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Utah State University, Auroral Research, And The Cold War, Paul Concidine
Utah State University, Auroral Research, And The Cold War, Paul Concidine
Utah Space Grant Consortium
On November 19, 1976, a Talos-Castor rocket left the Poker Flat Research Range near Fairbanks, Alaska. Prepared by a team of engineers from Utah State University, the primary scientific instruments on board were two high power electron accelerators designed to shoot powerful beams of electrons into the atmosphere, thus creating artificial aurora. Though one of the accelerators experienced a short circuit, the other produced the desired electron beam up to and as the rocket reached its apogee at 265 kilometers, and then throughout its descent to approximately 84 kilometers.1 This particular launch, however, was merely a test of the electron …
Mesospheric Temperature Climatology And Comparisons Above The Rocky Mountains, Joshua P. Herron
Mesospheric Temperature Climatology And Comparisons Above The Rocky Mountains, Joshua P. Herron
Utah Space Grant Consortium
A Rayleigh-scatter lidar has been operated by the Center for Atmospheric and Space Sciences (CASS) at Utah State University (USU) since 1993. The lidar measures atmospheric temperatures between 45 and 90 km which are important for understanding the physics and chemistry of the middle atmosphere. The temperature profiles were used to create a multi-year temperature climatology. This climatology was used for comparisons with the temperature climatology from the Purple Crow Lidar at the University of Western Ontario, and nightly temperature profiles from the SABER instrument on board the TIMED satellite.
Saber Data Processing, Ricky L. Fielding
Saber Data Processing, Ricky L. Fielding
Utah Space Grant Consortium
SABER is an infrared multi-spectral radiometer aboard the TIMED satellite. It measures radiatively active species in the atmospheric region from 60 km to 130 km altitude. We are particularly interested in the 2.06 μm and 1.67 μm bands as an indication of the Hydroxyl (OH) concentration in the atmosphere. Here, we detail visualization work along with early results from the SABER OH radiometer channels.
Recent Results From The Usu Plasma Impedance Probe For The Nasa E-Winds Sounding Rocket Campaign, Chad G. Carlson
Recent Results From The Usu Plasma Impedance Probe For The Nasa E-Winds Sounding Rocket Campaign, Chad G. Carlson
Utah Space Grant Consortium
The new plasma impedance probe built by Utah State University was °own on July 1, 2003 as part of a NASA sounding rocket cam- paign to investigate midlatitude plasma layers and neutral winds. The instrument provided measure- ments of absolute and relative electron densities for the mission. The instrumentation technique is brie°y introduced, along with the plasma param- eters that the technique is capable of measuring. Relative electron densities from the DC Langmuir probe for the mission are presented along with a comparison of the relative density data to the ab- solute density provided by the plasma frequency probe.
Scattering Computations From Canonical Geometries And Their Accuracy, Clayton Davis
Scattering Computations From Canonical Geometries And Their Accuracy, Clayton Davis
Utah Space Grant Consortium
An overview of the computation of electromagnetic scattering is presented. Issues of solution convergence and future work in error analysis is also discussed.
Motion Compensation Of Interferometric Synthetic Aperture Radar, David P. Duncan
Motion Compensation Of Interferometric Synthetic Aperture Radar, David P. Duncan
Utah Space Grant Consortium
Synthetic aperture radar (SAR) is a digital signal processing technique which enhances the azimuth resolution of a radar image using the target Doppler history created by the motion of the radar platform. If the platform deviates from a constant velocity, straight-line path then image quality is lost and image details become unfocused. Motion compensation (MOCO) is a technique in which the position and attitude of the platform is recorded or estimated and then used to correct the scene’s Doppler history as if a straight-line, constant velocity path had been taken. Brigham Young University’s interferometric synthetic aperture radar (YINSAR) was flown …
An Infrared Approach To Thin-Layer Based Biosensors, Ignacio J. Garcia, Nicole Branan, Rola Altoos, Todd A. Wells
An Infrared Approach To Thin-Layer Based Biosensors, Ignacio J. Garcia, Nicole Branan, Rola Altoos, Todd A. Wells
Utah Space Grant Consortium
Biosensors exploit the theoretical and instrumental approaches of analytical chemistry and the unique properties of biological molecules. They utilize the intermolecular interactions and specificity found in systems such as hormone-receptor, antigenantibody, pathogen-host and substrate-enzyme. Manipulation of the structural and energetic factors that guide formation of these macromolecular complexes may provide a rational basis for the development of new sensor technology. To this end we have investigated myoglobin thin films for their ability to bind ligands. FTIR spectroscopy has been chosen as the transduction methods and has been shown to discriminate between several analytes.
Siftir: Spectro-Polarimetric Imaging Fourier Transform Spectrometer For The Infrared, Colby Jurgenson, Robert Stencel
Siftir: Spectro-Polarimetric Imaging Fourier Transform Spectrometer For The Infrared, Colby Jurgenson, Robert Stencel
Utah Space Grant Consortium
Observations of evolved stars in the infrared are well suited for studies of dusty environments, providing a wealth of absorption and emission bands with which to diagnose grain characteristics. We are currently developing an instrument that will employ a Fourier transform spectrometer in conjunction with TNTCAM2 (Klebe et al. 1998), an imaging polarimeter. The FTS component will enhance TNTCAM2, giving the instrument a maximum resolution of 2000 at 10 11m. The FTS is capable of operating between 2-15 11m, but polarimetry for the instrument is limited to the 8-15 11m region due to waveplate/wiregrid characteristics. SIFTIR, the Spectro-polarimetric Imaging Fourier …
Choosing A Starting Configuration For Particle Swarm Optimization, Mark Richards, Dan Ventura
Choosing A Starting Configuration For Particle Swarm Optimization, Mark Richards, Dan Ventura
Utah Space Grant Consortium
The performance of Particle Swarm Optimization can be improved by strategically selecting the starting positions of the particles. This work suggests the use of generators from centroidal Voronoi tessellations as the starting points for the swarm. The performance of swarms initialized with this method is compared with the standard PSO algorithm on several standard test functions. Results suggest that CVT initialization improves PSO performance in high-dimensional spaces.
Improving Electromagnetic Bias Estimates, Floyd W. Millett, Karl F. Warnick
Improving Electromagnetic Bias Estimates, Floyd W. Millett, Karl F. Warnick
Utah Space Grant Consortium
The derivation of an electromagnetic (EM) bias model that includes the physical optics scattering models and the non-Gaussian long wave surface statistics is presented. The final formulation of the model is expressed as a function of hydrodynamic modulation, surface skewness, and tilt modulation. Through the modulation transfer function, the hydrodynamic modulation coefficient is shown to be equivalent to the long wave RMS slope multiplied by a function of the short wave spectrum. With this result the normalized EM bias reduces to a function of long wave surface parameters with coefficients determined by properties of the short ocean waves. EM bias …