{"title":"超宽带低频SAR","authors":"H. Hellsten","doi":"10.1109/MWSYM.1992.188295","DOIUrl":null,"url":null,"abstract":"The significance of low-frequency ultrawideband (UWB) radar imagery has been investigated. In order to verify the theoretical predictions, an airborne SAR (synthetic aperture radar) system, operating over the frequency band 20-90 MHz, has been developed. CARABAS (coherent all radio band sensing) adopts a major part of the shortwave radio band for the transmission and reception of UWB signals. As a result, the system has a high geometric resolution, in particular in relation to the emitted wavelengths. A first data collection campaign took place in January 1992; initial data are still in the phase of evaluation. In the wavelength interval adopted, vegetation is transparent and radiation penetrates the ground to a significant degree. The system is considered capable of mapping structures and objects obscured by vegetation or buried in the ground.<<ETX>>","PeriodicalId":165665,"journal":{"name":"1992 IEEE Microwave Symposium Digest MTT-S","volume":"162 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":"{\"title\":\"CARABAS-an UWB low frequency SAR\",\"authors\":\"H. Hellsten\",\"doi\":\"10.1109/MWSYM.1992.188295\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The significance of low-frequency ultrawideband (UWB) radar imagery has been investigated. In order to verify the theoretical predictions, an airborne SAR (synthetic aperture radar) system, operating over the frequency band 20-90 MHz, has been developed. CARABAS (coherent all radio band sensing) adopts a major part of the shortwave radio band for the transmission and reception of UWB signals. As a result, the system has a high geometric resolution, in particular in relation to the emitted wavelengths. A first data collection campaign took place in January 1992; initial data are still in the phase of evaluation. In the wavelength interval adopted, vegetation is transparent and radiation penetrates the ground to a significant degree. The system is considered capable of mapping structures and objects obscured by vegetation or buried in the ground.<<ETX>>\",\"PeriodicalId\":165665,\"journal\":{\"name\":\"1992 IEEE Microwave Symposium Digest MTT-S\",\"volume\":\"162 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1992-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"11\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"1992 IEEE Microwave Symposium Digest MTT-S\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MWSYM.1992.188295\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"1992 IEEE Microwave Symposium Digest MTT-S","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSYM.1992.188295","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The significance of low-frequency ultrawideband (UWB) radar imagery has been investigated. In order to verify the theoretical predictions, an airborne SAR (synthetic aperture radar) system, operating over the frequency band 20-90 MHz, has been developed. CARABAS (coherent all radio band sensing) adopts a major part of the shortwave radio band for the transmission and reception of UWB signals. As a result, the system has a high geometric resolution, in particular in relation to the emitted wavelengths. A first data collection campaign took place in January 1992; initial data are still in the phase of evaluation. In the wavelength interval adopted, vegetation is transparent and radiation penetrates the ground to a significant degree. The system is considered capable of mapping structures and objects obscured by vegetation or buried in the ground.<>
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