雷達回波 的英文怎麼說

中文拼音 [léidáhuíbō]
雷達回波 英文
radar echo
  • 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...
  • 回 : 回構詞成分。
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 雷達 : [訊] radar （縮自 radio detection and ranging）
  1. However, the radio wave can then reflect back of the earth and become refracted again to return earthwards once more. this can sometimes occur a number of times with little attenuation but some fading

    在雷達探測中可以利用此方法，初步確定雷達回波中哪個地區會出現陷獲折射回波，為進一步分析從雷達回波反演大氣層結提供了可能。
  2. Chapter 2 deals with the ground echo signal of sar, and establishes the signal models of static target and moving target

    第二章研究了合成孔徑雷達回波信號，建立了靜止目標和運動目標的回波模型。
  3. Ionosphere decontamination of high frequency radar echoes

    高頻雷達回波信號去電離層污染
  4. Furthermore, the question of feature extraction of three millimeter pulsed radar echo using wavelet neural network is investigated

    此外，論文還研究了用小波補經網路提取三毫米脈沖體制雷達回波信號特徵的問題。
  5. In this paper, wavelet neural network is used to extract the signal feature of three millimeter pulsed radar, and the simulation is done by the computer

    本文將小波神經網路用於三毫米脈沖體制雷達回波信號特徵的提取並做了計算機模擬。
  6. 7. in chapter 8, a new method for estimating the doppler and multipath time delay of the overlapping echoes for lfm pulse radar by only one period pulse signal is presented

    7 .在第八章提出了一種對lfm脈沖雷達回波d叩pler頻移和多徑時延進行聯合估計的方法。
  7. In sar system, the in - phase and quadrate echoes must be sampled simultaneity and stored for a long - time. because of the limitation of hardware, only the available echoes can be stored

    Sar系統對數據採集和存儲處理需要滿足對正交兩路（ i / q ）雷達回波信號的數據同時採集，並實現高速傳輸和大容量長時間實時存儲。
  8. Initial coastline sampling data, racon position data and sart position data are acquired from sea chart by digitizer. all of the initial data are saved with predefined data structure in data files

    雷達回波中的海岸線、雷康和sart的原始數據是通過數字化儀從海圖中采樣獲取的，獲取后的數據按照預先設計好的數據結構保存在了特定類型的文檔中。
  9. Radar echoes include echoes of lands, islands, all kinds of moving targets, racon, sart and sea, etc. arpa marks consist of fixed range marker, variable range marker, electronic bearing line, guard zone, heading - line, parallel index ( 4 navigation lines ), vector lines ( or pad ) and past track information of tracked target ships, marks of trial manoeuvres, ect

    雷達回波包括陸地、島嶼回波，各種活動目標的回波，雷康、 sart回波，海雜波等。 arpa符號包括包括固定距標圈、活動距標圈、電子方位線、警戒圈、船首線、 pi線、已錄取目標的矢量線以及歷史航跡（或pad ） 、試操船符號等。
  10. All of the above will be explained in details in chapter 4 section 1. 2 ) simulation of sea echo determines the quality of radar echo image to a great extent

    2 ）雷達回波中海雜波生成模擬的模擬程度，在很大程度上也決定了雷達回波圖橡的質量。
  11. Super - resolution spatial spectrum estimation is applied in this dissertation to realize bearing resolution by utilizing the different bearings between targets and first - order sea echoes. the simulation of radar echoes in one resolution cell is presented based on the theoretically analyzing hf sea clutter sea clutter reflection characteristic and sea echo spectrum stretching mechanics

    本文從分析高頻海雜波反射特性以及平臺運動引起海浪展寬機理入手，建立便於理論研究的一階展寬的海雜波和二階海雜波模型;在分辨單元上對雷達回波信號進行了模擬。
  12. The conventional sphere model of earth and circle model of orbit are discarded, and the ellipsoid model and the ellipse model are selected for further research, which achieves a method to determine the target position through the antenna pointing direction. and the spaceborne sar system design and simulation software is brought forth. this software accomplishes sar system coefficients design for antenna area, pulse repetition frequency, signal bandwidth, downlink data rate, radar transmitter power and satellite platform yaw steering

    本文從星載雷達的星地幾何關系入手，舍棄傳統星載合成孔徑雷達研究中的球地球模型和圓軌道模型，研究了在地球橢球模型和橢圓軌道模型下由雷達天線確定目標坐標的方法，並在此基礎上研製了星載合成孔徑雷達系統設計與模擬軟體，完成雷達系統天線尺寸、脈沖重復頻率、信號帶寬、雷達信號數據率、雷達發射功率、衛星平臺的偏航牽引等幾個方面的系統參數設計以及雷達多普勒特性、雷達系統模糊、雷達定位及精度的分析，最後完成雷達回波信號的模擬。
  13. Wavelet packet transform is used to improve the snr of the incoherent integral radar echo, and bispectrum algorithm is used for signal detection in this united detecting algorithm, based on the modeling for the through - wall radar echo

