检索结果-南通市图书馆

The alternative of CubeSat-based advanced infrared and microwave sounders for high impact weather forecasting

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2019年第2期12卷 80-90页

作者： LI Zhenglong LI Jun SCHMIT Timothy J. WANG Pei LIM Agnes LI Jinlong NAGLE Fredrick W. BAI Wenguang OTKIN Jason A. ATLAS Robert HOFFMAN Ross N. BOUKABARA Sid-Ahmed ZHU Tong BLACKWELL William J. PAGANO Thomas S. Cooperative Institute for Meteorological satellite Studies University of Wisconsin-Madison center for satellite {2. and Research National Oceanic and Atmospheric Administration National satellite Meteorological center China Meteorological Administration Atlantic Oceanographic and Meteorological Laboratory Ocean and Atmospheric Research/National Oceanic and Atmospheric Administration Cooperative Institute for Marine and Atmospheric Studies University of Miami center for satellite {2. and Research National Oceanic and Atmospheric Administration College Park Cooperative Institute for Research in the Atmosphere Colorado State University Lincoln Laboratory Massachusetts Institute of Technology Jet Propulsion Laboratory California Institute of Technology

The advanced infrared(IR) and microwave(MW) sounding systems have been providing atmospheric sounding information critical for nowcasting and improving weather forecasts through data assimilation in numerical weather prediction. In recent years, advanced IR and MW sounder systems are being proposed to be onboard CubeSats that are much more cost efficient than traditional satellite systems. An impact study using a regional Observing System Simulation Experiment on a local severe storm(LSS) was carried out to evaluate the alternative of using advanced MW and IR sounders for high-impact weather forecasting in mitigating the potential data gap of the Advanced Technology Microwave Sounder(ATMS) and the Cross-track Infrared Sounder(CrIS) on the Suomi-NPP(SNPP) or Joint Polar satellite System(JPSS). It was found that either MicroMAS-2.or the CubeSat Infrared Atmospheric Sounder(CIRAS) on a single CubeSat was able to provide a positive impact on the LSS forecast, and more CubeSats with increased data coverage yielded larger positive ***-2.has the potential to mitigate the loss of ATMS, and CIRAS the loss of CrIS, on SNPP or JPSS, especially when multiple CubeSats are launched. There are several approximations and limitations to the present study, but these represent efficiencies appropriate to the principal goal of the study — gauging the relative values of these sensors.

关键词： OSSE Cubesat sounder high-impact weather

Physical Mechanism of Formation of the Bimodal Structure in the Meiyu Front System

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2005年第12期22卷 3218-3220页

作者：崔晓鹏高守亭宗志平刘文明李小凡 Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 National Meteorological Centre China Meteorological Administration Beijing 100081 Liaoning Meteorological Observatory Liaoning Meteorological Bureau Shenyang 110016 joint center for satellite {2. Assimilation and NOAA/NESDIS/Office of Research and applications Camp Springs Maryland 21029 USA

The bimodal structure of the Meiyu front system is readdressed after Zhou et al.（2.05）. The physical mechanism of the formation of the bimodal distribution is discussed. The bimodal structure of the Melyu front system considerably results from atmospheric moisture gradients, though atmospheric temperature gradients are also not negligible. According to the definition of equivalent potential temperature, and by scale analysis, we find that atmospheric equivalent potential temperature gradients, which could be regarded as an indicator of the Meiyu front system, could be mainly attributed to the variations of atmospheric potential temperature gradients with a scaling factor of 1 and moisture gradients multiplied by a scaling factor of an order of about 2.5 × 10^3, which means that small variations of atmospheric moisture gradients could lead to large variations of equivalent potential temperature gradients, and thus large variations of the Meiyu front system. Quantitative diagnostics with a mesoscale simulation data in the vicinity of the Meiyu front system show that moisture gradients contribute to equivalent potential temperature gradients more than potential temperature gradients.

