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[HD] Radar Si-gnals

 
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MessagePosté le: Ven 20 Mai - 17:45 (2016)    Sujet du message: [HD] Radar Si-gnals Répondre en citant




Radar Signals > urlin.us/2bnhi





Ku,,,1218GHz,,,1.672.5cm,,,High-resolution,,,,also,,,used,,,for,,,satellite,,,transponders,,,,frequency,,,under,,,K,,,band,,,(hence,,,'u'),,,K,,,1824GHz,,,1.111.67cm,,,From,,,German,,,kurz,,,,meaning,,,'short';,,,limited,,,use,,,due,,,to,,,absorption,,,by,,,water,,,vapour,,,,so,,,Ku,,,and,,,Ka,,,were,,,used,,,instead,,,for,,,surveillanceSlotted,,waveguide[edit]Hearst,,MagazinesMost,,2D,,surveillance,,radars,,use,,a,,spoiled,,parabolic,,antenna,,with,,a,,narrow,,azimuthal,,beamwidth,,and,,wide,,vertical,,beamwidthAs,,,,an,,,,example,,,,,Doppler,,,,weather,,,,radar,,,,with,,,,a,,,,pulse,,,,rate,,,,of,,,,2kHz,,,,and,,,,transmit,,,,frequency,,,,of,,,,1GHz,,,,can,,,,reliably,,,,measure,,,,weather,,,,up,,,,to,,,,150m/s,,,,(340mph),,,,,but,,,,cannot,,,,reliably,,,,determine,,,,radial,,,,velocity,,,,of,,,,aircraft,,,,moving,,,,1,000m/s,,,,(2,200mph)Radio,,,signals,,,broadcast,,,from,,,a,,,single,,,antenna,,,will,,,spread,,,out,,,in,,,all,,,directions,,,,and,,,likewise,,,a,,,single,,,antenna,,,will,,,receive,,,signals,,,equally,,,from,,,all,,,directionsFurther,,,information:,,,Polarization,,,(waves)Definitions,,,Military,,,,applications,,,,require,,,,medium,,,,PRF,,,,which,,,,prevents,,,,range,,,,from,,,,being,,,,determined,,,,directly,,,,,and,,,,range,,,,ambiguity,,,,resolution,,,,processing,,,,is,,,,required,,,,to,,,,identify,,,,the,,,,true,,,,range,,,,of,,,,all,,,,reflected,,,,signalsXXXVIII,,in,,History,,of,,Communications,,-Electronics,,in,,the,,United,,States,,Navy,,,1963;,,Radar,,^,,Watson,,,Raymond,,C.,,,JrPenley,,,,,Bill,,,,,and,,,,Jonathan,,,,Penley,,,,,"Early,,,,Radar,,,,Historyan,,,,Introduction"Introduction,,,to,,,airborne,,,radarISBN978-1-58053-338-6Most,,,,Secret,,,,WarISBN978-0-07-057913-2It,,,,has,,,,become,,,,the,,,,primary,,,,tool,,,,for,,,,short-term,,,,weather,,,,forecasting,,,,and,,,,watching,,,,for,,,,severe,,,,weather,,,,such,,,,as,,,,thunderstorms,,,,,tornadoes,,,,,winter,,,,storms,,,,,precipitation,,,,types,,,,,etcIn,,all,,electromagnetic,,radiation,,,the,,electric,,field,,is,,perpendicular,,to,,the,,direction,,of,,propagation,,,and,,this,,direction,,of,,the,,electric,,field,,is,,the,,polarization,,of,,the,,waveThe,,,,maximum,,,,return,,,,would,,,,be,,,,detected,,,,with,,,,an,,,,antenna,,,,at,,,,right,,,,angles,,,,to,,,,the,,,,target,,,,,and,,,,a,,,,minimum,,,,with,,,,the,,,,antenna,,,,pointed,,,,directly,,,,at,,,,it,,,,(end,,,,on)Popular,,,,MechanicsFurther,,,,information:,,,,Time,,,,of,,,,flightLook,,,up,,,radar,,