spaceborne system 中文意思是什麼

spaceborne system 解釋
空載系統
  • spaceborne : 在宇宙空間運行的；由宇宙飛船運載的。
  • system : n 1 體系，系統；分類法；組織；設備，裝置。2 方式；方法；作業方法。3 制度；主義。4 次序，規律。5 ...
  1. 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。
  2. This dissertation mainly researches the displaced phase center antenna ( dpca ) technique in the new system, and the contributions are calculated as following : 1. the doppler history is analyzed for the spaceborne bistatic sar, doppler center frequency and doppler fm rate computational methods are studied. summing up is done for the methods of moving target detection and imaging

    本文完成的主要工作有: 1 .分析慢速運動目標信號特徵以及運動目標對sar成像的影響（多普勒中心頻率，多普勒斜率以及距離徙動誤差） ，總結了目前sar運動目標檢測與成像的主要方法。
  3. For spaceborne sar system with large squint angle, the main error source of classical range - doppler algorithm is analyzed which causes the loss in image quality

    分析了當天線斜視角增大時，導致傳統距離多普勒成像演算法性能下降的主要誤差來源。
  4. The software has been used in many projects such as dual - frequency multi - polarization and multi - modes sar system, environment disaster inspection and forecasting sar satellite etc. this dissertation first considers the geometry relations between spaceborne radar and the earth targets

    該軟體已經在雙頻多極化多模式合成孔徑雷達、環境災害監測預報合成孔徑雷達小衛星等多個項目中得到了應用。
  5. This method offers more precise geometry for spaceborne sar system design and simulation. 3. in the analyzing on the radar doppler properties, under the ellipsoid earth model and ellipse orbit model, considering the earth rotation, the radar doppler properties with different orbit eccentricity are compared, and the fact that orbit eccentricity affects doppler frequency rate is found

    在雷達多普勒特性分析中，論文採用橢球地球模型和橢圓軌道模型，結合地球的自轉，通過不同偏心率下雷達多普勒特性的比較，研究了軌道偏心率對合成孔徑雷達系統設計與模擬軟體研究雷達多普勒調頻斜率的影響。
  6. This dissertation analyzes the detection performance of dpca technique based on distributed spaceborne sar system, particularly analyzes the k - distributed clutter ’ s influence of the detecting results. 4. we compare the detection performance of ground moving target of the ati and dpca technique for the new model of distributed spaceborne sar in detail

    3 .分析了在不同信雜比、信噪比條件下以及不同目標方位向速度對dpca方法檢測性能的影響，特別研究了k分佈背景雜波干擾對動目標檢測性能的影響。
  7. 5. on the aspect of spaceborne sar simulation, after thoroughly analyzing on the representative spaceborne sar simulator, we grasp the spaceborne sar operation procedure, and present a system simulation approach based on radar signal flow

    在星載合成孔徑雷達模擬方面，論文在其它星載雷達模擬方法分析基礎上，把握星載合成孔徑雷達的工作流程，提出了基於雷達實際工作方式的系統模擬方案。
  8. For the high - speed digital signal processing, the structure of fpga and dsp is widespreadly adopted. dsp is more featured in the implementation of complicated algorithm, while field programming gate array ( fpga ) shows more advantage in its flexibility of design, simplicity of system configuration, modification and maintenance. in the paper, the hardware system of the spaceborne radar is based on the structure of fpga and dsp, of which the signal processing part is accomplished with one fpga chip and multi dsps

    Dsp適合完成結構復雜的演算法;現場可編程邏輯陣列（ fpga ）適合完成高效、演算法固定的任務;與專用集成電路（ asic ）相比， fpga優點主要在於其很強的靈活性、可在線配置、修改和維護方便等優點。本文工程中的星載雷達信號處理和控制系統就是採用dsp + fpga的方式。其中信號處理採用的是xilinx公司的virtex -和virtex系列fpga和多片analogdevices公司的tigersharcts101的硬體電路結構。
  9. This dissertation established a novel distributed spaceborne sar simulation system based on the high level architecture ( hla ). this dissertation developed a mathematical model of instantaneous sphere earth model and instantaneous circle orbit model for the geometry system between the satellite platform and the targets on earth based on the satellite platform ’ s orbit features and sar system ’ s operational characteristics, unlike the traditional sphere earth model and circle orbit model

    本文從建立精確的、易於模擬的星地幾何關系入手，舍棄了傳統的星載sar研究中的球型地球模型和圓形軌道模型，根據星載sar的軌道特點和sar的工作特點，對局部球型地球模型進行改進，建立了在瞬時球型地球模型和瞬時圓形軌道模型下的星載sar模擬。
  10. The micro - satellites cooperate together to accomplish one or more tasks, which has equivalent function with a big satellite. the new model system can provide more baseline and contribute to data fusion. it has much more advantage than conventional single spaceborne sar system because its baseline selection is agile and alterable

    由於採用多星協同工作，該系統在保持高解析度情況下可實現寬測繪帶成像、動目標檢測以及地面高程測量等多項任務，並且這種分散式衛星能提供靈活多變的基線組合，可提升系統性能和擴展系統功能，同時提高衛星生存能力、實施規模生產和降低發射費用，具有傳統星載sar無法比擬的優勢。
  11. This dissertation adopts the modularization programming method to develop the spaceborne sar system design and simulation software, which obtains the windows common interface and logical integrated structure, convenient for usage, maintenance and function extension. 2. as for the earth model and orbit model, according to the properties of spaceborne sar operation, in this dissertation, we reject the sphere earth model and circle orbit model and present a novel way to solve spaceborne geometry relations between radar and target by three ellipses, and achieve the way to determine the target position by antenna pointing direction

    在地球模型和軌道模型方面，論文根據星載合成孔徑雷達工作的特點，摒棄了球地球和圓軌道的傳統模型，創新性的採用三個橢圓解決了星載雷達的星地幾何關系問題，得到了在地球橢球模型和橢圓軌道模型下由雷達天線指向確定目標坐標的方法，為星載合成孔徑雷達系統設計與模擬提供了更為精確的幾何基礎。
  12. The spaceborne sar raw data simulator can simulate the echo of the radar, which could be used in the test of the new spaceborne sar system design

    而星載sar分佈目標原始數據模擬可以模擬生成自然地面場景的雷達回波，用於新的星載sar系統的檢驗。
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