Pub Date : 2018-03-27DOI: 10.1109/MICRORAD.2018.8430699
H. Park, Adriano Camps, J. Querol, K. Szczepankiewicz, C. de Negueruela, W. Oryszczak, L. Soto, R. Kedzierawski, F. E. Aleman Roda
This work describes a software tool developed for ESA within the project BIBLOS-2 (BuIlding BLOcks for earth observation mission performance simulator) to model typical conical scanning microwave radiometers in a generic Earth Observation mission. It consists of functional modules: Geometry, Scene Generator, Instrument, and Level 1 data generation modules. This structure follows the architecture for generic Earth Observation mission simulator study, ARCHEO-E2E (ARCHitecture of Earth Observation). The improvement in the BIBLOS-2 Passive Microwave is developing the Radio Frequency Interferences (RFI) generation and mitigation functionality. The developed simulation modules will be provided soon via the BIBLOS web page (https://gmv-biblos.gmv.com/). In this paper, the functions of the BIBLOS-2 passive microwave are described module by module, including the RFI generation/mitigation examples.
{"title":"Generic Simulator for Conical Scanning Microwave Radiometers","authors":"H. Park, Adriano Camps, J. Querol, K. Szczepankiewicz, C. de Negueruela, W. Oryszczak, L. Soto, R. Kedzierawski, F. E. Aleman Roda","doi":"10.1109/MICRORAD.2018.8430699","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430699","url":null,"abstract":"This work describes a software tool developed for ESA within the project BIBLOS-2 (BuIlding BLOcks for earth observation mission performance simulator) to model typical conical scanning microwave radiometers in a generic Earth Observation mission. It consists of functional modules: Geometry, Scene Generator, Instrument, and Level 1 data generation modules. This structure follows the architecture for generic Earth Observation mission simulator study, ARCHEO-E2E (ARCHitecture of Earth Observation). The improvement in the BIBLOS-2 Passive Microwave is developing the Radio Frequency Interferences (RFI) generation and mitigation functionality. The developed simulation modules will be provided soon via the BIBLOS web page (https://gmv-biblos.gmv.com/). In this paper, the functions of the BIBLOS-2 passive microwave are described module by module, including the RFI generation/mitigation examples.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"834 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116149504","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}
Pub Date : 2018-03-27DOI: 10.1109/MICRORAD.2018.8430728
A. Al-Sabbagh, Ruaa Alsabah, J. Zec
NASA RapidScat is the first satellite scatterometer that flown in non-Sun-synchronous orbit. Its unique orbit enabled collocated measurements with multiple satellite remote-sensing instruments that mostly fly in Sun-synchronous orbits. RapidScat's primary mission was retrieval of global ocean wind vectors from normalized radar backscatter measurements. The instrument operated onboard the International Space Station between September 2014 and August 2016 covering sub-satellite latitude range between ±51.6°. To serve as a cross-calibration reference with other instruments, RapidScat must be carefully calibrated. This paper describes the process that combines RapidScat's active/passive mode, simultaneously measuring both the radar surface backscatter (active mode) and microwave emission from the system noise temperature (passive mode). The radiometric calibration of RapidScat that enables the surface brightness temperature measurement is presented. Seasonal measurement biases have been evaluated using the Radiative Transfer Model (RTM). Systematic brightness temperature biases for both polarizations have been calculated as a function of geometry, atmospheric model, and ocean brightness temperature models. These deviations were averaged over 1084 RapidScat revolutions. Trends from observations during a 20-month period between January 2015 and August 2016 have been described. Results obtained indicate that most of the measured data in 2015 show an overall average agreement.
