A5088836827- Atmospheric aerosols and clouds
- Marine and coastal ecosystems
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Remote Sensing in Agriculture
- Remote Sensing and Land Use
- Air Quality and Health Impacts
- Calibration and Measurement Techniques
- Climate variability and models
- Video Surveillance and Tracking Methods
- Oceanographic and Atmospheric Processes
- Robotics and Sensor-Based Localization
- Cephalopods and Marine Biology
- Cryospheric studies and observations
- Meteorological Phenomena and Simulations
- Robotic Path Planning Algorithms
- Infrared Target Detection Methodologies
- Aeolian processes and effects
- Optical Polarization and Ellipsometry
- Opinion Dynamics and Social Influence
- Geology and Paleoclimatology Research
- Remote-Sensing Image Classification
- Advanced Computational Techniques and Applications
- Laser-Matter Interactions and Applications
Goddard Space Flight Center
2019-2025
Science Systems and Applications (United States)
2019-2025
Xiangya Hospital Central South University
2022-2024
Central South University
2022-2024
Zhejiang Ocean University
2024
Hunan Agricultural University
2024
Shanghai Civil Aviation College
2024
Shanghai Ocean University
2024
Shaanxi University of Science and Technology
2024
Shanghai University
2023
Passive ocean color images have provided a sustained synoptic view of the distribution optical properties and biogeochemical parameters for past twenty-plus years. These revolutionized our ocean. Remote sensing has relied on measurements radiance emerging at top atmosphere, thus neglecting polarization vertical components. Ocean remote utilizes intensity spectral variation visible light scattered upward from beneath surface to derive concentrations constituents inherent within layer. However...
Ocean color remote sensing is an important tool to monitor water quality and biogeochemical conditions of ocean.Atmospheric correction, which obtains water-leaving radiance from the total measured by satellite-borne or airborne sensors, remains a challenging task for coastal waters due complex optical properties aerosols ocean waters.In this paper, we report research algorithm on aerosol retrieval with emphasis waters, uses coupled atmosphere radiative transfer model fit polarized...
Abstract Throughout nature, elegant biophotonic structures have evolved into sophisticated arrangements of pigments and structural reflectors that manipulate light in the skin, cuticles, feathers fur animals. Not many spherical are known those described often angle dependent or spectrally tuned. White scattering by flexible skin cuttlefish ( Sepia officinalis ) is examined how unique structure composition leucophore cells serve as physiologically passive approximating optical properties a...
Abstract. In this paper, we present aerosol retrieval results from the ACEPOL (Aerosol Characterization Polarimeter and Lidar) campaign, which was a joint initiative between NASA SRON – Netherlands Institute for Space Research. The campaign took place in October–November 2017 over western part of United States. During six different instruments were deployed on ER-2 high-altitude aircraft, including four multi-angle polarimeters (MAPs): SPEX airborne, Airborne Hyper Angular Rainbow (AirHARP),...
Abstract. NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission, scheduled for launch in the timeframe of 2023, will carry a hyperspectral scanning radiometer named Ocean Color Instrument (OCI) and two multi-angle polarimeters (MAPs): UMBC Hyper-Angular Rainbow Polarimeter (HARP2) SRON Spectro-Polarimeter Planetary EXploration one (SPEXone). The MAP measurements contain rich information on microphysical properties aerosols hydrosols therefore can be used to retrieve accurate...
We developed a fast and accurate polynomial based atmospheric correction (POLYAC) algorithm for hyperspectral radiometric measurements, which parameterizes the path radiances using aerosol properties retrieved from co-located multi-wavelength multi-angle polarimeter (MAP) measurements. This has been applied to spectrometer planetary exploration (SPEX) airborne research scanning (RSP) where SPEX was used as proxy of radiometers, RSP MAP. The remote sensing reflectance obtained POLYAC is when...
Disappearing act Unlike coastal regions and reefs, the open ocean is mostly empty. Many fish species, nonetheless, spend most of their lives there. Such emptiness makes camouflage exceedingly difficult, so how does an organism hide in water filled with bouncing reflected light? Brady et al. show that some families have evolved skin reflects polarizes light, allowing them to blend into mirrorlike conditions more easily. These results help explain silvery coloration found sea-living across...
An unusual "triple-dip" La Niña, described in Sidebar 3.1, had continuing, wide-spread ramifications for the state of ocean and climate 2022.Triple-dip Niñas are not unprecedented, but until now have always followed an extreme El Niño.Anomalously low sea-surface temperatures (SSTs) eastern tropical Pacific persisted from August 2020 through December 2022, with only a brief intermission May-July 2021.Strengthened easterly trade winds drove anomalously strong westward surface currents brought...
The white stripes of the pyjama squid (Sepioloidea lineolata) contain multilayer reflectors with an unordered plate arrangement, enabling reflectance diffuse light over a range viewing angles. Ultrastructural analysis and mathematical modeling are employed to elucidate functional mechanisms reflectance. This optical system may provide bio-inspired template for low-energy, reflectance-based synthetic displays. As service our authors readers, this journal provides supporting information...
Abstract. Ocean color remote sensing is a challenging task over coastal waters due to the complex optical properties of aerosols and hydrosols. In order conduct accurate atmospheric correction, we previously implemented joint retrieval algorithm, hereafter referred as Multi-Angular Polarimetric coLor (MAPOL) obtain aerosol water-leaving signal simultaneously. The MAPOL algorithm has been validated with synthetic data generated by vector radiative transfer model, good performance demonstrated...
