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- Publications
- Influence
Optical properties of inhomogeneous materials: applications to geology
- W. Egan, Theodore W. Hilgeman
- Materials Science, Geology
- 1979
- 66
- 9
Terrestrial polarization imagery obtained from the Space Shuttle: characterization and interpretation.
- W. Egan, W. R. Johnson, V. S. Whitehead
- Physics, Medicine
- Applied optics
- 1 February 1991
An experiment to measure the polarization of land, sea, haze, and cloud areas from space was carried aboard the Space Shuttle in Sept. 1985. Digitized polarimetric and photometric imagery in mutually… Expand
The rings of saturn: A frost-coated semiconductor?
- W. Egan, T. Hilgeman
- Physics
- 1 February 1977
Abstract Optical complex indices of refraction for the iron-sulfur semiconductors troilite and pyrrhotite have been measured between 0.3 and 1.1 μm, and at 1.5 and 3.0 cm in the microwave region. The… Expand
Complex index of refraction of bulk solid carbon dioxide.
- W. Egan, F. Spagnolo
- Physics, Medicine
- Applied optics
- 1 November 1969
Optical depolarization properties of surfaces illuminated by coherent light.
- W. Egan, J. Grusauskas, H. Hallock
- Physics, Medicine
- Applied optics
- 1 August 1968
An experimental investigation of the depolarization characteristics of complex surfaces illuminated by 6328-A laser radiation was made on a large scale polarimeter. Measurements were made on… Expand
Coherence-polarization phenomena in remote sensing
- W. Egan, H. Hallock
- Physics
- 1 April 1969
The importance of polarization phenomena in remote sensing by electromagnetic means is discussed briefly. With active sensor systems using microwave or laser sources the radiation is very likely to… Expand
Retroreflectance measurements of photometric standards and coatings.
- W. Egan, T. Hilgeman
- Physics, Medicine
- Applied optics
- 1 July 1976
Using a technique that we have developed, the opposition effect (brightening in the retroreflection direction) has been measured for MgCO(3), BaSO(4) paint, and sulfur in the visual region with… Expand
Optical enhancement of aircraft detection using polarization
Focal plane wideband infrared digital polarization imagery will be compared with visual wideband focal plane digital imagery of a camouflaged C-130 aircraft to show the extreme enhancement possible… Expand
Optical stokes parameters for farm cropidentification
- W. Egan
- Geology
- 1 June 1970
Summary The use of bidirectional polarization and photometry implies the efficient use of all the optical information available in the scattered radiation. This information is represented as Stokes… Expand