{"title":"CSCAT后向散射测量的空间响应函数","authors":"Liling Liu, Yongli Li, Xiaolong Dong, Wenming Lin, Fei Zhao","doi":"10.1109/IGARSS46834.2022.9883660","DOIUrl":null,"url":null,"abstract":"The China-France Oceanography Satellite (CFOSAT) scatterometer (CSCAT) is a rotating range-gated fan-beam scatterometer which is designed to measure the normalized radar backscatter. Because of its high spatial sampling density, CSCAT data is suited for land and ice applications facilitated by resolution enhancement algorithms. Generally, such algorithms require accurate knowledge of the spatial response function (SRF) for the individual measurement. Standard CSCAT L1B products include the locations of the backscatter measurements, but not the SRF. In the paper, the mathematical expression of CSCAT slice SRF is derived, and the shape of the SRF is investigated. It has been found that the SRF can be approximated as a binary function that is 1 inside the −3dB contour of the SRF and 0 outside. The shapes of CSCAT SRF varies with antenna rotation angle and orbit position.","PeriodicalId":426003,"journal":{"name":"IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium","volume":"38 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Spatial Response Function of CSCAT Backscatter Measurements\",\"authors\":\"Liling Liu, Yongli Li, Xiaolong Dong, Wenming Lin, Fei Zhao\",\"doi\":\"10.1109/IGARSS46834.2022.9883660\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The China-France Oceanography Satellite (CFOSAT) scatterometer (CSCAT) is a rotating range-gated fan-beam scatterometer which is designed to measure the normalized radar backscatter. Because of its high spatial sampling density, CSCAT data is suited for land and ice applications facilitated by resolution enhancement algorithms. Generally, such algorithms require accurate knowledge of the spatial response function (SRF) for the individual measurement. Standard CSCAT L1B products include the locations of the backscatter measurements, but not the SRF. In the paper, the mathematical expression of CSCAT slice SRF is derived, and the shape of the SRF is investigated. It has been found that the SRF can be approximated as a binary function that is 1 inside the −3dB contour of the SRF and 0 outside. The shapes of CSCAT SRF varies with antenna rotation angle and orbit position.\",\"PeriodicalId\":426003,\"journal\":{\"name\":\"IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium\",\"volume\":\"38 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-07-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IGARSS46834.2022.9883660\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IGARSS46834.2022.9883660","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The Spatial Response Function of CSCAT Backscatter Measurements
The China-France Oceanography Satellite (CFOSAT) scatterometer (CSCAT) is a rotating range-gated fan-beam scatterometer which is designed to measure the normalized radar backscatter. Because of its high spatial sampling density, CSCAT data is suited for land and ice applications facilitated by resolution enhancement algorithms. Generally, such algorithms require accurate knowledge of the spatial response function (SRF) for the individual measurement. Standard CSCAT L1B products include the locations of the backscatter measurements, but not the SRF. In the paper, the mathematical expression of CSCAT slice SRF is derived, and the shape of the SRF is investigated. It has been found that the SRF can be approximated as a binary function that is 1 inside the −3dB contour of the SRF and 0 outside. The shapes of CSCAT SRF varies with antenna rotation angle and orbit position.
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