 Impact Factor
