雷達測向 的英文怎麼說

中文拼音 [léidácèxiàng]
雷達測向 英文
radar direction finding
  • 雷 : 1. （雲層放電時發出的響聲） thunder 2. （軍事上用的爆炸武器） mine 3. （姓氏） a surname
  • 達 : Ⅰ動詞1 （暢通） extend 2 （達到） reach; attain; amount to 3 （通曉; 明白） understand thoroughly...
  • 測 : 動詞1. （測量） survey; fathom; measure 2. （測度; 推測） conjecture; infer
  • 雷達 : [訊] radar （縮自 radio detection and ranging）
  1. The ionosphere is a complex medium, which is aeolotropy, asymmetry, dispersive and changes randomly with time. in order to improve the communication quality of the shortwave that depends on the ionosphere, we should have aknowledge of the current condition of the ionosphere in real time. the backscatter sounding of high frequency can diagnose the real - time channel characters for shortwave communication or hf radar, which is great assistant to shortwave communication and hf radar

    電離層是隨機時變，各向異性，非均勻、色散的復雜介質。為了保證依賴于電離層進行的短波通信質量，必須了解電離層的實時狀態信息。高頻返回散射探測可以實時監測與短波通信或高頻天波雷達相關的天波傳播通道的狀態，對短波通信和天波雷達工作起了重要的輔助作用。
  2. Hall, c. 1988 : fist observations of summer polar mesospheric backscatter with a 224 mhz radar, geophys. res. lett., 15, 18 - 31

    採用224兆赫雷達首次測得的夏季極地中間層大氣的後向散射。 「地球物理研究通訊」 ，第15卷28 - 31頁。
  3. Compared with the low range resolution ( lrr ), high range resolution ( hrr ) radar can supply more structure information of targets. it is one of the most important development directions in modern radar. hrr radar has much extensive application prospects in targets detection, targets imaging, targets identification and so on

    高距離分辨雷達較低分辨雷達能提供更多的目標結構信息，是現代軍用雷達裝備的重要發展方向之一，在目標檢測、目標成像和目標識別等方面有極其廣闊的應用前景。
  4. Polarimetric synthetic aperture radar ( polsar ) investigates the transverse vectorial nature of plane em waves and provides the complex scattering matrix of a scatterer. scattering polarimetry is sensitive to the shape, orientation, and dielectric properties of scatters

    極化合成孔徑雷達（ polsar ）研究電磁波的矢量特徵，通過測量和分析目標的極化散射特性，獲取目標的介電常數、物理特性、幾何形狀和取向等方面的大量信息。
  5. A doppler radar only measures the component of the velocity in the line of sight, the so - called radial velocity

    因為多普勒雷達探測到的僅僅是風矢量在徑向上的分量。
  6. First, in order to verify the correct of this retrieval month, by using the data of three - dimensional wind field, raininess field and temperature field that are output by mm5 numerical simulation, we climate the radial velocity field and echo intention field in the in - phase observation area of dual - doppler radar, then, on the base of the upwards retrieval theory and using the radial velocity field and echo intention field in the in - phase observation area of dual - doppler radar, we retrieve the atmospheric three - dimensional wind field

    首先，為檢驗此種反演方法的可靠性，我們使用mm5數值模式輸出的三維風場、雨強場、溫度場等數據，分別模擬生成兩部雷達同步觀測區的徑向速度場和回波強度場，然後根據以上的反演理論利用模擬的雙多普勒天氣雷達觀測到的徑向速度場和回波強度場反演出大氣三維風場。
  7. 4 a block diagram of phased array radar used which is used to measuring the distance, velocity and azimuth of the object in the horizontal plan and the highness in the vertical plane

    4給出了水平方向採用二維譜估計技術測距離、速度和方位，垂直方向採用波束掃描測高的小型車載相控陣雷達系統框圖。
  8. Radar radio detecting and ranging

    雷達無線電定向和測距
  9. For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics

    利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0
  10. This paper ' s study is focused on the principle of bistatic sar on the basis of giving a brief introduction of sar principle, including azimuth resolution, mapping width, focusing deepness, pulse repetition frequency limitation and radar equation etc. then the paper studies the special form of bistatic sar with stationary transmitter

    在簡要介紹了合成孔徑雷達的成像原理后，本文著重從原理方面對雙站sar進行了分析，討論雙站sar的方位向解析度，測繪帶寬，聚焦深度，脈沖重復頻率限制，雷達方程等問題，然後對發射機固定的雙站sar這種特殊的雙站sar模式進行分析。
  11. Ovary development stage of females in catches and radar observation indicated that l. sticticalis migrated to northeast in early june, to southwest in august and september, and locally - bred moths dispersed over shorter distances in july and august

