資源描述:
《分布式InSAR系統(tǒng)技術綜述.pdf》由會員上傳分享,免費在線閱讀,更多相關內(nèi)容在行業(yè)資料-天天文庫。
1、上海航天38AERoSPACESHANGHAI第28卷2011年第4期文章編號:1006—1630(2011)04—0038—09分布式InSAR系統(tǒng)技術綜述李威,李春升,時信華。,郝曉龍。(1.上海衛(wèi)星工程研究所,上海200240;2.北京航空航天大學電子信息工程學院,北京100191;3.北京跟蹤與通信技術研究所,北京100094)摘要:概述分布式衛(wèi)星干涉合成孔徑雷達(InSAR)系統(tǒng)的定義、組成、工作體制、應用領域及特點。綜述了4個典型的分布式衛(wèi)星InSAR系統(tǒng)發(fā)展現(xiàn)狀,分析了總體技術、編隊控制、三同步和基線測量四項系統(tǒng)關鍵技術。討論了分布式衛(wèi)星InSAR系統(tǒng)的
2、高分辨率與寬觀測帶、實時與準實時和多功能發(fā)展方向。針對可實現(xiàn)高分辨率與寬觀測帶的多通道技術,分析了相位中心個數(shù)與重頻的關系,并以一發(fā)三收模式為例,設計分辨率1m、觀測帶寬度30km波位參數(shù),并分析總結(jié)其技術難點。針對有望實現(xiàn)實時與準實時監(jiān)視的中、高軌InSAR系統(tǒng),分析了處理器帶寬、合成孔徑時間、天線尺寸、峰值功率和基線等參數(shù)與軌道高度的相互關系。以軌道高度3O000km為例,設計分辨率5m、覆蓋范圍600km波位參數(shù),分析并總結(jié)了系統(tǒng)的關鍵技術。關鍵詞:分布式衛(wèi)星InSAR系統(tǒng);多通道;高軌SAR中圖分類號:TN958文獻標志碼:ATechnologyReviewo
3、nDistributedSatelliteInSARSystemLIWei,LIChun—sheng。,SHIXin—hua。,HAOXiao—long。(1.ShanghaiInstituteofSatelliteEngineering,Shanghai200240,China;2.SchoolofElectronicsandInformationEngineering,BeijingUniversityofAeronauticsandAstronautics,Beijing100191,China;3.BeijingInstituteofTrackingandTe
4、lecommunicationTechnology,Beijing100094,China)Abstract:Thedefinition,composition,workmode,applicationfieldsandcharacteristicsofthedistributedsatelliteInSARsystemwereoverviewedinthispaper.ThedevelopmentofthefourtypicaldistributedsatelliteInSARsystemswassummarized.The4keytechnologiesofint
5、egrationtechnology,formationcontrol,threesynchronizationandbaselinemeasurementwereanalyzed.Thedevelopingtrendswhichwerehigh-accuracyandwide—bandobservation,real—timeandquasireal—timemonitoring,multi—functionapplicationwerediscussed.Therelationshipbetweenthenumberofphasecenterandrepetiti
6、onfrequencywasanalyzedforthemulti-channeltechnologywithhighaccuracyandwidebandobservation.Theparametersweredesignedforasystemofonetransmitterandthreereceiverwithaccuracy1mandbeamposition30km,andthekeysweresummarized.Therelationshipsbetweentheorbitalaltitudeandparameterssuchasprocessorba
7、ndwidth,syntheticaperturetime,antennasize,peakpowerandbaselinewerediscussedforInSARsystemswhichwouldrealizethereal—timeandquasireal-timemonitoring.Thesystemparametersofthesystemworkingonorbitalaltitude30000kmwiththeaccuracy5mandbeamposition600kmweredesigned,andkeytechnologieswe