2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)最新文献

{"title":"Verification of Cloud Dynamics and Radiation Database (CDRD) passive microwave precipitation retrieval algorithm using TRMM satellite radar and radiometer measurements over Southern Mediterranean Basin","authors":"D. Casella, S. Dietrich, M. Formenton, A. Mugnai, G. Panegrossi, P. Sanò, E. Smith, G. Tripoli","doi":"10.1109/MICRORAD.2012.6185243","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185243","url":null,"abstract":"A verification study is conducted for the Cloud Dynamics and Radiation Database (CDRD) rainfall algorithm over the southern Mediterranean Basin (25-36° N / 25° W-45° E), based on TRMM Microwave Imager (TMI) passive microwave (PMW) brightness temperature (TB) measurements. The CDRD's required synthetic database is generated from a high resolution, nonhydrostatic cloud resolving model equipped with a precision RTE model. This dual modeling system is used to simulate numerous and precipitating storms over Europe and across the Mediterranean Basin as the database's foundation. Extracted from the simulations for the database are the a priori knowledge variables involving many thousands of synthetic precipitating microphysical-meteorological profiles and their concomitant synthetic multi-frequency PMW TBs. This information provides the probability framework for the CDRD algorithm's Bayesian inversion process and thus the means to relate measured satellite TBs to the most probable rainfall solutions. As the newest algorithm feature, the CDRD scheme makes use of meteorological parameters (tags) of observed precipitation systems, obtained from global NWP model synthesized initialization data, for both precipitation regime recognition and Bayesian retrieval constraints. These two steps effectively reduce non-uniqueness problems in obtaining retrieval solutions. Comparison of TMI-based CDRD retrievals to coincident TRMM Precipitation Radar (PR) retrievals, used as ground truth, provides the means to assess the algorithm's performance and the twofold use of meteorological tag information for control and constraint. PR-retrieved cloud property parameters (e.g., freezing level) are also compared to NWP model tags to further verify algorithm design performance. The verification procedure utilizes a full year (2010) of TMI and PR measurements, indicating CDRD over-ocean and over-land results are within 0.10 and 0.17 mm hr-1 of the PR means, with accompanying 1.24 and 2.94 mm hr-1 rms errors. The CDRD algorithm is also compared to the TRMM TMI facility algorithm (2al2-v7), exhibiting slight improvement over water (in correlation coefficient) and significantly improvement over land. Error statistics indicate CDRD vis-a-vis 2al2 over-land improvements of 78% and 14% in regards to mean error and rms error, respectively.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"492 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115884193","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}

{"title":"Global Precipitation Measurement (GPM) Microwave Imager (GMI) pre-flight calibration performance","authors":"David Draper, David Newell","doi":"10.1109/MICRORAD.2012.6185261","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185261","url":null,"abstract":"The GMI calibration design incorporates unique features to limit calibration errors that have been observed with previous radiometers. The design geometrically blocks solar intrusion into the hot load, encloses the hot load in a tray with known temperature, utilizes a dual calibration system using hot load/ cold-sky views plus noise diodes, and has a proven main reflector coating technology to ensure high reflectance. Calibration performance is based on ground calibration data taken in thermal vacuum tests together with component tests and analyses. The main measurements taken to demonstrate calibration performance include thermal vacuum radiometric measurements using an external calibration system, beam pattern measurements including modeled backlobe estimates for the main beam and cold sky beams, validated thermal model predictions of hot load thermal gradient performance, and reflector coating conductance. The calibration design meets the GMI calibration uncertainty requirements.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131039504","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}

{"title":"Comparison of WindSat and ASCAT wind fields on the mediterranean sea","authors":"F. De Biasio, S. Zecchetto","doi":"10.1109/MICRORAD.2012.6185230","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185230","url":null,"abstract":"The ocean wind vector (OWV) fields retrieved on the Mediterranean and Black seas by satellite-borne microwave active and passive instruments (the ASCAT and QuikSCAT scatterometers and the WindSat polarimetric radiometers) are statistically compared each other. The periods of the comparison vary: from 2003 to 2009 for QuikSCAT and WindSat, and 2009 to 2010 for ASCAT and WindSat. Global and local statistics of the OWV comparisons are performed and shown. Trends are evidenced for some parameters, and a general agreement in the statistical description of the OWV is found. The reason for the study was the need to increase the number of available observations in the Mediterranean Sea to better describe meso-scale β (20-200 km, [1]) atmospheric processes and the characteristics of the interaction of the wind flow with the orography.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115584317","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}

{"title":"Main design parameters and imaging/radiometric performances of the METOP Second Generation conically scanning radiometers","authors":"S. Varchetta, S. Pompili, B. Buralli, G. Alberti, G. Pica, M. Santovito, S. D'addio, V. Kangas","doi":"10.1109/MICRORAD.2012.6185266","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185266","url":null,"abstract":"In the context of MetOp Second Generation (MetOp-SG) phase A/B1 study, Thales Alenia Space is responsible of Microwave Imager (MWI) and Ice Cloud Imager (ICI) instruments. MWI and ICI are conically scanning microwave radiometers, together covering frequency range from 18.7 GHz up to 664 GHz. The on-going study covers all elements of the space segment and instrument architecture and deals with the analysis of the space system requirements and the definition of candidate implementation concepts in order to satisfy the user's needs and requirements. MWI and ICI will fly on a spacecraft in a near circular sun-synchronous, near polar orbit. In order to acquire measurements on a wide swath the instrument will rotates continuously about an axis parallel to the local spacecraft vertical with an active portion of the scan of ~±65 deg centred on the foreword direction of the spacecraft. The Earth scene view is a nearly constant incidence angle of about 53 deg. Challenging Imaging and radiometric requirements are applicable to MWI and ICI instruments and a trade-off has been performed in order to identify and size main system parameters. In the paper a description of the trade-off that was performed will be presented and the results achieved will be described.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114499558","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}

