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2008 Microwave Radiometry and Remote Sensing of the Environment最新文献

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Neural-Network based algorithm for ice concentration retrievals from satellite passive microwave data 基于神经网络的卫星无源微波冰浓度反演算法
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579499
L. Bobylev, E. Zabolotskikh, L. Mitnik, O. Johannessenn
{"title":"Neural-Network based algorithm for ice concentration retrievals from satellite passive microwave data","authors":"L. Bobylev, E. Zabolotskikh, L. Mitnik, O. Johannessenn","doi":"10.1109/MICRAD.2008.4579499","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579499","url":null,"abstract":"Present algorithms for observing the multiyear ice cover are not accurate in multiyear fraction calculations, which is a significant disadvantage of the present system of global ice monitoring considering the fact that multiyear ice is one of the key indicators of changes in the Arctic climate. In this research regionally differing Neural Networks (NN)-based algorithms for total and multiyear Arctic sea ice concentration retrievals from Special Sensor Microwave Imager (SSM/I) data are developed using closed scheme of the numerical experiment. Era-40 Reanalysis data on atmospheric parameter profiles and sea ice temperature are used for the numerical integration of the radiation transfer of the microwave emission in the Atmosphere-Ocean-Ice System. The data on cloud liquid water content and cloud boundaries are modeled basing on the results of Arctic SHEBA experiment. Numerical values for first year and multiyear ice emissivities are taken from published experimental data. The calculated radiometer brightness temperature values are used for NN-based theoretical algorithm development. New weather filter is defined. The algorithms are validated for stable winter conditions using collocated SSM/I data and Synthetic Aperture Radar (SAR) images, classified by an ice expert.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132421388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
High precision and high resolution global precipitation map from satellite data 高精度、高分辨率全球卫星降水图
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579485
K. Okamoto, N. Takahashi, K. Iwanami, S. Shige, T. Kubota
{"title":"High precision and high resolution global precipitation map from satellite data","authors":"K. Okamoto, N. Takahashi, K. Iwanami, S. Shige, T. Kubota","doi":"10.1109/MICRAD.2008.4579485","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579485","url":null,"abstract":"The five year research project, ldquoThe Global Satellite Mapping of Precipitation (GSMaP)rdquo sponsored by Japan Science and Technology Agency(JST) ended in March 2008. The research project aimed at developing microwave radiometer rain rate retrieval algorithms based on the reliable physical models of precipitations and producing high precision and high resolution global precipitation maps only from the satellite data. This paper reviews the research activities of GSMaP.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132226347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
The impact of the number of bits in digital beamforming real aperture and synthetic aperture radiometers 数字波束形成实孔径和合成孔径辐射计中位元数的影响
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579476
X. B. Lluís, I. R. Pérez, Adriano Camps, J. Hernández, N. R. Álvarez, E. Valencia, M. Vericat, M. A. Guerrero
{"title":"The impact of the number of bits in digital beamforming real aperture and synthetic aperture radiometers","authors":"X. B. Lluís, I. R. Pérez, Adriano Camps, J. Hernández, N. R. Álvarez, E. Valencia, M. Vericat, M. A. Guerrero","doi":"10.1109/MICRAD.2008.4579476","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579476","url":null,"abstract":"This work analyzes the number of bits required in a digital radiometer with beamforming focusing on the integration time and on the relationship between the signalpsilas standard deviation and the ADC conversion window. Results are obtained from a particular topology (PAU-SEOSAT/INGENIO [1]), but can be applied to any digital radiometer and to future synthetic aperture radiometers missions.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116275003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Development of a 22 GHz correlating radiometer for the observation of stratospheric water vapor 用于平流层水汽观测的22 GHz相关辐射计的研制
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579489
C. Straub, A. Murk, N. Kampfer, D. Zardet, B. Stuber
{"title":"Development of a 22 GHz correlating radiometer for the observation of stratospheric water vapor","authors":"C. Straub, A. Murk, N. Kampfer, D. Zardet, B. Stuber","doi":"10.1109/MICRAD.2008.4579489","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579489","url":null,"abstract":"We present the overall design, first ideas for the calibration concept and first measurements of a new campaign radiometer for the observation of stratospheric water vapor. The specialities of this instrument are its compact optical system and its correlation receiver with a high resolution digital spectrometer.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121430234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Specialized RFI filter for synthetic aperture radiometers and performance with 2D-STAR 专门的RFI滤波器合成孔径辐射计和性能与2D-STAR
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579477
M. Haken, D. L. Le Vine
{"title":"Specialized RFI filter for synthetic aperture radiometers and performance with 2D-STAR","authors":"M. Haken, D. L. Le Vine","doi":"10.1109/MICRAD.2008.4579477","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579477","url":null,"abstract":"A study was conducted to determine if using the non-zero spacing channels (visibilities) in synthetic aperture radiometers could help with the detection of radio frequency interference (RFI) at L-band. The study was conducted using RFI filters developed for the airborne synthetic aperture radiometers ESTAR and 2D-STAR and data collected with 2D-STAR. The ESTAR filter employed a combined threshold/change detector on the total power (zero spacing in the synthetic aperture radiometers). The new approach taken for the 2D-STAR filter employs a threshold on the maximum of all non-zero spacing visibilities in a sample. The filter using all visibilities demonstrated a significant performance advantage, with lower incidence of both missed detections and false detections than the filter using total power.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127695779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radiometric observations of vines from the green period to the withering 藤蔓从青涩期到枯萎期的辐射观测