,in,,,Wiktionary,,,,the,,,free,,,dictionaryOwing,,,to,,,its,,,lower,,,cost,,,and,,,less,,,wind,,,exposure,,,,shipboard,,,,airport,,,surface,,,,and,,,harbour,,,surveillance,,,radars,,,now,,,use,,,this,,,approach,,,in,,,preference,,,to,,,a,,,parabolic,,,antennaStatistical,,,analysis,,,is,,,then,,,applied,,,to,,,calculate,,,variations,,,in,,,the,,,ensemble,,,of,,,detected,,,pulsesHis,,,,system,,,,already,,,,used,,,,the,,,,classic,,,,antenna,,,,setup,,,,of,,,,horn,,,,antenna,,,,with,,,,parabolic,,,,reflector,,,,and,,,,was,,,,presented,,,,to,,,,German,,,,military,,,,officials,,,,in,,,,practical,,,,tests,,,,in,,,,Cologne,,,,and,,,,Rotterdam,,,,harbour,,,,but,,,,was,,,,rejected.[9]Signal,,,design,,,for,,,good,,,correlation:,,,for,,,wireless,,,communication,,,,cryptography,,,,and,,,radarThis,,,requires,,,the,,,use,,,of,,,medium,,,pulse-repetition,,,frequency,,,with,,,phase,,,coherent,,,hardware,,,that,,,has,,,a,,,large,,,dynamic,,,rangeIt,,,,operated,,,,on,,,,a,,,,50cm,,,,wavelength,,,,and,,,,the,,,,pulsed,,,,radar,,,,signal,,,,was,,,,created,,,,via,,,,a,,,,spark-gapIt,,,can,,,be,,,seen,,,that,,,as,,,the,,,relative,,,velocity,,,increases,,,,a,,,point,,,will,,,be,,,reached,,,where,,,the,,,spectral,,,lines,,,that,,,constitute,,,the,,,echoes,,,are,,,hidden,,,or,,,aliased,,,by,,,the,,,next,,,sideband,,,of,,,the,,,modulated,,,carrier^,,Frederick,,Seitz,,,Norman,,GReflections,,,from,,,terrain,,,,water,,,,and,,,weather,,,produce,,,signals,,,much,,,larger,,,than,,,aircraft,,,and,,,missiles,,,,which,,,allows,,,fast,,,moving,,,vehicles,,,to,,,hide,,,using,,,nap-of-the-earth,,,flying,,,techniques,,,and,,,stealth,,,technology,,,to,,,avoid,,,detection,,,until,,,an,,,attack,,,vehicle,,,is,,,too,,,close,,,to,,,destroyRadar,,,,frequency,,,,bands,,,,Band,,,,name,,,,Frequency,,,,range,,,,Wavelength,,,,range,,,,Notes,,,,HF,,,,330,,,,MHz,,,,10100,,,,m,,,,Coastal,,,,radar,,,,systems,,,,,over-the-horizon,,,,radar,,,,(OTH),,,,radars;,,,,'high,,,,frequency',,,,VHF,,,,30300MHz,,,,110,,,,m,,,,Very,,,,long,,,,range,,,,,ground,,,,penetrating;,,,,'very,,,,high,,,,frequency',,,,P,,,,1m,,,,'P',,,,for,,,,'previous',,,,,applied,,,,retrospectively,,,,to,,,,early,,,,radar,,,,systems;,,,,essentially,,,,HF,,,,+,,,,VHF,,,,UHF,,,,3001000MHz,,,,0.31,,,,m,,,,Very,,,,long,,,,range,,,,(e.gPopular,,,ScienceFor,,,instance,,,,the,,,first,,,system,,,to,,,be,,,deployed,,,,Chain,,,Home,,,,used,,,two,,,straight,,,antennas,,,at,,,right,,,angles,,,for,,,reception,,,,each,,,on,,,a,,,different,,,displayISBN978-1-85326-699-7Nadav,,,,Levanon,,,,,and,,,,Eli,,,,MozesonList,,,,of,,,,radars,,,,Chain,,,,Home,,,,and,,,,Chain,,,,Home,,,,Low,,,,Hohentwiel,,,,radar,,,,H2S,,,,radar,,,,SCR-270,,,,radar,,,, f5880b0734



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