{"title":"Investigation of coherence in L-band thermal emission from com canopies","authors":"Qianyi Zhao, C. Utku, R. Lang","doi":"10.1109/MICRORAD.2012.6185253","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185253","url":null,"abstract":"This paper presents the simulation results of thermal emission from a corn canopy. The corn stalks are modeled using the quasi-periodic approach. The wave attenuation through the corn leaves modeled as elliptical disks is taken into account in the simulations. The computed brightness temperature that depends on the azimuthal look angle shows the attenuation effects due to the leaves in addition to the coherence effects due to the periodic structure of the stalks.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125094244","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}

{"title":"A comprehensive analysis of AMSRE C- and X-bands Radio Frequency Interferences","authors":"T. Lacava, M. Faruolo, N. Pergola, I. Coviello, V. Tramutoli","doi":"10.1109/MICRORAD.2012.6185256","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185256","url":null,"abstract":"The Advanced Microwave Scanning Radiometer (AMSRE) on Earth Observing System (EOS) Aqua was able to acquire global microwave data for nearly nine years, from June 2002 to October 2011. During its operational phase, the main problem of data quality was due to the Radio Frequency Interference (RFI), which contaminated data acquired at C- and, with less relevance, X-bands. In this work, the multi-temporal Robust Satellite Techniques (RST) approach has been applied to automatically identify areas systematically affected by RFI, contaminating C- and X-band AMSRE radiances. With the scope of producing reliable RFI exclusion maps at global scale, data acquired globally from June 2002 to June 2011 were analyzed.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124130881","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}

{"title":"Improved measurements of seawater dielectric constant at L-band","authors":"Yiwen Zhou, R. Lang, C. Drego, C. Utku, D. L. Le Vine","doi":"10.1109/MICRORAD.2012.6185228","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185228","url":null,"abstract":"This paper describes new measurements made in 2011-2012 of the dielectric constant of seawater at 1.413 GHz using a resonant cavity technique. These measurements are more accurate than previous measurements made in 2008. The paper discusses the improved experimental methods used for the 2011-12 measurements. The new measurement data is also be compared with Klein-Swift (KS) model function and Meissner-Wentz (MW) model function.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130455138","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}

{"title":"Study of atmospheric boundary layer thermodynamics during total solar eclipse on the basis of microwave radiometers data","authors":"E. Kadygrov, E. Miller, A. Troitsky","doi":"10.1109/MICRORAD.2012.6185246","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185246","url":null,"abstract":"Results of temperature profile measurements at altitude range 0+600 m and total water content measurements during total (Kislovodsk, 2006; Novosibirsk, 2008) and partial (Moscow, 2011) solar eclipse by the using of microwave radiometer data presented in the report. Terrestrial consequences of solar eclipse (especially the total ones) are noticeable and important. Eclipses support unique, specific conditions which give the opportunity to numerous varied meteorological researches. The most important indicator of thermodynamical processes during solar eclipse is air temperature in the different altitudes in the atmospheric boundary layer (ABL). The ABL air temperature depends in general on the flux of solar radiation and on some features of the ground (albedo, absorptivity and emissivity) and the features of the air (mainly humidity).","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"246 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133879063","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}

{"title":"Monitoring soil moisture in the Pampas plains of Argentina using spaceborne radiometers and SAR: Evaluation of products","authors":"H. Karszenbaum, F. Grings, F. Carballo, M. Salvia, R. Rahmoune, M. Piscitelli","doi":"10.1109/MICRORAD.2012.6185234","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185234","url":null,"abstract":"The Argentine pampas is a wide plain with more than 40 million ha of land suitable for cattle rearing and cropping. Several watersheds with different hydrological characteristics and agricultural practices cover this huge region. Last decades have shown an increase in extreme conditions (droughts and floods) and the need for improving prediction models. This work is part of an ongoing project related to mapping and monitoring flooding events in La Plata Basin using spaceborne instruments, including SACD/Aquarius. Measurements of AMSR-E, SMOS, and ENVISAT/ASAR over several locations of the Pampas were analyzed. Precipitations, NDVI, PR (polarization ratios for L, C and X band), as well as both SMOS and AMSR-E soil moisture (SM) products trends were evaluated. The sensitivity and the correlation of the different trends were studied. When comparing between frequencies, the measured PRs present trends which agree with theoretical results. SMOS PRs present both higher sensitivity and dynamic range. SMOS optical depth is also shown. Finally Envisat ASAR images collected during the period analyzed are discussed.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133805343","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}

{"title":"Lunar sub-surface remote sensing by spacebome microwave Interferometric Radiometers: Analysis and preliminary results","authors":"S. Pompili, P. Tognolatti, A. Di Carlofelice, S. Marzano, P. Romano, C. Sciannella, S. Varchetta, M. Montopoli","doi":"10.1109/MICRORAD.2012.6185270","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185270","url":null,"abstract":"In this paper we propose a mission concept, called Lunar Interferometric Radiometer by Aperture Synthesis (LIRAS), which addresses the high-resolution mapping and vertical sounding of the Moon sub-surface for planetary analysis and studies. This is done by taking advantage of the antenna aperture synthesis technique applied to a multi-frequency microwave passive payload. The final objectives of this study are to demonstrate the technical feasibility of the LIRAS project and then, with the aid of microwave simulations of Moon soil behavior and the synthetic antenna aperture, to present a preliminary design of the LIRAS spacecraft system.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132059721","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}