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579515
A. Monerris, M. Vall-llossera, Adriano Camps, M. Piles
{"title":"Radiometric observations of vines from the green period to the withering","authors":"A. Monerris, M. Vall-llossera, Adriano Camps, M. Piles","doi":"10.1109/MICRAD.2008.4579515","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579515","url":null,"abstract":"The SMOS REFLEX 2006 field experiment aimed to monitor changes in the L-band (1.4 GHz) emission of vineyards as a function of the plants development. The experiment site was the Valencia Anchor Station, which has been selected as a calibration/validation site for the ESApsilas Soil Moisture and Ocean Salinity (SMOS) mission. This paper presents SMOS REFLEX 2006 and shows the temporal variation of the emissivity. The daily emission decreases from dusk till dawn and then increases again in the daylight hours. This oscillation in the emissivity has a peak to peak variation up to 0.05 (~ 15 K in brightness temperature). Emissivity decreases with time, especially at H-polarisation, due to the increase in the vegetation water content before harvest, and to the increase in soil moisture due to rain events after harvest. The contribution of soil to the measured emissivity is larger after harvest and at incidence angles smaller than 55deg . In this case, an increase in the rock-fraction decreases the mean range of emissivity up to 68%.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"921 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132055694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A compact airborne G-band (183 GHz) water Vapor Radiometer and retrievals of liquid cloud parameters from coincident radiometer and millimeter wave radar measurements 一个紧凑的机载g波段(183 GHz)水蒸气辐射计和从同步辐射计和毫米波雷达测量数据中获取的液态云参数
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579473
A. Pazmany, M. Wolde
{"title":"A compact airborne G-band (183 GHz) water Vapor Radiometer and retrievals of liquid cloud parameters from coincident radiometer and millimeter wave radar measurements","authors":"A. Pazmany, M. Wolde","doi":"10.1109/MICRAD.2008.4579473","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579473","url":null,"abstract":"ProSensing Inc. has developed a G-band (183 GHz, 1.5 mm wavelength) water Vapor Radiometer (GVR) for measuring low concentrations of atmospheric water vapor and liquid water. Using four double sideband receiver channels, the instrument measures brightness temperature at 183.31 +-1, +-3, +-7 and +-14 GHz . An airborne version of the instrument, packaged and wired to operate from a standard PMS probe canister, was successfully tested onboard the National Research Council of Canada Convair-580 aircraft during the Canadian CloudSat and CALIPSO validation flights (C3VP) through the winter of 2006-07. The Zenith G-band radiometer brightness temperature data collected with the GVR were complemented with co-located cloud reflectivity measurements with the NRC W and X-band (NAWX) radar system and in situ probes. By flying the aircraft in a stepped and porpoising ascent/descent patterns, liquid cloud water content was estimated from the GVR retrieved liquid water path. The effective radius and number density of liquid clouds were then estimated by combining the liquid water content with the W-band radar reflectivity factor (Z) and by applying a small correction factor, based on the characteristic drop size distribution shape of the observed cloud.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"18 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128429870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Comparison of ground-based millimeter-wave observations in the arctic winter 北极冬季地面毫米波观测比较
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579504
D. Cimini, F. Nasir, E. Westwater, V. Payne, D. Turner, E. Mlawer, M. Exner
{"title":"Comparison of ground-based millimeter-wave observations in the arctic winter","authors":"D. Cimini, F. Nasir, E. Westwater, V. Payne, D. Turner, E. Mlawer, M. Exner","doi":"10.1109/MICRAD.2008.4579504","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579504","url":null,"abstract":"During the Radiative Heating in Underexplored Bands Campaign (RHUBC), held in February-March 2007, three millimeter-wave radiometers were operated at the Atmospheric Radiation Measurement (ARM) Programpsilas site in Barrow, Alaska. These radiometers operate several channels located around the strong 183 GHz water vapor line, which is crucial for ground-based water vapor measurements in very dry conditions, typical of the Arctic. Simultaneous radiosonde observations were carried out during conditions with very low water vapor content (les 2 mm). Observations from the three instruments are presented, together with the adjustments made to account for different design characteristics. The overall agreement during RHUBC among the three instruments and between instruments and forward model is discussed quantitatively.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"603 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115107841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Image reconstruction algorithms for 2D aperture synthesis radiometers 二维孔径合成辐射计图像重建算法
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579462
É. Anterrieu, Adriano Camps
{"title":"Image reconstruction algorithms for 2D aperture synthesis radiometers","authors":"É. Anterrieu, Adriano Camps","doi":"10.1109/MICRAD.2008.4579462","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579462","url":null,"abstract":"The SMOS (Soil Moisture and Ocean Salinity) mission is an Earth Explorer Opportunity Mission from the European Space Agency that will be launched in Spring 2009. SMOSpsila single payload is a new type of radiometer called MIRAS (Microwave Imaging Radiometer by Aperture Synthesis) operating at L-band in which brightness temperature images are formed by a Fourier synthesis technique. An updated overview of the current status of the image reconstruction algorithms in 2D Aperture Synthesis Radiometers for Earth Observation, with special emphasis in the SMOS mission is presented.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115241454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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