A5038496393- Marine and coastal ecosystems
- Remote-Sensing Image Classification
- Gamma-ray bursts and supernovae
- Atmospheric and Environmental Gas Dynamics
- Remote Sensing in Agriculture
- Geochemistry and Geologic Mapping
- Remote Sensing and LiDAR Applications
- Remote Sensing and Land Use
- Astrophysics and Cosmic Phenomena
- Soil Geostatistics and Mapping
- Marine and coastal plant biology
- Atmospheric Ozone and Climate
- Pulsars and Gravitational Waves Research
- Oceanographic and Atmospheric Processes
- Calibration and Measurement Techniques
- Coral and Marine Ecosystems Studies
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Water Quality Monitoring and Analysis
- Radio Astronomy Observations and Technology
- Atmospheric aerosols and clouds
- Infrared Target Detection Methodologies
- Marine and fisheries research
- Astronomy and Astrophysical Research
United States Naval Research Laboratory
2012-2024
K Lab (United States)
2012-2023
Universidad del Salvador
2022
Universidad de Oviedo
2015-2017
Naval Research Laboratory Remote Sensing Division
2010-2016
Behavioral Tech Research, Inc.
2005
Office of Naval Research
2004
University of California, Berkeley
2001
Infrared Processing and Analysis Center
2001
California Institute of Technology
2001
▪ Abstract Study of radio supernovae over the past 20 years includes two dozen detected objects and more than 100 upper limits. From this work it is possible to identify classes properties, demonstrate conformance deviations from existing models, estimate density structure circumstellar material and, by inference, evolution presupernova stellar wind, reveal last stages before explosion. It also detect ionized hydrogen along line sight, binary properties system, show clumpiness material. More...
A spectrum-matching and look-up-table (LUT) methodology has been developed evaluated to extract environmental information from remotely sensed hyperspectral imagery. The LUT works as follows. First, a database of remote-sensing reflectance (Rrs) spectra corresponding various water depths, bottom spectra, water-column inherent optical properties (IOPs) is constructed using special version the HydroLight radiative transfer numerical model. Second, measured Rrs spectrum for particular image...
Existing atmospheric correction algorithms for multichannel remote sensing of ocean color from space were designed retrieving water-leaving radiances in the visible over clear deep areas and cannot easily be modified retrievals turbid coastal waters. We have developed an algorithm hyperspectral with near-future Coastal Ocean Imaging Spectrometer. The uses look-up tables generated a vector radiative transfer code. Aerosol parameters are determined by spectrum-matching technique that channels...
Abstract The NASA Cloud, Aerosol, and Monsoon Processes Philippines Experiment (CAMP 2 Ex) employed the P-3, Stratton Park Engineering Company (SPEC) Learjet 35, a host of satellites surface sensors to characterize coupling aerosol processes, cloud physics, atmospheric radiation within Maritime Continent’s complex southwest monsoonal environment. Conducted in late summer 2019 from Luzon, Philippines, conjunction with Office Naval Research Propagation Intraseasonal Tropical Oscillations...
We describe progress in the development of a multiple quan- tum well modulating retroreflector, including description recent dem- onstrations an infrared data link between small rotary-wing un- manned airborne vehicle and ground-based laser interrogator using device designed fabricated at Naval Research Laboratory (NRL). Modulating retroreflector systems couple optical such as corner cube, electro-optic shutter to allow two-way communications laser, telescope, pointer-tracker on only one...
Hyperion is a hyperspectral sensor on board NASA's EO-1 satellite with spatial resolution of approximately 30 m and swath width about 7 km. It was originally designed for land applications, but its unique spectral configuration (430 nm - 2400 ~10 resolution) high make it attractive studying complex coastal ecosystems, which require such accurate retrieval environmental properties. In this paper, data over an area the Florida Keys used to develop test algorithms atmospheric correction...
Overcoming significant technical and human difficulties, Zara recently deployed a new process that relies extensively on sophisticated operations research models to determine each inventory shipment it sends from its two central warehouses 1,500 stores worldwide. By taking retail size-assortment view of store's inventory, the model incorporates link between stock levels demand select store replenishment quantities. Through rigorous, controlled field experiment, we estimate this has increased...
The present operational atmospheric correction algorithm for multichannel remote sensing of ocean color using imaging data acquired with the Moderate Resolution Imaging Spectroradiometer (MODIS) works well over clear but can give incorrect results brighter coastal waters. This is because: 1) turbid waters are not dark two channels centered near 0.75 and 0.86 mum; 2) (0.488, 0.531, 0.551 mum) often saturate bright Here, we describe an a modification our previously developed hyperspectral that...
The wavelength dependence of the dominant directional reflective properties beach sands was demonstrated using principal component analysis and related correlation matrix. In general, we found that hyperspectral bidirectional reflectance distribution function (BRDF) has weak dependence. Its BRDF varies slightly in three broad regions. variations are more evident surfaces greater visual roughness than smooth surfaces. sand can be captured regions instead hundreds individual wavelengths.
