The new Ku-band scatterometer (HSCAT-B) onboard the HY-2B satellite was launched on October 25, 2018, and soon after C-band (Advanced Scatterometer (ASCAT)-C) MetOp-C November 6, 2018. This article aims to validate sea surface wind products from them, also summarize common issues in current products. Thus, other data are used for comparisons, including MetOp-B/ASCAT, SCATSAT-1/OSCAT2 HY-2A/SCAT winds. In this study, were each reproduced using same procedures, terms of backscatter...

Atmospheric fine particulate matter (particulate with an aerodynamic diameter ≤ 2.5 μm in ambient air; PM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2.5</sub> ) is a major pollutant causing regional air pollution and harm to human health. To monitor , Chinese industry authorities use data from small number of fixed stations uneven distribution. Pollution control promoted through assessment enforcement, which can include industry-wide...

With the development of deep learning (DL), research on ship classification in synthetic aperture radar (SAR) images has made remarkable progress. However, such primarily focused classifying large ships with distinct features, as cargo ships, containers, and tankers. The SAR fishing vessels is extremely challenging because two main reasons: 1) small size minor interclass differences make fine-grained features difficult, 2) determining vessel types resulting a lack labeled data. Hence, after...

As the global climate changes, there is an increasing focus on oceans and their protection exploitation. However, exploration of necessitates construction marine equipment, siting such equipment has become a significant challenge. With ongoing development computers, machine learning using remote sensing data proven to be effective solution this problem. This paper reviews history technology, introduces conditions required for site selection through measurement analysis, uses cluster analysis...

The Chinese HY-2D satellite was launched on 19 May 2021, carrying a Ku-band scatterometer. Together with the operating scatterometers onboard HY-2B and HY-2C satellites, HY-2 series scatterometer constellation built, constituting different orbits hence opportunity for mutual intercomparison intercalibration. To achieve intercalibration of backscatter measurements these scatterometers, this study presents performs three methods including: (1) direct comparison using collocated measurements,...

The azimuth cutoff wavelength of SAR is an important parameter for retrieval sea surface wind and wave. Earlier studies have fully demonstrated the substantial dependence on polarization, but present only focus H-V linear polarization bases (HH, HV/VH, VV) without considering effects other (e.g., rotated, circular, elliptical polarization). Benefiting from quad-polarization advantage GaoFen-3 wave mode data support basis transformation theory, this study used 4,648 to correlation between...

Rice false smut (RFS) is a late-onset fungal disease that primarily affects rice panicle in recent years. Severe RFS can decrease the yield by 20–30% and severely affect quality. This research used hyperspectral remote sensing data from unmanned aerial vehicles (UAV). On basis of genetic algorithm combined with partial least squares to select feature bands, this paper creates new method use Pearson correlation coefficient Instability Index between Classes (ISIC) further characteristic which...

The HY-2B scatterometer (HSCAT-B) has now completed a one-year orbit. instrument was declared operational after six months of in-orbit testing. ocean wind field products are routinely being made available to the global science community. will work with HY-2A provide Ku-band sea surface observations on long-term scale, and this collaboration is expected be important for disaster prevention mitigation, as well globally focused climate change research. However, obtain reasonable evaluations...

Carbon sequestration refers to the technology of capturing carbon and storing it safely instead directly discharging CO 2 into atmosphere. Rock salt is a promising reservoir, underground rock structure formed by cavern reservoirs in geological history has natural sealing function. Storing dioxide caves can ensure that stably stored for long time. However, at present, there are few studies on abandoned caves. This study analyses characteristics carbonate-evaporite strata high fold zone...

The Chinese HY-2A satellite microwave scatterometer (HSCAT) is designed to measure the ocean surface wind vector with a large observation swath. HSCAT Ku-band that has continuously observing earth's for more than 6 years. Approximately, 30 000 orbit revolutions of scientific data are archived in its ground application system. To further understand characteristics instrument, deeper analyses these must be carried out. Currently, geolocation accuracy normalized radar cross section (NRCS) yet...

The research constructed a retrieval algorithm of routine wind fields for microwave scatterometer onboard HY-2A (HY-2A/SACT). To prepare the sigma0 measurements conducting vectors retrieval, time ordered L1B product was regrouped to sub-track aligned vector cells (WVCs). Besides, authors utilized an extension land and ice mask simplify surface flag process. maximum-likelihood estimator (MLE) applied retrieve each WVC with NSCAT-2 as geophysical model function (GMF). Furthermore, greatly...

Based on the residual turbulent scintillation theory, Mie-scattering lidar can measure intensity of atmospheric turbulence by detecting light index laser return signal. In order to evaluate and optimize reliability system for turbulence, appropriate parameters are selected optimized using theory. Then, Fourier transform method is employed perform numerical simulation phase screen transformation vertical transmission path turbulence. The simulation, low-frequency optimization, calculation...

Study on sea clutter is highly important in the field of maritime surveillance. The physical mechanism complex and there are many influencing factors, among which grazing angle one most important. To address problem determining suitability models clutter, this study performed a comprehensive goodness-of-fit (GoF) analysis six using five methods at different angles, bands, azimuths. Furthermore, to improve description amplitude, we proposed new parameter representation method. parameters can...

HY-2B satellite is launched on 25 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> Oct, 2018 at Taiyuan launch center. It carried four main payloads: radar altimeter, microwave scatterometer, scanning radiometer, and corrected radiometer. scatterometer (HY-2B/SCAT) a pencil-beam rotating which simillar to HY-2A (HY-2A/SCAT). in the same orbit of HY-2A, about 30 min ahead HY-2A. The started work October, after days testing. performance...

Abstract The densities of CO 2 -deionized water were investigated by a magnetic suspension balance (MSB) at the practical conditions geologic sequestration with pressures range from 10 to 18 MPa, temperatures 333.15 413.15 K, and C0 mole fractions up 0.0126 according solubility in water. experimental results -free deionized C02-deionized different revealed that density contact C02 is higher than pure aqueous solution increases increasing pressure concentration almost linearly, while...

This paper presents summertime measurement data of air temperature, globe temperature and pavement surface in the pedestrian street a southern city (Nanning) China. Thermal comfort solar shading effect passage space arcade buildings were analyzed. Characteristics variation also discussed. Based on analysis results, effective strategies proposed for improving thermal environment street.