Atmospheric Compensation of Extreme Off-Nadir Hyperspectral Imagery from Hyperion

Abstract

Compared to nadir viewing, off-nadir viewing of the ground from a high-altitude platform provides opportunities to increase area coverage and to reduce revisit times, although at the expense of spatial resolution. In this study, the ability to atmospherically compensate off-nadir hyperspectral imagery taken from a space platform was evaluated for a worst-case viewing geometry, using EO-1 Hyperion data collected with an off-nadir angle of 63? at the sensor, corresponding to six air masses along the line of sight. Reasonable reflectance spectra were obtained using both first-principles (FLAASH) and empirical (QUAC) atmospheric-compensation methods. Some refinements to FLAASH that enable visibility retrievals with highly off-nadir imagery, and also improve accuracy in nadir viewing, were developed and are described.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2007
Accession Number
ADA532189

Entities

People

  • Anthony J. Ratkowski
  • Lawrence S. Bernstein
  • Michael W. Matthew
  • Robert L. Sundberg
  • Steven M. Adler-golden

Tags

Communities of Interest

  • Sensors
  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Air Force Research Laboratories
  • Air Masses
  • Atmospheric Scattering
  • Attitude Control Systems
  • Compensation
  • Control Systems
  • Data Acquisition
  • Diffraction
  • Geometry
  • Line Of Sight
  • Materials
  • Measurement
  • Reflectance
  • Scattering
  • Spectra
  • Visibility

Readers

  • Computational Modeling and Simulation
  • Image Processing and Computer Vision.

Technology Areas

  • Space