    在對穿墻雷達回波信號建模的基礎上，用聯合演算法將非相干累積后的回波信號經過小波包變換提高信噪比，再用雙譜演算法進行信號檢測。
  14. Main conclusions drawn from the analyses of calculating results are as follows : ( 1 ) the microwave absorption of atmosphere gas have obvious attenuation at the wavelengths for cloud detection, thereinto, the water attenuation effect changes greatly, so the 94ghz cloud detecting radar should have water vapor attenuation correction scheme. ( 2 ) when 37ghz and 94ghz radars detect clouds, the difference between the atmosphere and cloud attenuation and the large variety of radar reflectivity conduce the intension of the radar backscatter signals change. ( 3 ) for the thin cloud layer and low water content of cloud, 37 - ghz radar backscatter signals are not as good as 94 - ghz radar, that is to say that the 94ghz radar has better capability in thin clouds detection

    本工作得出如下結論： （ 1 ）大氣氣體的微波吸收在測雲波段產生明顯的衰減，其中水汽衰減效應變化很大；即將上天的空間94ghz測雲雷達必須有水汽衰減訂正方案； （ 2 ） 37ghz和94ghz雷達測雲，由於大氣和雲衰減不同和雷達反射率的很大差異，導致雷達回波信號強弱不同； （ 3 ）對雲層較薄、含水量較少的雲，在不計雷達參數的情況下， 37ghz雷達回波信號不如94ghz測雲雷達，也就是說94ghz對薄雲有更強的探測能力；對雲層較厚、含水量大的雲，由於強衰減的作用， 94ghz雷達回波信號小於37ghz雷達； （ 4 ）從大氣衰減的不利因素方面考慮，空間94ghz雷達測高層薄雲的效果最好；測低層薄雲時需要考慮氣體衰減訂正；因濃厚雲的強衰減作用，探測其中下部的能力大大減弱，不僅要進行衰減訂正，而且要藉助其他信息來反演整個雲層的含水量垂直分佈； （ 5 ）為了獲得從極薄到極濃厚雲的垂直分佈探測能力，未來測雲雷達系統最好採用雙波長甚至三波長（如94 、 37和13ghz ） 。
  15. As for a space - based cloud radar, the change of the radar reflectivity n and the change of attenuation rate along with the cloud liquid water content have been compared between 37 ghz and 94ghz. the transmittance t of single level cloud for different heights and liquid water content has also been calculated at 2 frequencies. by defining a = n tr, which combines both effects of radar reflectivity and transmittance, we have examined the values of a at 37ghz and 94ghz for high, middle and low cloud liquid water contents

    對空間測雲雷達，討論了37ghz和94ghz這兩個頻率的雷達反射率和衰減系數隨雲液水含量的變化；計算了不同高度的單層雲在不同頻率，不同含水量情況下的雲層透過率_ ；定義a = _來綜合考慮雷達反射率和透過率對空間測雲雷達回波的影響，分析比較了雲含水量高、中、低時37ghz和94ghz的a值大小。
  16. This article, through analysis different system radar ’ s superiority and limitation in target identification, proposes to unite the convention air defense radar ’ s echo characteristic and the electronic support sensory system ’ s aircraft - borne radiant characteristic, structure reasonable recognition system. it can satisfie the airplane target identification demand under the different background

    本文通過分析不同體制雷達在目標識別上的優勢和局限性，提出把常規防空雷達回波特徵和電子支援偵察系統得到的機載輻射源特徵聯合起來，構造合理的識別系統的新思路，以此來滿足不同背景下對飛機目標識別的需求。
  17. The development of the radar echo simulator in the world is introduced, as well as the worldwide usage of the radar echo simulator

    雷達回波模擬器的國內外發展動態，雷達回波模擬器在國內外被廣泛應用。本人的主要工作。
  18. In the first chapter of the thesis, the background of the radar echo simulator is introduced, including the application, basic theory and technology of the radar echo simulator

    本文首先介紹了雷達回波模擬器課題的背景，包括雷達回波模擬器的作用，基本理論和技術特點。
  19. In the third chapter, the hardware design of the radar echo simulator is introduced, including the unitary chart of hardware structure and design of each part in this system, which is composed of designs of computer interface, controlling sdram and controlling ide harddisks and some introduction about d / a and fpgas used in this system

    再次，介紹了本雷達回波模擬器的硬體設計，包括總體硬體結構框圖、系統各部分的硬體設計。系統各部分的硬體設計包括計算機介面設計、大容量高速緩存sdram的控制設計、 ide介面硬盤的控制設計、關于d / a的介紹和本系統使用的fpga的介紹。
  20. The initial field of the model is the in situ observational data. combining the observational data by the doppler weather radar, the distribution and evolution of macro - physical as well as micro - physical variations such as wind field structure, radar echo structure, overhang echo, bound weak echo region, strong echo wall, water content, etc. in the storm were analyzed

    利用中國科學院大氣物理研究所建立的完全彈性三維雹雲數值模式，模擬了1996年6月29日發生在北京東北部京冀交界地區的一次強單體雹暴過程，並結合多普勒雷達探測資料，分析了風暴的流場結構，雷達回波結構特徵，含水量場等宏微觀物理量的分佈及其演變。
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