{"title":"Calibration of RapidScat Brightness Temperature","authors":"A. Al-Sabbagh, Ruaa Alsabah, J. Zec","doi":"10.1109/MICRORAD.2018.8430728","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430728","url":null,"abstract":"NASA RapidScat is the first satellite scatterometer that flown in non-Sun-synchronous orbit. Its unique orbit enabled collocated measurements with multiple satellite remote-sensing instruments that mostly fly in Sun-synchronous orbits. RapidScat's primary mission was retrieval of global ocean wind vectors from normalized radar backscatter measurements. The instrument operated onboard the International Space Station between September 2014 and August 2016 covering sub-satellite latitude range between ±51.6°. To serve as a cross-calibration reference with other instruments, RapidScat must be carefully calibrated. This paper describes the process that combines RapidScat's active/passive mode, simultaneously measuring both the radar surface backscatter (active mode) and microwave emission from the system noise temperature (passive mode). The radiometric calibration of RapidScat that enables the surface brightness temperature measurement is presented. Seasonal measurement biases have been evaluated using the Radiative Transfer Model (RTM). Systematic brightness temperature biases for both polarizations have been calculated as a function of geometry, atmospheric model, and ocean brightness temperature models. These deviations were averaged over 1084 RapidScat revolutions. Trends from observations during a 20-month period between January 2015 and August 2016 have been described. Results obtained indicate that most of the measured data in 2015 show an overall average agreement.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115027016","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}
Pub Date : 2018-03-27DOI: 10.1109/MICRORAD.2018.8430723
Hyuk Park, Adriano Camps, M. Vall-llossera, V. González-Gambau
Radio Frequency Interference (RFI) is one of the problems causing the performance degradation in passive microwave radiometry. Especially, Synthetic Aperture Interferometric Radiometer (SAIR) is quite vulnerable to strong RFI. The Soil Moisture Ocean Salinity (SMOS) brightness temperature images show serious contamination by the RFI. The RFI affection in SAIR images should be mitigated or filtered out to retrieve the geophysical parameters. This work presents a method to RFI mitigation/filtering for SAIRs. Different from the existing method processing the brightness temperature image directly, RFI filtering of the subspace of covariance matrix is introduced, and the results are shown. The proposed method shows decent results for strong RFI with efficiency compared to the existing methods.
{"title":"Strong RFI Impact Mitigation in the Synthetic Aperture Interferometric Radiometer","authors":"Hyuk Park, Adriano Camps, M. Vall-llossera, V. González-Gambau","doi":"10.1109/MICRORAD.2018.8430723","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430723","url":null,"abstract":"Radio Frequency Interference (RFI) is one of the problems causing the performance degradation in passive microwave radiometry. Especially, Synthetic Aperture Interferometric Radiometer (SAIR) is quite vulnerable to strong RFI. The Soil Moisture Ocean Salinity (SMOS) brightness temperature images show serious contamination by the RFI. The RFI affection in SAIR images should be mitigated or filtered out to retrieve the geophysical parameters. This work presents a method to RFI mitigation/filtering for SAIRs. Different from the existing method processing the brightness temperature image directly, RFI filtering of the subspace of covariance matrix is introduced, and the results are shown. The proposed method shows decent results for strong RFI with efficiency compared to the existing methods.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131433012","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}
Pub Date : 2018-03-27DOI: 10.1109/MICRORAD.2018.8430719
Shuyan Liu, C. Grassotti, Q. Liu
The NOAA Microwave Integrated Retrieval System (MiRS) has been implemented operationally at the U.S. National Oceanic and Atmospheric Administration (NOAA) since 2007 and has been generating environmental data records (i.e. satellite products) for many satellites that contain microwave sensors. This paper focuses on cloud liquid water path (CLWP) retrieved from Advanced Technology Microwave Sounder (ATMS) onboard Suomi National Polar-orbiting Partnership (SNPP) satellite. The CLWP product is assessed by both ground based observations and a satellite based reference dataset. The ground in-situ observations are from the Atmospheric Radiation Measurement (ARM) at Eastern North Atlantic (ENA) site at Graciosa Island, Azores, Portugal. Satellite reference data are from Global Precipitation Measurement (GPM) Goddard Profiling Algorithm (GPROF) corresponding CLWP product. Results showed that MiRS retrieved CLWP is in good agreement with the reference data sets. There is some indication of seasonal and latitudinal dependence in performance, some of which may be related to uncertainties in the reference data themselves.
