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

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Wind retrievals under rain for passive satellite microwave radiometers and its application to hurricane tracking 无源卫星微波辐射计雨下风反演及其在飓风跟踪中的应用
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579492
T. Meissner, F. Wentz
{"title":"Wind retrievals under rain for passive satellite microwave radiometers and its application to hurricane tracking","authors":"T. Meissner, F. Wentz","doi":"10.1109/MICRAD.2008.4579492","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579492","url":null,"abstract":"We have developed an algorithm that retrieves wind speed under rain using C-band and X-band channels of passive microwave satellite radiometers. The spectral difference of the brightness temperature signals due to wind or rain allows to find channel combinations that are sufficiently sensitive to wind speed but little or not sensitive to rain. We have trained a statistical algorithm that applies under hurricane conditions and is able to measure wind speeds in hurricanes to an estimated accuracy of about 2 m/s. We have also developed a global algorithm, that is less accurate but can be applied under all conditions. Its estimated accuracy is between 2 and 5 m/s, depending on wind speed and rain rate. We also extend the wind speed region in our model for the wind induced sea surface emissivity from currently 20 m/s to 40 m/s. The data indicate that the signal starts to saturate above 30 m/s. Finally, we make an assessment of the performance of wind direction retrievals from polarimetric radiometers as function of wind speed and rain rate.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"48 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":"130881942","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: 5
The Aquarius/SAC-D mission and status of the Aquarius instrument Aquarius/SAC-D的任务和Aquarius仪器的状态
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579464
D. L. Le Vine, G. Lagerloef, F. Pellerano, F. Colomb
{"title":"The Aquarius/SAC-D mission and status of the Aquarius instrument","authors":"D. L. Le Vine, G. Lagerloef, F. Pellerano, F. Colomb","doi":"10.1109/MICRAD.2008.4579464","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579464","url":null,"abstract":"The Aquarius/SAC-D mission is a partnership between the USA (NASA) and Argentina (CONAE). The observatory consists of Aquarius, an L-band radiometer/radar combination being developed under NASApsilas Earth System Science Pathfinder (ESSP) program to map the surface salinity field of the oceans from space, together with the SAC-D bus and several instruments provided by CONAE and its partners. The Aquarius instrument is currently in I&T at NASA/JPL. The mission is scheduled for launch in May, 2010.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"19 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":"121936923","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: 30
Monitoring of temporal and spatial variability of the East-Antarctic plateau using passive microwave data 利用被动微波数据监测南极东部高原时空变化
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579497
G. Macelloni, M. Brogioni, S. Paloscia, P. Pampaloni, S. Pettinato, E. Santi
{"title":"Monitoring of temporal and spatial variability of the East-Antarctic plateau using passive microwave data","authors":"G. Macelloni, M. Brogioni, S. Paloscia, P. Pampaloni, S. Pettinato, E. Santi","doi":"10.1109/MICRAD.2008.4579497","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579497","url":null,"abstract":"The Antarctic plateau is a part of Antarctica extending for a few hundred kilometers around the South Pole with an average elevation close to 3000 m a.s.l.. This area provides unique opportunities for various scientific disciplines including Glaciology, Atmospheric and Earth Sciences. In this paper temporal and spatial variability of multi-frequency microwave emission from the East Antarctic plateau by using AMSR-E data collected from 2005 to 2007 is analyzed.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"32 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":"126089238","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: 1
Polarimetric interferometric radiometers: Analysis of front-end non-idealities 偏振干涉辐射计:前端非理想性分析
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579466
A. Colliander, P. D. de Maagt, T. Narhi, U. Klein
{"title":"Polarimetric interferometric radiometers: Analysis of front-end non-idealities","authors":"A. Colliander, P. D. de Maagt, T. Narhi, U. Klein","doi":"10.1109/MICRAD.2008.4579466","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579466","url":null,"abstract":"Polarimetric interferometric radiometers are analyzed, including the polarization leakage and other non-idealities in the front-end, which can be measured and modelled with S-parameters. The main purpose of this study is to develop a model for accurate description of the effects of the polarization leakage in polarized interferometric measurements from geostationary orbit.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"19 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":"127464475","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
