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Meanwhile, experimental X-band airborne SAR data with the same range and azimuth resolution are also processed using the ETSA, where the conventional autofocusing techniques have been smoothly incorporated.
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Surface soil moisture is estimated by inverting physical scattering models for low-vegetation crops using L-band airborne SAR data over the incidence angle range from 30 to 50°.
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Experiments are carried out with six amplitude-format SAR images of various bands, resolutions, and polarizations from Chinese airborne SAR systems, GaoFen-3 (GF-3) satellite, and TerraSAR-X satellite.
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Based on simulation and practical N-SAR (a Chinese airborne SAR system) experiments, the results show that our proposed principle has an efficient performance.
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Airborne Sar sentence examples within Polarimetric Airborne Sar
This study makes use of extensive ground-truth measurements and synchronous high-resolution fully-polarimetric airborne SAR data in L-band to show the impact of the maize row orientation relative to the SAR sensor beam on backscattering measurements and on GAI retrieval accuracy via the WCM.
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Moreover, three P-band fully polarimetric airborne SAR images with non-uniformly distributed baselines were applied to reconstruct the vertical structure of a tropical forest in Mabounie, Gabon.
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Experimental results from a four-channel and a three-channel airborne SAR systems are employed to validate the effectiveness and robustness of the proposed algorithm in practical processing.
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Simulation and real data experiments, including four channel airborne SAR data with a bandwidth of 210 MHz and the Chinese Gaofen-3 dual receiving channel (DRC) spaceborne SAR data, validate the effectiveness of the proposed calibration method, particularly in low signal-to-noise ratio (SNR).
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This study makes use of extensive ground-truth measurements and synchronous high-resolution fully-polarimetric mono- and bistatic airborne SAR data in L-band to assess and compare the sensitivity of mono- and multistatic systems to maize crop variables, soil moisture, and surface roughness.
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Meanwhile, experimental X-band airborne SAR data with the same range and azimuth resolution are also processed using the ETSA, where the conventional autofocusing techniques have been smoothly incorporated.
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Airborne Sar sentence examples within airborne sar system
This configuration simulates the use of a spaceborne/airborne SAR system as a transmitting antenna and multiple ground-based stationary antennae as receiving antennae to obtain omni-directional scattering images.
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The multi-baseline SAR data stacks can be acquired by spaceborne and airborne SAR systems, but for forest scenarios, the data stacks acquired by the airborne SAR system are mostly used.
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Airborne Sar sentence examples within airborne sar image
In this article, a refocusing method of ship target in airborne SAR image though the inverse synthetic aperture radar (ISAR) technique is presented.
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In the paper, we propose a new method based on multi-order superpixel-level saliency and fuzzy logic (MSSFL) to fuse spaceborne and airborne SAR images for vessel detection.
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Airborne Sar sentence examples within airborne sar imaging
This paper mainly studies the airborne SAR imaging of moving ship under low sea state, and proposes a method to estimate ship velocity and achieve focused imaging.
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Therefore, in this paper, the two-dimensional NLFM SAR signal model with Doppler shift is formulated and the influences of Doppler shift on airborne SAR imaging are analysed in detail.
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Airborne Sar sentence examples within airborne sar platform
In addition, due to the low flight height of airborne SAR platforms, the range-dependent phases resulted from the HDs have significant impacts on the TVBE estimation.
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Our approaches is examined on a data set acquired from a Airborne SAR platform with frequencies in L and C bands operating in multiple polarization modes and having a spatial resolution of 1.
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Airborne Sar sentence examples within airborne sar dataset
Airborne Sar sentence examples within airborne sar raw
In order to prevent and mitigate the viral spread, high-performance charged nanofiber filters, spray coating of nanomaterials on surfaces, novel materials for PPE kits and facemasks have been developed that accomplish over 90% capture of airborne SARS-CoV-2.
