# Browse Dissertations and Theses - Electrical and Computer Engineering by Contributor "Gardner, Chester S."

• (1989)
Atmospheric turbulence severely limits the resolution of ground-based astronomical telescopes. In good seeing conditions at the best observatory sites, resolution at visible wavelengths is typically limited to $\sim$1 sec ...

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• (1998)
University of Illinois Na wind/temperature lidar was installed at the Starfire Optical Range (SOR) (35$\sp\circ$N, 106.5$\sp\circ$W) near Albuquerque, New Mexico, in September 1994. The Na wind/temperature lidar system was ...

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• (1991)
Lidar measurements of mesospheric Fe were conducted at Urbana, Illinois, during four nights in late October 1989. The average Fe abundances, layer centroid heights and rms widths varied between 1.0-2.0 $\times$ 10$\sp{10}$ ...

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• (1991)
Nightly and seasonal variations in gravity wave activity in the mesopause region are examined by analyzing 60 nights of Na lidar observations obtained during a five-year period at Urbana, Illinois. The lidar data were used ...

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• (1990)
The high spatial and temporal resolution of the UIUC CEDAR lidar and new processing techniques have significantly improved the study of vertical and temporal structures of the middle atmosphere. This thesis paper first ...

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• (2002)
Similar to the Na observations at South Pole in 1995--1997, the seasonal variations in Fe column abundance, height, and width exhibit a strong annual cycle. The Fe and Na densities exhibit strong 12-month oscillations with ...

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• (1998)
Finally, a new gravity wave spectral model is developed. We employ more realistic models of the source spectra and diffusive filtering theory (DFT) to model the one-dimensional and two-dimensional spectra of horizontal and ...

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• (1994)
We present lidar observations of the middle atmosphere at the South Pole (90$\sp\circ$S), Syowa (69$\sp\circ$S, 39$\sp\circ$E), and Urbana (88$\sp\circ$W, 40$\sp\circ$N). The South Pole stratospheric observations yield a ...

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• (1993)
We present over 350 hr of Na lidar measurements of mesospheric ($\sim$80-105 km) density perturbations obtained on 50 nights throughout all four seasons at Urbana, Illinois, during the years 1988-1993. For perturbations ...

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• (1998)
More than 1000 hours of high-resolution sodium lidar observations were taken at the Urbana Atmospheric Observatory from February 1996 to April 1998. Temperature and Na density were measured in the mesosphere and lower ...

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• (1989)
A data analysis technique for determining gravity wave intrinsic parameters is presented. The intrinsic parameters include the horizontal and vertical wavelengths, period, and wave propagation direction. The technique ...

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• (1993)
Gravity wave models for the horizontal wave number spectra of atmospheric velocity and density fluctuations are derived by assuming that both saturated and unsaturated waves obey the polarization and dispersion relations ...

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