关键词： SLANTWISE VORTICITY DEVELOPMENT MOIST POTENTIAL VORTICITY ASIANSUMMER MONSOON EAST china SEA SCALE STRUCTURE PART II REGION CONVERGENCE TRANSPORT FEATURES

AC vector magnetometer for space-based applications using low-resource magneto-impedance sensor

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china(Technological Sciences) 2023年第12期66卷 3663-3670页

作者： YU XiangQian HUANG Cong XIAO ChiJie LI JiaWei LIU Si WANG JingDong LI YunPeng QU YaNan WANG YongFu CHEN HongFei ZOU Hong SHI WeiHong ZONG QiuGang CHEN XiaoFei ZHANG XiaoXin ZONG WeiGuo WANG JingSong School of Earth and Space Sciences Peking UniversityBeijing 100871China Key Laboratory of Space Weather National Satellite Meteorological Center(National Center for Space Weather)China Meteorological AdministrationBeijing 100081China Innovation center for Feng-Yun Meteorological satellite(FYSIC) Beijing 100081China School of Physics Peking UniversityBeijing 100871China School of Physics and Electronic Science Changsha University of Science&TechnologyChangsha 410114China center for Space Science and Applied Research Chinese Academy of SciencesBeijing 100190China Institute of Shandong Aerospace Technology Yantai 264003China Shanghai Institute of satellite Engineering(SISE) Shanghai 201108China

This study proposes a novel AC vector magnetometer developed using a low-resource magneto-impedance sensor for china’s Feng-Yun meteorological {2.(FY-3E).It was calibrated and characterized to determine its performance *** total weight of the AC vector magnetometer is 51 g(the aluminum box excluded),while the total power consumption is 310 m *** proposed AC vector magnetometer can detect magnetic field variations in the range of±1000 nT and noise power spectral density of≤50 pT/Hz^(1/2.@1 ***,the proposed device has a maximum nonlinearity of≤0.71‰over the entire range and a nonorthogonality error of 3.07 nT or 0.15%(root mean square).The total dose hardness of the sensor is≥30 krad(Si).Furthermore,we propose the first survey results of a magnetometer equipped aboard a Chinese FY-3E {2. in a Sunsynchronous *** data revealed that the AC vector magnetometer can detect transient physical signals such as quasistatic field-aligned currents(~50 nT)and waves at the auroral *** features render the proposed AC vector magnetometer suitable for space-based applications,particularly those involving the study of geomagnetic activity.

关键词： AC vector magnetometer low-resource magneto-impedance sensor FY-3E satellite

Latest Progress of the Chinese Meteorological satellite Program and Core data Processing Technologies

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2019年第9期36卷 1027-1045页

作者： Peng ZHANG Qifeng LU Xiuqing HU Songyan GU Lei YANG Min MIN Lin CHEN Na XU Ling Sun Wenguang BAI Gang MA Di XIAN Key Laboratory of Radiometric Calibration and Validation for Environmental satellites National Satellite Meteorological CenterChina Meteorological Administration

In this paper,the latest progress,major achievements and future plans of Chinese meteorological satellites and the core data processing techniques are ***,the latest three FengYun(FY)meteorological satellites(FY-2.,FY-3D,and FY-4A)and their primary objectives are introduced Second,the core image navigation techniques and accuracies of the FY meteorological satellites are elaborated,including the latest geostationary(FY-2.4)and polar-orbit(FY-3)***,the radiometric calibration techniques and accuracies of reflective solar bands,thermal infrared bands,and passive microwave bands for FY meteorological satellites are *** also illustrates the latest progress of real-time calibration with the onboard calibration system and validation with different methods,including the vicarious china radiance calibration site calibration,pseudo invariant calibration site calibration,deep convective clouds calibration,and lunar ***,recent progress of meteorological satellite data assimilation applications and quantitative science produce are summarized at *** main progress is in meteorological satellite data assimilation by using microwave and hyper-spectral infrared sensors in global and regional numerical weather prediction ***,the latest progress in radiative transfer,absorption and scattering calculations for satellite remote sensing is summarized,and some important research using a new radiative transfer model are illustrated.