An anisotropic ocean surface emissivity model based on WindSat polarimetric brightness observations 基于WindSat偏振亮度观测的各向异性海洋表面发射率模型
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579491
D. Smith, B. Weber, A. Gasiewski
{"title":"An anisotropic ocean surface emissivity model based on WindSat polarimetric brightness observations","authors":"D. Smith, B. Weber, A. Gasiewski","doi":"10.1109/MICRAD.2008.4579491","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579491","url":null,"abstract":"A full-Stokes vector model for the microwave emissivity of an anisotropic wind driven ocean surface based on measured satellite data and using a two-scale model for surface emission is being developed for the purpose of assimilation of satellite microwave radiances. The model is based on the Ohio State University two-scale model and tuned to WindSat full-Stokes emissivity data as analyzed by Meissner and Wentz. Several physical inconsistencies were corrected in the model. The tuned model results over a range of wind speeds from 0-20 m/sec show good agreement in the 0th, 1st, and 2nd azimuthal brightness temperature harmonics. A bias model for the tuned model was developed to account for residual discrepancies.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"69 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":"130390886","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: 1
The millimeter wave response to volume density and grain size of dry homogeneous snow. An algorithm for retrieval of snow depth from radiometer data at the frequencies 22 and 37 GHz 干均质雪的毫米波对体积密度和粒径的响应。从22 GHz和37 GHz频率的辐射计数据中检索雪深的算法
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579510
V. A. Golunov
{"title":"The millimeter wave response to volume density and grain size of dry homogeneous snow. An algorithm for retrieval of snow depth from radiometer data at the frequencies 22 and 37 GHz","authors":"V. A. Golunov","doi":"10.1109/MICRAD.2008.4579510","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579510","url":null,"abstract":"Results of experimental investigation of dry homogeneous snow cover and man-made like-snow media emissivity and scattering properties in the microwave and millimeter wavelength ranges are presented. The effects of grain size, volume density and layer depth on the scattering properties were examined. Approximate expressions for scattering layer reflectivity and transmissivity based on the semi-empirical scattering model approach were obtained. Spectral relationship between basic parameters of emission from grained snow at the frequencies 22 and 37.5 GHz has been restored due to analysis of experimental data sets obtained for both dry snow and man-made like-snow media. As a result the algorithm for retrieval of snow depth has been developed using radiometry frequency channels at the 22 and 37.5 GHz. This algorithm permits to retrieve snow depth regardless of crystal size. It was scheduled to use this algorithm in the space program LtPrirodaGt.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"35 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133008443","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
A novel microwave radiometer for assessment of atmospheric propagation conditions for 10 and 90 GHz frequency bands 一种用于评估10 GHz和90 GHz频段大气传播条件的新型微波辐射计
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579502
D. Norenberg, S. Crewell, U. Lohnert, T. Rose, A. Martellucci
{"title":"A novel microwave radiometer for assessment of atmospheric propagation conditions for 10 and 90 GHz frequency bands","authors":"D. Norenberg, S. Crewell, U. Lohnert, T. Rose, A. Martellucci","doi":"10.1109/MICRAD.2008.4579502","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579502","url":null,"abstract":"In order to quantify atmospheric perturbations on satellite signals a new ground based ultra stable microwave radiometer is developed. In addition to several K- and V-band channels two further Ku- and W-band channels are implemented. This frequency combination provides sensitivity towards atmospheric water vapour and oxygen, as well as to rain and cloud droplets. To perform high stable measurements, the radiometer is equipped by a continuous calibration method using a Dicke switch and a noise diode. This yields to radiometer stability for integration times up to 2000 seconds.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"14 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":"124009599","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