{"title":"NOAA Microwave Integrated Retrieval System (MiRS) Cloud Liquid Water Retrieval and Assessment","authors":"Shuyan Liu, C. Grassotti, Q. Liu","doi":"10.1109/MICRORAD.2018.8430719","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430719","url":null,"abstract":"The NOAA Microwave Integrated Retrieval System (MiRS) has been implemented operationally at the U.S. National Oceanic and Atmospheric Administration (NOAA) since 2007 and has been generating environmental data records (i.e. satellite products) for many satellites that contain microwave sensors. This paper focuses on cloud liquid water path (CLWP) retrieved from Advanced Technology Microwave Sounder (ATMS) onboard Suomi National Polar-orbiting Partnership (SNPP) satellite. The CLWP product is assessed by both ground based observations and a satellite based reference dataset. The ground in-situ observations are from the Atmospheric Radiation Measurement (ARM) at Eastern North Atlantic (ENA) site at Graciosa Island, Azores, Portugal. Satellite reference data are from Global Precipitation Measurement (GPM) Goddard Profiling Algorithm (GPROF) corresponding CLWP product. Results showed that MiRS retrieved CLWP is in good agreement with the reference data sets. There is some indication of seasonal and latitudinal dependence in performance, some of which may be related to uncertainties in the reference data themselves.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125271602","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}
Pub Date : 2018-03-27DOI: 10.1109/MICRORAD.2018.8430714
Steen Savstrup Kristensen, Sten Schmidl Sobitera, N. Skou, J. Lahtinen, J. Uusitalo, D'Addio Salvatore
Ku-band is used for measuring ocean wind velocities from meteorological satellites. Ku-band is also used for broadcasting DirectTV signals from satellites over the United States. The reflection of these signals are seen as RFI by the meteorological satellites and algorithms for detecting and blanking natural signals affected by RFI have to be developed. This paper presents a new algorithm targeted for detecting these DirectTV signals. The algorithm is implemented in firmware and its performance measured using a bread-board real time RFI processor developed for spaceborne radiometers and the DTU Space Ku-band radiometer POLRAD. It is shown that the new algorithm has a better performance than the traditional cross frequency algorithm for wideband RFI. It is also shown that the traditional cross frequency algorithm has a better performance than the new with respect to narrowband RFI. The new algorithm can thus augment but not substitute the tradition cross frequency algorithm.
{"title":"Measured Performance of Improved Cross Frequency Algorithm for Detection of RFI from DTV","authors":"Steen Savstrup Kristensen, Sten Schmidl Sobitera, N. Skou, J. Lahtinen, J. Uusitalo, D'Addio Salvatore","doi":"10.1109/MICRORAD.2018.8430714","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430714","url":null,"abstract":"Ku-band is used for measuring ocean wind velocities from meteorological satellites. Ku-band is also used for broadcasting DirectTV signals from satellites over the United States. The reflection of these signals are seen as RFI by the meteorological satellites and algorithms for detecting and blanking natural signals affected by RFI have to be developed. This paper presents a new algorithm targeted for detecting these DirectTV signals. The algorithm is implemented in firmware and its performance measured using a bread-board real time RFI processor developed for spaceborne radiometers and the DTU Space Ku-band radiometer POLRAD. It is shown that the new algorithm has a better performance than the traditional cross frequency algorithm for wideband RFI. It is also shown that the traditional cross frequency algorithm has a better performance than the new with respect to narrowband RFI. The new algorithm can thus augment but not substitute the tradition cross frequency algorithm.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123740777","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}
Pub Date : 2018-03-27DOI: 10.1109/MICRORAD.2018.8430722
C. Bredin, J. Orlhac, T. Decoopman, Pierre-Olivier Antoine, A. Kallel, C. Malassingne, F. Bayle, C. Tabart, A. Catalani, D'Addio Salvatore, T. Lupi
This paper describes the MWI radiometer being developed for MetOp-SG. It provides an overview of the mission, the instrument concept and the key technologies used in the RF assembly. The predicted radiometric and geometric performances are also presented.
