Article

Multi-angle Imaging SpectroRadiometer Instrument Description and Experiment Overview

02/1999;
Source: CiteSeer

ABSTRACT The Multi-angle Imaging SpectroRadiometer instrument is scheduled for launch aboard the first of the Earth Observing System spacecraft, EOS-AM1. MISR will provide global, calibrated, and co-registered imagery at nine discrete viewing angles and four spectral bands. Algorithms developed specifically 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. I. INTRODUCTION The MISR instrument was delivered by the Jet Propulsion Laboratory to the space- craft contractor, Lockheed Martin Missiles and Space Valley Forge, Pennsylvania, on May 26, 1997. This delivery marked one of many major milestones in preparation for launch, currently scheduled for late-June 1998 from Vandenberg Air Force Base in California. MISR measurements are designed to improve our understanding o...

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    Conference Proceeding: Advances in mapping woody plant canopies using the NASA MISR Instrument on terra
    M. Chopping, Lihong Su, N. Kollikkathara, L. Urena
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    ABSTRACT: Red (672 nm) band reflectance estimates from the NASA multi-angle imaging spectro-radiometer (MISR) on the earth observing system Terra satellite were used to obtain maps of woody plant fractional crown cover, mean canopy height, and biomass for large parts of south-eastern Arizona and southern New Mexico (>200,000 km<sup>2</sup>). MISR red band bidirectional reflectance estimates in nine views mapped to a 250 m grid were used to adjust the simple geometric-optical model (SGM) that is based on the principles of Boolean geometry first exploited in Li-Strahler geometric-optical (GO) models. The soil-understory background signal was decoupled a priori by exploiting relationships with the nadir camera reflectance data and the kernel weights of the LiSparse-RossThin kernel-driven bidirectional reflectance distribution function (BRDF) model. Maps of fractional crown cover, mean canopy height, and biomass were produced via retrievals of the mean crown radius and shape parameters from inversion of the SGM using the Praxis algorithm. The mean absolute error in randomly sampled and filtered estimates of fractional crown cover, mean canopy height, and woody biomass was 0.10, 2.2 meters, and 4.5 tons acre<sup>-1</sup> (10.1 Mg ha<sup>-1</sup>), with RMS errors of 0.12, 3.3 and 6.2 (14.0), and coefficients of determination (R<sup>2</sup>) of 0.78, 0.69, and 0.81, respectively, significant at the 0.01 level (N=576).
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Keywords

Algorithms
 
as-built instrument characteristics
 
California
 
clouds
 
co-registered imagery
 
Earth Observing System spacecraft
 
geophysical products
 
global
 
Jet Propulsion Laboratory
 
Lockheed Martin Missiles
 
major milestones
 
MISR instrument
 
MISR measurements
 
Multi-angle Imaging SpectroRadiometer instrument
 
Space Valley Forge
 
space- craft contractor
 
spectral bands
 
surface radiation
 
understanding o
 
Vandenberg Air Force Base