2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)最新文献_第4页

Passive microwave remote sensing of Plinian eruption due to the Grímsvötn Icelandic volcano 冰岛火山Grímsvötn普林尼火山喷发的被动微波遥感

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185247

F. Marzano, M. Lamantea, M. Montopoli, D. Cimini, M. Herzog, H. Graf

引用次数: 5

Nanosatellites for earth environmental monitoring: The MicroMAS project 用于地球环境监测的纳米卫星:MicroMAS项目

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185263

W. Blackwell, G. Allen, C. Galbraith, T. Hancock, R. Leslie, I. Osaretin, L. Retherford, M. Scarito, C. Semisch, M. Shields, M. Silver, D. Toher, K. Wight, D. Miller, K. Cahoy, N. Erickson

{"title":"Nanosatellites for earth environmental monitoring: The MicroMAS project","authors":"W. Blackwell, G. Allen, C. Galbraith, T. Hancock, R. Leslie, I. Osaretin, L. Retherford, M. Scarito, C. Semisch, M. Shields, M. Silver, D. Toher, K. Wight, D. Miller, K. Cahoy, N. Erickson","doi":"10.1109/MICRORAD.2012.6185263","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185263","url":null,"abstract":"The Micro-sized Microwave Atmospheric Satellite (MicroMAS) is a 3D cubesat (30×10×10 cm, 4kg) hosting a passive microwave spectrometer operating near the 118.75-GHz oxygen absorption line. The focus of the first MicroMAS mission (hereafter, MicroMAS-1) is to observe convective thunderstorms, tropical cyclones, and hurricanes from a near-equatorial orbit at approximately 500-km altitude. A MicroMAS flight unit is currently being developed in anticipation of a 2014 launch. A parabolic reflector is mechanically rotated as the spacecraft orbits the earth, thus directing a cross-track scanned beam with FWHM beamwidth of 2.2-degrees, yielding an approximately 25-km diameter footprint from a nominal altitude of 500 km. Radiometric calibration is carried out using observations of cold space, the earth's limb, and an internal noise diode that is weakly coupled through the RF front-end electronics. A key technology feature is the development of an ultra-compact intermediate frequency processor module for channelization, detection, and A-to-D conversion. The antenna system and RF front-end electronics are highly integrated and miniaturized. A MicroMAS-2 mission is currently being planned using a multi-band spectrometer operating near 118 and 183 GHz in a sun-synchronous orbit of approximately 800-km altitude. A HyMAS-1 (Hyperspectral Microwave Atmospheric Satellite) mission with approximately 50 channels near 118 and 183 GHz is also being planned. In this paper, the mission concept of operations will be discussed, the radiometer payload will be described, and the spacecraft subsystems (avionics, power, communications, attitude determination and control, and mechanical structures) will be summarized.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"30 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":"126927534","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: 38

Aquarius: The instrument and initial results 水瓶座:仪器和初步结果

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185226

D. L. Le Vine, G. Lagerloef, C. Ruf, F. Wentz, S. Yueh, J. Piepmeier, E. Lindstrom, E. Dinnat

引用次数: 6

Challenges in application of Active Cold Loads for microwave radiometer calibration 主动冷负荷在微波辐射计标定中的应用挑战

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185258

S. Sobjaerg, J. Balling, N. Skou

引用次数: 1

Retrieval of tropospheric water vapour profiles by using spectra from a microwave spectro-radiometer at 22 GHz 利用22 GHz微波光谱辐射计的光谱反演对流层水汽剖面

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185249

R. Bleisch, N. Kampfer

{"title":"Retrieval of tropospheric water vapour profiles by using spectra from a microwave spectro-radiometer at 22 GHz","authors":"R. Bleisch, N. Kampfer","doi":"10.1109/MICRORAD.2012.6185249","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185249","url":null,"abstract":"We present an approach to retrieve the tropospheric water vapour content from spectra observed at 22 GHz by the groundbased microwave radiometer MIAWARA (Middle Atmospheric Water Vapour Radiometer), located in the south of Bern (CH) and operated by the Institute of Applied Physics in the frame of NDACC. Our retrieval approach uses the entire bandwidth of 1 GHz of the spectrometer to additionally retrieve tropospheric water vapour profiles. Thereby total power spectra from tipping curve calibration (usually used to determine tropospherical opacity) are used. In addition to a standard a priori profile, we try to improve the performance of our retrieval approach by using external informations as additional retrieval constraints. One attempt is to use informations about cloud coverage delivered by a Ceilometer (installed close to the instrument) and an infrared sensor, which is attached to the instrument with the same line-of-sight. Thereby the cloud-base height together with an assumed relative humidity of 100% deliver a \"fixed-point\" with known profile value as additional a-priori information.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"278 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":"134138424","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