Abstract. NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission, scheduled for launch in the time frame of late 2022 to early 2023, will carry Ocean Color Instrument (OCI), a hyperspectral scanning radiometer, and two multiangle polarimeters (MAPs), UMBC Hyper-Angular Rainbow Polarimeter 2 (HARP2) SRON Spectro-Polarimeter Planetary EXploration one (SPEXone). One purpose PACE MAPs is better characterize aerosol properties, which can then be used improve atmospheric correction...
Remote sensing measurements from multi-angle polarimeters (MAPs) contain rich aerosol microphysical property information, and these sensors have been used to perform retrievals in optically complex atmosphere ocean systems. Previous studies concluded that, generally, five moderately separated viewing angles each spectral band provide sufficient accuracy for retrievals, with performance gradually saturating as are added above that threshold. The Hyper-Angular Rainbow Polarimeter (HARP)...
Snow is a crucial element in the Earth’s system, but snow depth and mass are very challenging to be measured globally. Here, we provide theoretical foundation for deriving directly from space-borne lidar (ICESat-2) multiple scattering measurements first time. First, based on Monte Carlo radiative transfer simulations of ICESat-2 532-nm laser light propagation snow, find that backscattering path length follows Gamma distribution. Next, derive three simple analytical equations compute average,...
Abstract We present the first Spectropolarimeter for Planetary EXploration ‐ one (SPEXone) aerosol retrieval results over land and ocean using Remote sensing of Trace gas Aerosol Products algorithm, covering period 23 February–31 August 2024. validate retrieved Optical Depth (AOD), Angstrom Exponent (AE), Single Scattering Albedo (SSA) with AErosol RObotic NETwork (AERONET) data. The validation show that SPEXone provides products good quality, comparable performance ocean. For AOD,...
Over the past year, Hyper-Angular Rainbow Polarimeter (HARP2) multi-angle imaging polarimeter instrument on NASA Plankton Aerosol Cloud ocean Ecosystem (PACE) mission observed entire Earth every two days. HARP2 measures total and polarized radiances over four spectral channels (440/550/670/870 nm), at up to 90 distinct viewing directions, a 114° field-of-view (1550 km cross-track swath). This large volume of daily information requires new approaches on-orbit operations, data...
Although “land” is not included the acronym for NASA’s Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite, mission actively supporting terrestrial science. Two new global, daily product suites were recently released using land data from PACE’s Ocean Color Instrument (OCI). The first, termed SFREFL, a hyperspectral collection of surface reflectances ultraviolet into shortwave infrared. SFREFL currently employs L2gen atmospheric correction,...
The NASA Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission, successfully launched on February 8, 2024, with aims to advance our understanding of global ecology, biogeochemistry, atmospheric aerosols, and clouds. PACE features cutting-edge instruments, including the Ocean Color Instrument (OCI), a hyperspectral scanning radiometer, two Multi-Angle Polarimeters (MAPs): UMBC Hyper-Angular Rainbow Polarimeter (HARP2) SRON Spectro-Polarimeter for Planetary EXploration one (SPEXone). These...
The top-of-atmosphere (TOA) radiation field from a coupled atmosphere-ocean system (CAOS) includes contributions the atmosphere, surface, and water body. Atmospheric correction of ocean color imagery is to retrieve water-leaving radiance TOA measurement, which bio-optical properties can be obtained. Knowledge absolute relative magnitudes signal in important for designing new atmospheric algorithms developing retrieval biogeochemical parameters. In this paper we present systematic sensitivity...
Abstract. In the fall of 2017, an airborne field campaign was conducted from NASA Armstrong Flight Research Center in Palmdale, California, to advance remote sensing aerosols and clouds with multi-angle polarimeters (MAP) lidars. The Aerosol Characterization Polarimeter Lidar (ACEPOL) jointly sponsored by Netherlands Institute for Space (SRON). Six instruments were deployed on ER-2 high-altitude aircraft. Four MAPs: Airborne Hyper Angular Rainbow (AirHARP), Multiangle SpectroPolarimetric...
A radiative transfer simulator was developed to compute the synthetic data of all three instruments onboard NASA’s Plankton Aerosol, Cloud, ocean Ecosystem (PACE) observatory, and at top atmosphere (TOA). The instrument suite includes color (OCI), Hyper-Angular Rainbow Polarimeter 2 (HARP2), Spectro-Polarimeter for Planetary Exploration 1 (SPEXone). PACE is wrapped around a monochromatic model based on successive order scattering (RTSOS), which accounts coupling, polarization, gas...
Purpose This study aimed to explore the relationship between serum testosterone levels and systemic immune-inflammation index (SII). Methods Complete SII data of men over 20 years age were retrieved from 2011–2016 National Health Nutrition Examination Survey conduct a prevalence survey. To calculate SII, platelet count was multiplied by neutrophil-to-lymphocyte ratio. Isotope dilution liquid chromatography tandem mass spectrometry employed measure concentration. Testosterone deficiency (TD)...
Abstract. Multi-angle polarimetric (MAP) measurements can enable detailed characterization of aerosol microphysical and optical properties improve atmospheric correction in ocean color remote sensing. Advanced retrieval algorithms have been developed to obtain multiple geophysical parameters the atmosphere–ocean system. Theoretical pixel-wise uncertainties based on error propagation used quantify performance determine quality data products. However, standard techniques high-dimensional...