关键词： meteorological satellite geolocation calibration and validation satellite data assimilation radiative transfer model

Retrieval of Significant Wave Height Under Typhoon Conditions from Gaofen-3 SAR Imagery

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of china 2022年第1期21卷 81-90页

作者： WANG Xiaochen HAN Bing ZHONG Lihua YUAN Xinzhe Aerospace Information Research Institute Chinese Academy of ScienceBeijing 100190China Key Laboratory of Technology in Geo-Spatial Information Processing and Application Systems Aerospace Information Research InstituteChinese Academy of ScienceBeijing 100190China The National satellite Ocean applications {2. Beijing 100081China

The objective of this paper is to propose an empirical method to inverse significant wave height(SWH)under typhoon conditions from collected dual-polarization Gaofen(GF)-3 synthetic aperture radar(SAR)*** typhoon scenes were cap-tured from narrow scan(NSC)and wide scan(WSC)images,and collocated with European center for Medium-Range Weather Fore-casts reanalysis data of(ECMWF).To improve the quality of GF-3 SAR images,the recalibration over rainforest and de-scalloping were carried *** establish the empirical relationship between SAR-derived parameters and collocated SWH,the sensitivity analysis of typical parameters about the normalized radar cross section(Nrcs)and imagery variance(Cvar)were performed to both VV and VH polarized *** scenes from GF-3 SAR imagery under typhoon conditions were used for training the model by the multivari-ate least square regression,and one scene was used for preliminary *** was found that the joint retrieval model based on VV and VH polarized SAR imagery performed better than any single polarized *** results,verified by using ECMWF data,revealed the soundness of this approach,with a correlation of 0.95,bias of 0 m,RMSE of 0.44 and SI of 0.01 when VV polarization and VH polarization data were both used.

关键词： Gaofen-3 SAR typhoon significant wave height

FY-3 Meteorological satellites and the applications

在线全文

学校读者我要写书评

暂无评论

空间科学学报 2014年第5期34卷 703-709页

作者： TANG Yunqiu ZHANG Jiashen WANG Jingsong National satellite Meteorological center/National center for Space Weather China Meteorological Administration

FY-3 is the second generation polar-orbiting meteorological satellite of china. The first satellite named FY-3A of this series was launched on 2. May 2.08. The first operational satellite named FY-3C of this series was launched on 2. September, 2.13. The new generation satellites are to provide three-dimensional, quantitative, multi-spectral global remote sensing data under all weather conditions, which will greatly help the operational numerical weather prediction, global climate change research, climate diagnostics and prediction, and natural disaster monitoring. They will also provide help for many other fields such as agriculture, forestry, oceanography and hydrology. With the above-mentioned capability, the FY-3 satellites can make valuable contributions to improving weather forecasts, global natural-disaster and environmental monitoring.

关键词： FY-3 satellites Polar-orbiting satellite Remote sense

Advances in Ecological applications of Fengyun satellite {2.

在线全文

学校读者我要写书评

暂无评论

Journal of Meteorological Research 2021年第5期35卷 743-758页

作者： Xiuzhen HAN Hao GAO Jun YANG Yachun LI Weicheng GENG National satellite Meteorological center China Meteorological AdministrationBeijing 100081 Jiangsu Climate center Jiangsu Provincial Meteorological BureauNanjing 210008

In recent years,the remote sensing based on meteorological satellite observations has become an important tool for assessing global ecological *** the early 2.00,Fengyun(FY)satellite {2. have been widely used to derive the key parameters of ecological environment in *** integrated earth-observation system has been developed in china through using FY satellite {2.,including retrievals the key ecological parameters as well as to constructions of long-term {2. records of vegetation index,land surface temperature,net primary production,vegetation health index,and so *** progress has thus been made in the application and service for prevention of air pollution,management and control of ecological redline,ecological monitoring for the Belt and Road Initiative,and assessment of ecological environment for human *** order to monitor the ecological parameters in real time and with a full dynamic coverage,it is necessary to improve the technology in application of ecological remote sensing from meteorological satellites,and further enhance the ecological meteorological service.

