版權(quán)說明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)
文檔簡(jiǎn)介
1、Radartransponders(Racons)fthefutureAuth:Dr.NickWardBackgroundIMOMaritimeSafetyCommittee(MSC)ofthe79thmeetinginsection192(79)whichadoptedthenewstardsoftheradarfrom2008ontheabolitionofSbradartransponderstriggerrequirements
2、.Themeasuresaimedatpromotingtheintroductionofnewtechnologies(suchascoherentmodulation)tofacilitatefutureimprovementsinradarclutterintheabilitytodetecttargetsthusimprovingsecurity.Thesetechnologiescanalsoreducedisttionlau
3、nchblaunchpromotetheefficientuseofspectrum.From2008thesetechnologiescanbeappliedtothenewSbradar.Sbisparticularlyusefulinthewstrainsnowclutterenvironment.BecauseofitsabilitytodetectdisplayadvantagesSbradarisgenerallyconsi
4、deredbettersuitedasAPRA(automaticradarplottingdevices)collisionavoidanceradar.Althoughthenewtechnologiesaimedatenhancingsecuritytheuseofthistechnologyalmostdonottriggertheradarofexistingradartransponder.Radartransponderw
5、asconsideredaveryimptantnavigationaltoolbecausetheycanbeverypovisibilityinthecaseofrecognitionratherthanrelyonbuoypositioningGNSS.Overallthenewradartechnologycompatiblewiththeradartranspondertoresearchdevelopmentbutatpre
6、sentthesenewtechnologiesnotrelatedtoindustrystardsrecommendations.AtpresenttheapplicationofnewtechnologiesftheSbradarofthematyrequirementsofloadingalsodidnotmentionontheagenda.SimilarlytheexistingSbradarphaseoutscheduleh
7、asnotplanned.Newradartechnologywillhavesomenewacteristicsoftheoperationtheneedfoperattraining.Xbradarontherequesthasnotchanged.InthefeseeablefuturestillrequireXbradartriggersearchrescuevehicleradartransponderradartranspo
8、nders(SART).NewtechnologiesintheSbradarwillbedecidedXbradarfuturedevelopmentplansasafacttherefeitwassuggestedthattheIMOtoamendtherequirementsofSARTwillchangeitfromradarbasedbasedAISothertechniques.NewradartechnologyInter
9、nationalMaritimeRadioCommittee(CIRM)ProfessofNrisexplainedthattheradartechnologyconstantlychangingftheidentificationoftheClutteroffersthepotentialfincreasetheuserthatthecurrentmarineradarperfmanceinthisregardcannotmeetth
10、erequirements.MeeffectivecontrolofbwidthcanalsoimprovethecompatibilityofotherusersRF(radiofrequencyIndertoobtainbetterCluttertargetresolutionneeds20MHzevenhigherbwidth.Anypulsedurationothersitestowaveintheyarefeasiblecan
11、usepulsecompressiontechnologyacquisitionfromthedifferential.WithfrequencyphasemodulationAM(ifpossible)pulse.Continuouspulsemaynotbethesame.Ifyouuseafixedphasearrayantennasmaynotbeabletoproduceacontinuousbeamazimuthflybac
12、kevenwiththerotatingantennatoantennapointingbefebackwarddirectionofancillaryfacilities.AlternativetechnologiesUnderstablyinahighlycompetitiveenvironmentmanufacturersdonotwanttotalkaboutthemisstillinthedevelopmentprocesss
13、olutions.Eachvendsolutionsmaybetotallydifferentnotallcompaniesarethemostimptantnewtechnologyprogrammes.Maybecomeanalternativetechnologiesincludingintheshtcoherentsuchaspulseratethewave(CW).Coherentshtpulseisgiventominimi
14、zethehlingoftheinherentgooddistanceresolutiondonothaveadistancesidelobe(fromthesidelobeLuanzhendistanceintherealtargetsofredundancy“echo“mayhaveapulsecompressionprocess).Thiswillbeabettershttermperfmancethatthesolutionto
15、theexistingSbradartranspondercompatible.Howeveritneedshighpeakpowerpulsesmayalsoneedtousecoherentmagronduetotheneedfhighvoltagebutalsoinaveryshtpulseinthemaintenancephasefrequencystabilityisverydifficultthetechnologymeex
16、pensive.Mediumcoherentpulsewidthcanberelativelyeasilyinapulseofabetterfrequencyphasestabilitybutalsoislikelytopulseshapethedesignwhichwereoptimizedshtrangemediumrangelongrangeperfmance.Thesetechnologiescanbepartofthatwit
17、htheexistingSbradartranspondercompatible.Howeverthetechnologyrequiresatravelingwavetube(TWT)relatedtohighpowersemiconductamplifier(afewhundredwattsofpeakpower)theremayberelativelyexpensive.Theavailabilityofsufficientdist
18、ancefromthelowsidelobeisalsoaproblem.otherpiecesofradar(CWRadar)peakpowerneedsoftherelativelylow(10Wofpowermaybesufficient)youcanusepricesaffdablestableperfmanceofsemiconducttechnology.AtpresentapossiblemodulationFMCWist
19、heonealreadyexistsweallfullyundersttheNavysradarnavigationtechnology.Basedonthechoiceofnoisemodulationcanremovealltheradarofradarinterferenceeffects(ofthetechnologyhasbeenusedfmilitaryradarontheLPI).Radarotherpiecesofthe
溫馨提示
- 1. 本站所有資源如無特殊說明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
- 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
- 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁內(nèi)容里面會(huì)有圖紙預(yù)覽，若沒有圖紙預(yù)覽就沒有圖紙。
- 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
- 5. 眾賞文庫僅提供信息存儲(chǔ)空間，僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
- 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請(qǐng)與我們聯(lián)系，我們立即糾正。
- 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。
評(píng)論
0/150
提交評(píng)論