{"title":"Report on second space weather workshop","authors":"Luca Spogli;Jan Budroweit","doi":"10.23919/URSIRSB.2020.9663140","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9663140","url":null,"abstract":"The workshop was held on the virtual platform offered by the Ninth Annual IEEE International Conference on Wireless for Space and Extreme Environments (WiSEE) conference on 13–14 October 2021, 17:00–19:00 GMT each day. The workshop was open to the space weather community in the broader sense. It was aimed at pinpointing the state-of-the art technologies and initiations facing space weather threats and their impacts in extreme environments, with a particular focus on space and aviation domains.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 375","pages":"80-81"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9663119/09663140.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50329072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"URSI commission triennial reports available","authors":"","doi":"10.23919/URSIRSB.2020.9663137","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9663137","url":null,"abstract":"The triennial reports of the Scientific Commissions of URSI are available for downloading from the URSI Web site (www.ursi.org). They can be accessed by going to the drop-down tab for the individual Commission under Scientific Commissions at the top of the home page, and then clicking on the Commission Reports tab. The reports for the most-recent triennium may be accessed directly by using the following URLs:","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 375","pages":"75-75"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9663119/09663137.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50329068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metrology of reflector antennas: A historical review","authors":"Jacob W. M. Baars","doi":"10.23919/URSIRSB.2020.9663125","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9663125","url":null,"abstract":"The emergence of radio astronomy, space research, and satellite communication after World War II created great activity in the design and construction of reflector antennas of increasing size and precision, compared to the small radar antennas of the war period. With few exceptions, the reflectors consisted of a set of panels, typically a few square meters in size, that were supported on a backup structure. To be an effective reflector, the shape needs to obey the prescribed contour with a precision of about one-twentieth of the shortest operational wavelength. This was achieved with the aid of a continuously improving array of metrology methods, from the original geodetic theodolite-tape to current laser-trackers, digital photogrammetry, and radio holography. We review the historical development by summarizing the different methods and illustrating their applications with examples, mainly from the field of radio astronomy. It is here where the largest and most precise reflectors have been installed, and metrology has been pushed to a level where a reflector of 100 m diameter can be realized with a surface error of about 250 μm, and a 12 m diameter submillimeter telescope with an error of about 10 μm. The reference list is not exhaustive: it covers major papers of a general nature and detailed descriptions of the examples presented in the text. Table 1 provides a list of the acronyms used in the paper.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 375","pages":"10-32"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9663119/09663125.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50329065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Information for authors","authors":"","doi":"10.23919/URSIRSB.2020.9663145","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9663145","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 375","pages":"116-116"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9663119/09663145.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50329077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"List of URSI officials","authors":"","doi":"10.23919/URSIRSB.2020.9663143","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9663143","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 375","pages":"85-94"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9663119/09663143.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50329073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Historical corner column: Foreword","authors":"Giuseppe Pelosi","doi":"10.23919/URSIRSB.2020.9663132","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9663132","url":null,"abstract":"Recently, I have been trying to widen the topics of this column, which in the past have been more focused on those relative to Commission B, Fields and Waves, due to my background. The contribution to this issue, \"The Roots of Modern Cryptography: Leon Battista Alberti's ‘De Cifris’,\" by Stefano Selleri (University of Florence), is more aimed at Commission C, Radiocommunication Systems and Signal Processing. This is because it deals with encryption and code breaking, topics that are as hot as ever in this era, in which all kinds of bank transactions, signatures of agreements, and so on occur via the Internet. This is indeed an expansion of the contribution by G. Pelosi and S. Selleri, \"Florence and a Leap in Cryptography: The Leon Battista Alberti Cypher Disk,\" presented at IEEE HISTELCON 2021, Moscow, Russia, 10–12 November 2021.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 375","pages":"53-54"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9663119/09663132.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50329252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Maxwell foundation newsletter available","authors":"","doi":"10.23919/URSIRSB.2020.9663138","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9663138","url":null,"abstract":"The summer edition of the Clerk Maxwell Foundation Newsletter is available for downloading at https://clerkmaxwellfoundation.org/Newsletter_2021_Summer.pdf.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 375","pages":"75-75"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9663119/09663138.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50329070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Alphabetical index and co-ordinates","authors":"","doi":"10.23919/URSIRSB.2020.9663144","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9663144","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 375","pages":"95-115"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9663119/09663144.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50329074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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