关键词： Fengyun satellite ecological environment remote sensing assessing and monitoring operational service

Spatial-temporal variations of natural suitability of human settlement environment in the Three Gorges Reservoir Area A case study in Fengjie County,china

在线全文

学校读者我要写书评

暂无评论

Frontiers of Earth Science 2019年第1期13卷 1-17页

作者： Jieqiong LUO Tinggang ZHOU Peijun DU Zhigang XU Key Laboratory for satellite Mapping Technology and applications of State Administration of Surveying Mapping and Geoinformation of China Nanjing UniversityNanjing 210023China Jiangsu Provincial Key Labomtory of Geographic Information Science and Technology Nanjing UniversityNanjing 210023China Jiangsu center for CoUabomtive Innovation in Geographical Information resource Development and Application Nanjing 210023China School of Geographical Sciences Southwest UniversityChongqing 400715China Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education) Chongqing 400715China

With rapid environmental degeneration and socio-economie development,the human settlement environment (HSE)has experienced dramatic changes and attracted attention from different ***,the spatial-temporal evaluation of natural suitability of the human settlement environment (NSHSE)has become essential for understanding the patterns and dynamics of HSE,and for coordinating sustainable development among regional populations,resources,and *** study aims to explore the spatialtemporal evolution of NSHSE patterns in 1997,2.05,and 2.09 in Fengjie County near the Three Gorges Reservoir Area (TGRA).A spatially weighted NSHSE model was established by integrating multi-source data (e.g.,census data,meteorological data,remote sensing images,DEM data,and GIS data)into one framework,where the Ordinary Least Squares (OLS)linear regression model was applied to calculate the weights of indices in the NSHSE *** show that the trend of natural suitability has been first downward and then upward, which is evidenced by the disparity of NSHSE existing in the south,north,and central areas of Fengjie County. Results also reveal clustered NSHSE patterns for all 30 ***,NSHSE has significant influence on population distribution,and 71.49% of the total population is living in moderate and high suitable districts.

关键词： natural suitability of human settlement environment ordinary least squares model global and local spatial autocorrelation analyses Three Gorges Reservoir Area (TGRA) Fengjie Cotmty

An improved optical flow method to estimate Arctic sea ice velocity(winter 2.14-2.16)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2021年第12期40卷 148-160页

作者： Haili Li Changqing Ke Qinghui Zhu Xiaoyi Shen Mengmeng Li Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology/Key Laboratory for Land satellite Remote Sensing applications of Ministry of Natural {2.s School of Geography and Ocean ScienceNanjing UniversityNanjing 210023China Collaborative Innovation center of Novel Software Technology and Industrialization Nanjing 210023China Collaborative Innovation center of South china Sea Studies Nanjing 210023China

Sea ice velocity impacts the distribution of sea ice,and the flux of exported sea ice through the Fram Strait increases with increasing ice ***,improving the accuracy of estimates of the sea ice velocity is *** introduce a pyramid algorithm into the Horn-Schunck optical flow(HS-OF)method(to develop the PHS-OF method).Before calculating the sea ice velocity,we generate multilayer pyramid images from an original brightness temperature ***,the sea ice velocity of the pyramid layer is calculated,and the ice velocity in the original image is calculated by layer *** Arctic sea ice velocities from 2.14 to 2.16 are obtained and used to discuss the accuracy of the HS-OF method and PHS-OF(specifically the 2.layer PHS-OF(2.LPHS-OF)and 4-layer PHS-OF(4 LPHS-OF))*** results prove that the PHS-OF method indeed improves the accuracy of sea ice velocity estimates,and the 2.LPHS-OF scheme is more appropriate for estimating ice *** error is smaller for the 2.LPHS-OF velocity estimates than values from the Ocean and Sea Ice satellite Application Facility and the Copernicus Marine Environment Monitoring Service,and estimates of changes in velocity by the 2.LPHS-OF method are consistent with those from the National Snow and Ice data *** ice undergoes two main motion patterns,i.e.,transpolar drift and the Beaufort *** addition,cyclonic and anticyclonic ice drift occurred during winter *** in sea ice velocity are related to the open water area,sea ice retreat time and length of the open water season.

关键词： winter sea ice velocity pyramid Horn-Schunck optical flow(PHS-OF)method transpolar drift Beaufort Gyre open water Arctic