We present new radio observations of the supernova SN 1979C made with Very Large Array (VLA) at 20, 6, 3.6, and 2 cm from 1991 July to 1998 October, which extend our previously published (Weiler et al.), began 8 days after optical maximum in 1979 April continued through 1990 December. find that emission has stopped declining flux density manner described by Weiler al. apparently entered a stage evolution. The observed "flattening," or possible brightening, light curves for is interpreted as...
In this paper, we examine the accuracy of manifold coordinate representations as a reduced representation hyperspectral imagery (HSI) lookup table (LUT) for bathymetry retrieval. We also explore on more limited basis potential using these coordinates modeling other in water properties. Manifold are chosen because they data-driven intrinsic set coordinates, which naturally parameterize nonlinearities that present HSI scenes. The approach is based extraction dimensionality sufficiently large...
This paper presents a practical method for the development of spectral reflectance libraries under sub-optimal sky conditions. Although there are commercially available spectrometers which simultaneously measure both downwelling and upwelling radiance to mitigate impact conditions, these only record in visible near infra-red. There presently no with this capability that can through short-wave recording processing data using coordinated measurements from two full-range discusses potential...
New observations of the supernova SN 1980K made with VLA at 20 cm and 6 from 1994 April through 1996 October show that it has undergone a significant change in its radio emission evolution, dropping by factor ~2 below flux density S ∝ t-0.73 power-law decline time t observed earlier. However, although all frequencies decreased significantly, current spectral index α = -0.42 ± 0.15 (S ν+α) is consistent previous -0.60−0.07+0.04.
The Hyperspectral Imager for the Coastal Ocean (HICO) presently onboard International Space Station (ISS) is an imaging spectrometer designed remote sensing of coastal waters. instrument not equipped with any spectral and radiometric calibration devices. Here we describe vicarious techniques that have been used in converting HICO raw digital numbers to calibrated radiances. based on matching atmospheric water vapor oxygen absorption bands extraterrestrial solar lines. comparisons between...
Long-term monitoring of the radio emission from supernovae with Very Large Array (VLA) shows that "light curves" evolve in a systematic fashion distinct peak flux density (and thus, combination distance, spectral luminosity) at each frequency and well-defined time explosion to peak. Studying these two quantities 6 cm wavelength, luminosity (L6 peak), after date (t0) reach (t6 - t0), we find they appear related. In particular, based on objects, Type Ib may be approximate "standard candles" L6...
The unusual supernova SN 1998bw, which is thought to be related the gamma-ray burster GRB 980425, a possible link between these two classes of objects. Analyzing extensive radio emission data available for we are able describe its time evolution within well-established framework analysis from supernovae. This then allows description number physical properties object. can best explained as interaction mildly relativistic (Γ ~ 1.6) shock with dense, preexplosion stellar wind-established...
We previously developed an algorithm for remote sensing of ocean color from space that allows quick atmospheric correction hyperspectral data using lookup tables generated with a modified version Ahmad & Fraser's vector radiative transfer code. During the past year we extended our calculations, allowing us to generate several airborne altitudes. also lookup-table software interpolate sensor altitudes between those specified in new tables. Here, present results corrections and on imagery...
This paper describes a portable hyperspectral goniometer system for measurement of hemispherical conical reflectance factor (HCRF) data terrestrial applications, especially in the coastal zone. system, Goniometer Portable Hyperspectral Earth Reflectance (GOPHER), consists computer-controlled Spectra Vista Corporation HR-1024 full-range spectrometer mounted on rotating arc and track assembly, allowing complete coverage zenith azimuth full hemisphere recording HCRF. The control software allows...
:Introduction of nonindigenous species (NIS) via anthropogenic activities (i.e. shipping) has serious consequences for marine ecosystems. On shores the Cantabrian Sea (northern Spain), there is no routine NIS screening combining molecular and anatomical methods. This makes detection inadvertent expansions exotic difficult. In this work, a nonfoliose Grateloupia specimens morphological DNA barcoding procedures (COI-5P rbcL genes) was conducted in marina Gijón, Bay Biscay. A reproductive...
Here we present a machine-learning-based method for utilizing traditional ocean-viewing satellites to perform automated atmospheric correction of nanosatellite data. These sensor convolution techniques are required because nanosatellites do not usually possess the wavelength combinations atmospherically correct upwelling radiance data oceanographic applications; however, provide superior ground-viewing spatial resolution (~3 m). Coincident multispectral from Suomi National Polar-Orbiting...
The Hyperspectral Imager for the Coastal Ocean (HICO) is a new hyperspectral sensor that will be housed on International Space Station (ISS). low-cost, rapid-development was built by Naval Research Laboratory (NRL). NRL also responsible mission planning and operational data processing this sensor. HICO sponsored funded Office of (ONR) within its Innovative Prototype (INP) program. integrated flown with support from under direction Department Defense Test Program. first spaceborne optimized...