    卵巢發育進度法和雷達觀測表明草地螟在6月初向東北遷飛，在8月和9月向西南遷飛，當地繁殖的蛾子在7 、 8月份進行短距離擴散。
  12. The predictive function control is one of the most novel direction in this area, and it applies in the fast - processes initially, such as robot ' s arm control and radar tracking control, now it applies also in the slow - processes, such as fitful reaction temperature control, etc. the theory and application of the predictive control are studied in this paper

    而預測函數控制是預測控制領域中最新的研究方向之一，近年來，預測函數控制的應用已從最初的快速過程，如工業機器人的手臂控制、雷達跟蹤控制等發展到慢速過程，如間歇反應過程的溫度跟蹤控制等，而且，在國內的應用也已呈逐步發展之趨勢。
  13. Passive detecting and tracing is a promising way to overcome these problems. infrared targets detection is a critical issue in the passive infrared detection system, while infrared weak and small targets detection is one of its core

    無源或被動探測跟蹤技術是解決雷達對抗威脅有希望的途徑，其中利用紅外探測和跟蹤系統進行防禦是一個重要方向，紅外弱小目標檢測是被動紅外探測系統的關鍵技術。
  14. A new distributed fusion method of radar / ir based on separation and combination of the measurements is proposed after analyzing the influence of rate measurement. the rate information separated from the radar measurements composes a fake vector of ir

    在對引入徑向速度測量后雷達跟蹤性能進行分析的基礎上，提出了一種基於測量信息組合優化的雷達/紅外分散式融合方法。
  15. On the contrary, the infrared passive sensors detect and locate the targets in the space by the use of the heat of the targets, and they do n ' t radiate any energy to the space

    和雷達不同，紅外無源探測器通過接收目標輻射的熱能進行定位和跟蹤，不向空中輻射任何能量，因而不易被偵察或定位，具有很強的抗干擾能力。
  16. Mainly this paper discusses applying time - frequency analysis in several questions, including estimation of doppler parameter imaging of sar, detection of moving target and estimation of direction of arrival in array signal processing

    本文討論了時頻分析在合成孔徑雷達成像中的多普勒參數估計的應用、時頻分析在動目標檢測中的應用以及它在信源來波方向估計中的應用。
  17. An on - line minimum - variance estimator was developed for thrust acceleration applied to orbit transfer using discrete - time radar measurements. the mass - flow - rate of propellant was selected as a state variant, which was estimated by employing an integral state model and ekf filter. the variation equations for measurement vector to mass - flow - rate have been established to linearize the discrete - time measurement equations. the algorithm has applied successfully to maneuver process in commanding satellite into geo - stationary orbit. the results show that the algorithm developed here can monitor and determine whether engine works well or failure precisely and quickly during orbit transfer process

    飛行器軌道機動過程中，為跟蹤、定位機動目標和干預機動控制過程，需要統計處理離散的雷達觀測量實時估計推進發動機的推力，進而確定飛行器的瞬時軌道參數.本文所述演算法是該工程問題的探討和解決方案.文章建立了軌道機動過程中連續變質量運動模型和離散雷達量測模型，推進發動機的質量秒耗量作為表徵推力加速度的一個近似常量，應用擴展卡爾曼濾波對離散的雷達測量數據進行順序統計處理給出秒耗量的最小方差估計;文章詳細地推導了線性化量測模型的變分方程和觀測矩陣;模擬結果表明該演算法能快速、準確地估計推進發動機的質量秒耗量和向機動目標施加的實際推力
  18. Using a simple radiative transfer model for vegetation volume scattering and the integral equation model ( ibm ) for surface scattering with the field in situ measurements as the input, we compared the simulated and sar measured backscattering coefficients in different agricultural fields

    特別是在植被覆蓋地表，對其下土壤水分的監測更帶有極大的困難性。因此，利用雷達後向散射系數反演土壤水分必須首先充分理解微波與地表的相互作用過程。
  19. Because of video velocity measurement ' s merits in prevention of electronic interference, being able to measure several vehicles " velocity at the same time, low cost, high flexibility, it will be development trend of velocity measurement technology

    該技術克服了雷達測速儀抗電子干擾弱，不能進行多車測速等主要缺點，具有抗電子干擾，精確度高，成本低，靈活性強等優點，是今後車速檢測技術的發展方向。
  20. Psr is a radio detection equipment that provides information on range and bearing of aircraft in the form of a target blip on the radar screen to air traffic controllers by transmitting radar pulses and detecting the reflected signals from the aircraft. no active transponder or avionics on board aircraft has to be relied on

    監察雷達發出雷達脈沖，偵測從飛機反射回來的信號，便可計算飛機的距離及方位，並以目標點在雷達屏向航空交通管制員顯示，而不須依靠航機上的應答機或其他航空器材。
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