RFI detection in SMOS data using 3rd and 4th Stokes parameters 使用第3和第4 Stokes参数的SMOS数据中的RFI检测

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185254

S. Kristensen, J. Balling, N. Skou, S. Sobjaerg

引用次数: 6

Comparison of Aquarius measurements and radiative transfer models at L-band Aquarius测量值与l波段辐射传输模型的比较

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185231

E. Dinnat, D. L. Le Vine, S. Abraham, P. de Matthaeis, C. Utku

引用次数: 6

SMOS L3 salinity performances at decreasing sea surface temperature 降低海表温度时SMOS L3的盐度表现

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185232

R. Sabia, D. Fernández-Prieto, M. Portabella, J. Gourrion, J. Font, M. Talone, Adriano Camps

引用次数: 1

Validation of TMI derived total precipitable water vapour with operational soundings 用实际探测验证TMI推导的总可降水量

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185248

G. Liberti, C. Transerici, M. Buzzicotti

{"title":"Validation of TMI derived total precipitable water vapour with operational soundings","authors":"G. Liberti, C. Transerici, M. Buzzicotti","doi":"10.1109/MICRORAD.2012.6185248","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185248","url":null,"abstract":"This study presents a validation exercise of the total precipitable water vapour (TPWV) obtained from microwave passive radiometry over oceans from the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI). This study reports the results of the comparison of the TMI derived TPWV against the one obtained from radiosoundings from operational meteorological sites. A TMI-radiosounding comparison dataset has been created using semi-objectively defined matching criteria. Screening of low quality observation from both dataset is performed to include in the comparison low quality observations. Applying the match-up criteria for the period Dec.1997-Jan.2012 gives a set of 141679 comparison cases from 232 sites. The overall resulting BIAS is 0.90 mm with a RMS of 4.84 mm. Detailed analyses are performed to discuss and to interpret the comparison results in terms of error derived from: the criteria adopted to match the observations (space and time), instrumental errors from both TMI and radiosonde (solar illumination, radiosonde type), algorithms error (by correlating the comparison results against the value of the other geophysical parameters derived from the TMI, vertical integration scheme for the radiosounding).","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"14 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":"133315268","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

First validation of retrieved rain rates and snow cover mask of the 183-WSL retrieval method 首次验证了183-WSL反演方法的反演雨率和积雪掩码

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Pub Date : 2012-03-05 DOI: 10.1109/MICRORAD.2012.6185242

S. Laviola, V. Levizzani, E. Cattani, C. Kidd

{"title":"First validation of retrieved rain rates and snow cover mask of the 183-WSL retrieval method","authors":"S. Laviola, V. Levizzani, E. Cattani, C. Kidd","doi":"10.1109/MICRORAD.2012.6185242","DOIUrl":"https://doi.org/10.1109/MICRORAD.2012.6185242","url":null,"abstract":"Improvements of the 183-WSL retrieval method allow to better describe the precipitating clouds as to rain distribution, type and amount. The 183-WSL method is physically based on the water vapor absorption band at 18331 GHz and retrieves the rain rates upon discriminating the convective/stratiform characteristics of the observed precipitation. The current version of the retrieval scheme was upgraded with a dedicated module for the identification of the snow cover pixels, which are often responsible for false alarms because of the strong scattering from the frozen surfaces. The 183-WSL snow cover module, currently in the testing stage, produces a snow cover mask per each satellite overpass, distinguishing between regions of wet and dry snow. The validation of rain rates is carried out by using two years of data of the European Radar Network NIMROD while the snow cover product is compared with 6 months of maps from the Interactive Multisensor Snow and Ice Mapping System (IMS) operational product over the Baltic Regions. Furthermore, the 183-WSL retrievals were compared with other satellite retrieval methods using the NORDRAD radar network measurements as ground truth over 2 months. The analysis reveals that the 183-WSL new computational scheme shows high match ups with radar data with high values of the statistical indices. Although the new version of the 183-WSL performs better than the previous with the integration of the snow cover mask module into the main retrieval scheme, it tends to overestimate the retrieved rain rates especially those with intensities lower than 1 mm h-1. This threshold is crucial especially during the winter season.","PeriodicalId":122743,"journal":{"name":"2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"37 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":"133970202","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