{"title":"The Radio Frequency and Calibration Assembly for the MetOp Second Generation MicroWave Imager (MWI)","authors":"C. Bredin, J. Orlhac, T. Decoopman, Pierre-Olivier Antoine, A. Kallel, C. Malassingne, F. Bayle, C. Tabart, A. Catalani, D'Addio Salvatore, T. Lupi","doi":"10.1109/MICRORAD.2018.8430722","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430722","url":null,"abstract":"This paper describes the MWI radiometer being developed for MetOp-SG. It provides an overview of the mission, the instrument concept and the key technologies used in the RF assembly. The predicted radiometric and geometric performances are also presented.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121743350","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}
Pub Date : 2018-03-27DOI: 10.1109/MICRORAD.2018.8430705
N. Skou, S. S. Søbjærg, S. Kristensen, C. Cappellin, K. Pontoppidan, J. R. de Lasson, M. Ivashina, O. Iupikov
A next generation spaceborne radiometer system for hi-quality ocean measurements is discussed. Instead of a classical horn, a focal plane array is used as antenna feed. The antenna beam is created by adding the outputs from many small antenna elements, thus providing an antenna beam of unsurpassed quality. This solves the classical polarization purity and land / sea contamination issues. The concept requires many microwave receivers and fast analog-to-digital converters as well as fast digital signal processing on-board the satellite. This is discussed, and resource budgets, especially concerning power, are provided.
{"title":"Ultra-High Performance C & L-Band Radiometer System for Future Spaceborne Ocean Missions","authors":"N. Skou, S. S. Søbjærg, S. Kristensen, C. Cappellin, K. Pontoppidan, J. R. de Lasson, M. Ivashina, O. Iupikov","doi":"10.1109/MICRORAD.2018.8430705","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430705","url":null,"abstract":"A next generation spaceborne radiometer system for hi-quality ocean measurements is discussed. Instead of a classical horn, a focal plane array is used as antenna feed. The antenna beam is created by adding the outputs from many small antenna elements, thus providing an antenna beam of unsurpassed quality. This solves the classical polarization purity and land / sea contamination issues. The concept requires many microwave receivers and fast analog-to-digital converters as well as fast digital signal processing on-board the satellite. This is discussed, and resource budgets, especially concerning power, are provided.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117314170","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}
Pub Date : 2018-03-27DOI: 10.1109/MICRORAD.2018.8430718
Xi Guo, Hao Liu, Lijie Niu, Cheng Zhang, Hao Lu, C. Huo, Te Wang, Ji Wu
The concept of Geostationary Interferometric Microwave Sounder (GIMS) is based on microwave interferometric radiometer technology with a rotating circular thinned array. A full-scale GIMS engineering demonstrator has been successfully developed, and several field tests have been carried out. This paper is aimed to discuss calibration method and data processing procedure. Also, the experimental performance and imaging results are presented.