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This paper documents the COVID Airborne Risk Assessment (CARA) methodology, to assess the potential exposure of airborne SARS-CoV-2 viruses, with an emphasis on the effect of certain virological and immunological factors in the quantification of the risk.
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To compare the resulting IDW refractivity interpolation for airborne SAR applications, all the propagation path losses across Pohang and Heuksando are obtained using the standard atmospheric condition of ∇M = 118 and the observation-based interpolated atmospheric conditions on 15 February 2019.
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This study makes use of extensive ground-truth measurements and synchronous high-resolution fully-polarimetric mono- and bistatic airborne SAR data in L-band to assess and compare the sensitivity of mono- and multistatic systems to maize crop variables, soil moisture, and surface roughness.
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The study of Hamilton and colleagues, to which the article refers, reports two main findings 2 Firstly, administering two types of non-invasive respiratory support to healthy volunteers led to the release of either fewer or no more aerosol particles from the respiratory tract than when coughing, speaking, and breathing normally (for continuous positive airways pressure and high flow nasal oxygen, respectively) [ ]among both healthy volunteers and inpatients with covid-19, numbers of emitted respiratory aerosols seemed higher when coughing than when breathing or speaking Another recent study has also shown the relatively low aerosol generating potential of non-invasive respiratory support 3 And coughing is well documented to produce high numbers of respiratory droplets,4 hence the role of cough in transmitting other respiratory infections including tuberculosis, the archetypal airborne disease 5 The best evidence for airborne (or aerosol) transmission of covid-19 is from outbreaks6 and through the detection of virus in air samples 7 Airborne SARS-CoV-2 has been detected in intensive care units and other general hospital areas 7 What is meant by airborne or aerosol transmission can be confusing,8 but there are now good arguments for promoting measures to reduce inhalation of the smallest droplets by exposed individuals.
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This configuration simulates the use of a spaceborne/airborne SAR system as a transmitting antenna and multiple ground-based stationary antennae as receiving antennae to obtain omni-directional scattering images.
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To detect virus in breath, the Bubbler - a breathalyzer that reverse transcribes RNA from airborne SARS-CoV-2 particles into a sample-specific barcoded cDNA was developed.
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The data indicate that, in addition to African green monkeys, macaques can be successfully infected by airborne SARS-CoV-2, providing viable macaque natural transmission models for medical countermeasure evaluation.
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Results: We included 67 primary studies and 22 reviews on airborne SARS-CoV-2.
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The multi-baseline SAR data stacks can be acquired by spaceborne and airborne SAR systems, but for forest scenarios, the data stacks acquired by the airborne SAR system are mostly used.
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This study validates airborne SAR-derived ALT estimates in three regions of Alaska, USA using calibrated ground penetrating radar (GPR) geophysical data.
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It is critical to understand the risks of airborne SARS-CoV-2 transmission under different epidemiological scenarios and operation strategies for schools to make informed decisions to mitigate infection risk.
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Objectives: We assessed of the risk of illness due to airborne SARS-CoV-2 particles from breathing, speaking, singing, coughing, and sneezing in indoor environments.
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This paper proposes a resource management method of clustered UAV airborne SAR system based on the advanced genetic algorithm (GA).
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As growing evidence of airborne SARS-CoV-2 transmission has been reported worldwide, ventilation is an effective method of reducing the infection probability of SARS-CoV-2.
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This study examined the effect of air filtration and ultra-violet (UV) light sterilisation on detectable airborne SARS-CoV-2 and other microbial bioaerosols.
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Numerical simulations have been used to testify the proposed setup due to the complexities of using experimental investigation such as high cost and clinical hazards of the airborne SARS-CoV-2 in the air.
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To detect virus in breath, the Bubbler—a breathalyzer that reverse-transcribes RNA from airborne SARS-CoV-2 particles into a sample-specific barcoded cDNA—was developed.
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In this article, a refocusing method of ship target in airborne SAR image though the inverse synthetic aperture radar (ISAR) technique is presented.