The retrievals of effective grain size and snow water equivalent from variationally-retrieved microwave surface emissivities 微波表面发射率反演有效粒度和雪水当量
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579511
C. Kongoli, S. Boukabara, F. Weng
{"title":"The retrievals of effective grain size and snow water equivalent from variationally-retrieved microwave surface emissivities","authors":"C. Kongoli, S. Boukabara, F. Weng","doi":"10.1109/MICRAD.2008.4579511","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579511","url":null,"abstract":"This study introduces a new technique for the estimation of the snow effective grain size and water equivalent based on the microwave surface emissivity spectra retrieved from a one-dimensional variational retrieval system and a microwave snow emissivity model. The microwave emissivity model is derived analytically from the dense media radiative transfer theory. The model snow physical parameters include the effective grain size, volume fraction and depth. The two-steps algorithm is based on variationally retrieving the emissivity spectrum from microwave remote sensing observations, followed by the estimation of the closest emissivity spectrum from a catalog to determine the snow water equivalent and the effective grain size. This catalog was computed off-line using the microwave emissivity model for realistic ranges of the effective snow parameters. Qualitative inspection of variationally retrieved emissivities and the snow parameters show large-scale consistency. The performance of this physically-based retrieval technique is quantitatively assessed against snow water equivalent measurements and against an empirical brightness temperature-based algorithm.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"394 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":"115915342","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: 1
Soil moisture effect on microwave emission of forest canopies 土壤水分对森林冠层微波辐射的影响
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579461
S. Paloscia, P. Pampaloni, E. Santi, S. Pettinato, A. Della Vecchia, P. Ferrazzoli, L. Guerriero
{"title":"Soil moisture effect on microwave emission of forest canopies","authors":"S. Paloscia, P. Pampaloni, E. Santi, S. Pettinato, A. Della Vecchia, P. Ferrazzoli, L. Guerriero","doi":"10.1109/MICRAD.2008.4579461","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579461","url":null,"abstract":"In this paper, experimental results obtained on two forest plots in Tuscany (Italy) by using the IROE/IFAC multi-frequency dual-polarized microwave radiometer are reported. The sensitivity of L-band microwave emission to both forest biomass and soil moisture content under canopies is investigated. A radiative transfer model, which considers vegetation as an ensemble of disks and cylinders over a soil surface, has been used to interpret the obtained results. A good agreement between experimental data and model simulations has been obtained. A further analysis has been carried out by applying the model for predicting the soil moisture under natural forests with moderate biomass.","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":"128901722","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: 7
Rain retrieval using the 183 GHz absorption lines 利用183 GHz吸收线进行雨水检索
2008 Microwave Radiometry and Remote Sensing of the Environment Pub Date : 2008-03-11 DOI: 10.1109/MICRAD.2008.4579505
S. Laviola, V. Levizzani
{"title":"Rain retrieval using the 183 GHz absorption lines","authors":"S. Laviola, V. Levizzani","doi":"10.1109/MICRAD.2008.4579505","DOIUrl":"https://doi.org/10.1109/MICRAD.2008.4579505","url":null,"abstract":"High spatial resolution AMSU opaque channels are used to retrieve rain rates and classify precipitation types. The retrieval scheme (183-WSL) consists of two fast algorithms, one for land and the other for sea surface, that use the water strong lines at 183.31 GHz to infer rain rate amounts based on a series of thresholds calculated to remove the condensed water vapor effect and discriminate between convective and stratiform pixels. The reported results show the sensitivity of the technique to detect deep convective clouds and to measure light-rain stratiform systems. This latter fact recommends its application particularly over mid-latitude basins where persistent light rains cause intense run-off episodes. Other studies are planned to apply the method at high latitudes where the atmospheric humidity is mainly located within the surface layers and appropriate correction coefficients need to be found.","PeriodicalId":193521,"journal":{"name":"2008 Microwave Radiometry and Remote Sensing of the Environment","volume":"45 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":"116347952","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: 12
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