Document


Title

Effects of line-of-sight motion on hyperspectral Fourier transform measurements
Document Type: Journal Article
Author(s): G. Miecznik; B. R. Johnson
Publication Year: 2015

Cataloging Information

Keyword(s):
  • Fourier Transform
  • hyperspectral imaging
  • Impact
  • interferometry
  • Jitter
  • remote sensing
  • remote sensing
  • satellites
  • smoke management
  • Spacecraft
  • spectrometer
Region(s):
  • International
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 54867
Tall Timbers Record Number: 32708
TTRS Location Status: Not in file
TTRS Call Number: Available
TTRS Abstract Status: Okay, Fair use, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

Atmospheric spectra reconstructed from interferometric measurements are susceptible to scene motion, which can be caused by changing environment or instrument jitter. This leads to a coupling between the time series of the modulated scene radiance and the interferogram collected as a function of time. Spectral artifacts are generated when this occurs and appear as both narrow, isolated spikes in the measurement wavelength band as well as broad, out-of-band features. Here, we derive an analytical relationship that depends on jitter frequency, amplitude and phase, and the scene gradient. The observed radiance is expressed as a spatially weighted mixture of radiance originating from various points within the scene. Spectral artifacts created by relative scene motion are shown to be proportional to the radiometric scene difference within the instrument field of view (FOV) and jitter amplitude, and vary significantly with the jitter frequency. The analytical solution can be useful in various applications, where image instability is expected to have an effect on measurements in question, ranging from spectroscopy of turbine plumes, through airborne measurements of smoke density and chemical composition in natural fire or volcanic events, to atmospheric sounding from space. © 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)

Online Link(s):
Citation:
Miecznik, G., and B. R. Johnson. 2015. Effects of line-of-sight motion on hyperspectral Fourier transform measurements. Journal of Applied Remote Sensing, v. 9, p. 95982. 10.1117/1.JRS.9.095982.