{"title":"Data Processing and Experimental Performance of GIMS-II (Geostationary Interferometric Microwave Sounder-Second Generation) Demonstrator","authors":"Xi Guo, Hao Liu, Lijie Niu, Cheng Zhang, Hao Lu, C. Huo, Te Wang, Ji Wu","doi":"10.1109/MICRORAD.2018.8430718","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430718","url":null,"abstract":"The concept of Geostationary Interferometric Microwave Sounder (GIMS) is based on microwave interferometric radiometer technology with a rotating circular thinned array. A full-scale GIMS engineering demonstrator has been successfully developed, and several field tests have been carried out. This paper is aimed to discuss calibration method and data processing procedure. Also, the experimental performance and imaging results are presented.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121886410","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}
Pub Date : 2018-03-27DOI: 10.1109/MICRORAD.2018.8430729
P. Rosenkranz, D. Cimini, M. A. Koshelev, M. Tretyakov
Characterization of forward-model accuracy is a part of retrieval error analysis, as discussed by Rodgers [1]. We estimate correlated uncertainties in the spectroscopic parameters of models for atmospheric microwave absorption by water vapor (Rosenkranz [14] as modified by Turner et al. [2]) and oxygen (Tretyakov et al. [3]). The uncertainties can be correlated either by definition of the parameters (as for the water vapor continuum with line widths) or by the way in which they are measured (as for line mixing in the oxygen band). Spectroscopic parameter correlations affect the resulting uncertainty in calculated opacity and brightness temperature at any given frequency, as well as correlations between different frequencies. Uncertainty-covariance matrices have been calculated for the spectroscopic parameters with significant impact on the 20-to 60-GHz band, and the uncertainties are propagated to downwelling brightness temperatures and ground-based temperature profile and water-vapor profile retrievals.
{"title":"Covariances of Spectroscopic Parameter Uncertainties in Microwave Forward Models and Consequences for Remote Sensing","authors":"P. Rosenkranz, D. Cimini, M. A. Koshelev, M. Tretyakov","doi":"10.1109/MICRORAD.2018.8430729","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430729","url":null,"abstract":"Characterization of forward-model accuracy is a part of retrieval error analysis, as discussed by Rodgers [1]. We estimate correlated uncertainties in the spectroscopic parameters of models for atmospheric microwave absorption by water vapor (Rosenkranz [14] as modified by Turner et al. [2]) and oxygen (Tretyakov et al. [3]). The uncertainties can be correlated either by definition of the parameters (as for the water vapor continuum with line widths) or by the way in which they are measured (as for line mixing in the oxygen band). Spectroscopic parameter correlations affect the resulting uncertainty in calculated opacity and brightness temperature at any given frequency, as well as correlations between different frequencies. Uncertainty-covariance matrices have been calculated for the spectroscopic parameters with significant impact on the 20-to 60-GHz band, and the uncertainties are propagated to downwelling brightness temperatures and ground-based temperature profile and water-vapor profile retrievals.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131106092","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}
Pub Date : 2018-03-01DOI: 10.1109/MICRORAD.2018.8430716
K. Jacob, A. Schröder, A. Murk, L. von Werra, F. Reinhard, P. Raisin
In this work we describe the design and present radiometric measurements of a water-based conical blackbody calibration target prototype to be applied as a precise reference source in laboratories and for the accurate calibration of ground-based microwave instruments. The aqueous calibration target circumvents the conflict between the electromagnetic and thermal properties of traditional calibration target geometries. The temperature controllable target prototype consists of a conical low loss plastic shell which has been manufactured using a stereolithography 3D-printer to define the water surface. Radiometric measurements at 110 GHz demonstrate the outstanding thermal performance of the target prototype at various water temperatures between 10 °C and 60 °C.
{"title":"Radiometric Characterization of a Water-Based Conical Blackbody Calibration Target for Millimetre-Wave Remote Sensing","authors":"K. Jacob, A. Schröder, A. Murk, L. von Werra, F. Reinhard, P. Raisin","doi":"10.1109/MICRORAD.2018.8430716","DOIUrl":"https://doi.org/10.1109/MICRORAD.2018.8430716","url":null,"abstract":"In this work we describe the design and present radiometric measurements of a water-based conical blackbody calibration target prototype to be applied as a precise reference source in laboratories and for the accurate calibration of ground-based microwave instruments. The aqueous calibration target circumvents the conflict between the electromagnetic and thermal properties of traditional calibration target geometries. The temperature controllable target prototype consists of a conical low loss plastic shell which has been manufactured using a stereolithography 3D-printer to define the water surface. Radiometric measurements at 110 GHz demonstrate the outstanding thermal performance of the target prototype at various water temperatures between 10 °C and 60 °C.","PeriodicalId":423162,"journal":{"name":"2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123956090","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}
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