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We experimentally and numerically investigated an advanced engineering and environmental method on controlling the transmission of airborne SARS-CoV-2-laden aerosols in the breathing microenvironment between two persons during interactive breathing process by combining the limited space air stability and a ventilation method.
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The COVID-19 crisis has led to much discussion about the role and use of masks to protect healthcare workers from inhaling airborne SARS-CoV-2 virus particles: wearing face masks with or without visors and goggles.
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We hypothesized that airborne SARS-CoV-2 would be present in all size fractions, including fine particles, and in a size distribution that differed by sampling location.
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Currently Kr-Cl lamps are the only viable "far-UV-C" sources for full-room inactivation of airborne SARS-CoV-2, the virus responsible for the COVID-19 pandemic1.
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Meanwhile, experimental X-band airborne SAR data with the same range and azimuth resolution are also processed using the ETSA, where the conventional autofocusing techniques have been smoothly incorporated.
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Patients’ symptoms and numbers influence the number of airborne SARS-CoV-2 RNA with PM2.
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In the paper, we propose a new method based on multi-order superpixel-level saliency and fuzzy logic (MSSFL) to fuse spaceborne and airborne SAR images for vessel detection.
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– Use of Airborne SAR for detecting buried archaeology.
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Accordingly, there are two concerns about the exhaled airborne SARS-CoV-2 aerosol emitted from the coughs or sneezes of COVID-19 patients: (1) It might infect healthcare providers in the same confined patient rooms; (2) It might enter the main ventilation system and transmit to other patient room as a health threat.
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Motion compensation is a key step in airborne SAR/InSAR processing, and the availability of accurate external digital elevation models (DEMs) is at the heart of many InSAR applications.
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In the context of the building design, interventions that promote healthy air quality should be adopted, especially in food areas with high-occupancy rates for prolonged times, to help minimize the potential exposure to airborne SARS-CoV-2.
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The DLR Microwaves and Radar Institute conducted an airborne SAR campaign to support the Hydroterra mission.
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To address this problem, this paper proposes a novel deep marginal learning algorithm (DMLA) to implement the dark zone classification of airborne SAR images.
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In addition, due to the low flight height of airborne SAR platforms, the range-dependent phases resulted from the HDs have significant impacts on the TVBE estimation.
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In this work, using the quantitative filter forensics methodology, we estimated an average integrated airborne SARS-CoV-2 concentration of 69 ± 43 copies/m3.
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This paper mainly studies the airborne SAR imaging of moving ship under low sea state, and proposes a method to estimate ship velocity and achieve focused imaging.
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The Uninhabited Aerial Vehicle SAR (UAVSAR) is an airborne SAR system deployed by NASA/JPL that can acquire measurements along user-specified flight paths.
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With the development of many spaceborne and airborne SAR systems, the amount of SAR data and products is increasing rapidly.
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Experiments performed on the airborne SAR (AIRSAR) L-Band and GF-3 C-Band data verify that 1) SPANSDP can detect small ships more accurately than other state-of-the-art methods and 2) [HC] is more effective in improving ship detectors’ detection performances in comparison with [CP].
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Surface soil moisture is estimated by inverting physical scattering models for low-vegetation crops using L-band airborne SAR data over the incidence angle range from 30 to 50°.
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However, the existing airborne SAR location model rarely considers the effect of residual motion error.
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A model was developed for two Scenarios: an ambulance transport with a patient actively emitting a virus in small aerosols that could lead to airborne transmission (Scenario 1) and a subsequent transport with the same respirator or mask use conditions, an uninfected patient; and remaining airborne SARS-CoV-2 and contaminated surfaces due to aerosol deposition from the previous transport (Scenario 2).
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This study assessed the feasibility of using high-flowrate air samplers combined with RNA extraction kit designed for environmental sample to perform airborne SARS-CoV-2 surveillance in hospital setting, tested by RT-qPCR.
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While the airborne SARS-CoV-2 primarily affects the lungs, viremia is not uncommon.
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