A5082750488- Astro and Planetary Science
- Space Satellite Systems and Control
- Spacecraft Dynamics and Control
- Remote-Sensing Image Classification
- Impact of Light on Environment and Health
- Traumatic Ocular and Foreign Body Injuries
- Planetary Science and Exploration
- Galaxies: Formation, Evolution, Phenomena
- Structural Analysis and Optimization
- Stellar, planetary, and galactic studies
- Space Exploration and Technology
- Laser-induced spectroscopy and plasma
- Aerospace Engineering and Energy Systems
- CCD and CMOS Imaging Sensors
- Spacecraft Design and Technology
- Optical Polarization and Ellipsometry
- Urban Heat Island Mitigation
- Geology and Paleoclimatology Research
- Scientific Research and Discoveries
- Remote Sensing in Agriculture
- Geochemistry and Geologic Mapping
- Solar Radiation and Photovoltaics
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
Rochester Institute of Technology
2020-2025
University of Michigan
2020
Abstract We characterized the bi‐directional spectro‐polarimetry of olivine sands varying grain size distributions for a comprehensive set measurement and illumination angles over wavelength range 350–2,500 nm. Our laboratory instrumentation included hyperspectral goniometer, broadband linear polarizer, tungsten‐halogen source. Three distinct sand samples were used in our experiments. As function azimuth, we measured significant degree anisotropic scattering, that depends directly on...
We present a comprehensive hyperspectral bi-directional reflectance model for pristine optical-grade white Spectralon® panel with full azimuthal coverage, wide range of view zenith angles and incident illumination angles, throughout ultraviolet, visible, near infrared shortwave wavelengths (350–2500 nm). Measurements were acquired using the Goniometer Rochester Institute Technology-Two, which incorporates Analytical Spectral Device FieldSpec FR4 spectroradiometers. Residual plots show that...
Many ultra-diffuse galaxies (UDGs) have been discovered in the Coma cluster, and there is evidence that some, notably Dragonfly 44, Milky Way-like dynamical masses despite dwarf-like stellar masses. We used X-ray, UV, optical data to investigate star formation nuclear activity UDGs, we obtained deep UV X-ray (Swift XMM-Newton) for 44 search low-level formation, hot circumgalactic gas, integrated emission from binaries. Among find luminosities consistent with quiescence but NUV$-r$ colors...
Polarization provides useful quantitative information about scattering surfaces. In hyperspectral remote sensing of natural surfaces composed granular materials, there are relatively few studies polarization. Most earlier polarization have been based on multi-spectral data, and the majority focused negative branch polarization, which typically appears at phase angles less than 20 degrees, using models with limited accuracy. Models positive also shown limitations, particularly longer angles....
Diffuse sky radiance is a key variable for resolving the global energy budget, weather forecasting, radiative transfer modelling and estimating solar potential at Earth's surface. This study first attempt to directly measure full-sky view of using pushbroom imaging spectrometer. We mounted open-source hyperspectral imager (OpenHSI) on tripod rotation stage during clear day in Rochester, NY, USA, resampled swaths sphere HEALPix projection. achieved 0.45∘ angular resolution, which an order...
Reflectivity control devices (RCDs) based on polymer dispersed liquid crystals were fabricated for Solar Cruiser, a SmallSat NASA Pathfinder Mission consisting of 1653 square meter solar sail that would establish an artificial orbit sunward the L1 Lagrange point heliophysics observations. Here we describe optical characterization these birefringent electro-optic including thin film measurements and analysis, hyperspectral bidirectional reflectance distribution function measurements,...