| 1. | Airborne sar imaging experiments for improving azimuth resolution
改善机载雷达方位聚焦的成像处理试验研究 |
| 2. | Spotlight mode sar is an important imaging mode of sar , which can obtain high azimuth resolution that might be hardly obtained by the conventional stripmap sar
聚束式合成孔径雷达是sar的一种高分辨率成像模式，它可获得传统条带sar无法达到的高方位分辨率。 |
| 3. | The spotlight mode sar provides the opportunity to collect sar data over a wide azimuth angular interval ( independent of antenna azimuth beamwidth ) with the potential for extremely fine azimuth resolution
聚束模式合成孔径雷达( syntheticapertureradar , sar )是一种具有极高分辨率的雷达系统。 |
| 4. | Presently , the study of targets imaging focuses on 2d imaging and the main objective is to enhance the azimuth resolution via synthetic aperture imaging method
目标成像可以获得对目标直观的认识,目前,目标成像研究主要集中在对目标b - scan数据进行二维成像以及旨在提高方位分辨率的合成孔径成像上。 |
| 5. | First , we go over the basic theory of sar making a theoretical preparation for following chapters , introducing the principle of sar , range and azimuth resolution , range migration , principle of the stationary phase
本文首先回顾了机载合成孔径雷达的一些基本问题,介绍了合成孔径雷达的基本原理、距离向和方位向分辨率、距离徙动、驻定相位原理等为后续章节做了理论上的铺垫。 |
| 6. | Sthe azimuth resolution characteristics for different deployments of the antennae ’ irradiation mode is discussed clearly through analyzing the doppler history of the echoed signal based on the platforms " motion features and antennae " irradiation rules
根据收、发载机平台的运动特点和天线波束在观测场景平面内的照射规律,本文采用多普勒频率分析的方法详细讨论了发射、接收天线采用不同照射配置方式时系统的方位向分辨特性。 |
| 7. | Synthetic aperture radar ( sar ) is an active microwave remote sensor , which has the high azimuth resolution by using the theorem of synthetic aperture . because of its widely application in military and civilian synthetic aperture radar has received more and more recognition
合成孔径雷达是主动式微波成像雷达,是利用信号处理技术以小的真实孔径天线达到高分辨率成像的雷达系统,由于其在民用和军事方面的应用,越来越受到广泛的关注。 |
| 8. | With the development of sar imaging technique and the improvement of sar imaging quality , high range and azimuth resolution has come true . as a result , sar has been an important tool for scientific research and remote sensing . it will take on a supreme future in both military and civil
随着sar成像处理技术的发展，其成像质量不断提高，它成为当今高科技条件下一种不可取代的探测、侦察手段，在军事、经济和科学研究等方面都有重大价值和广泛应用前景。 |
| 9. | 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
在简要介绍了合成孔径雷达的成像原理后，本文着重从原理方面对双站sar进行了分析，讨论双站sar的方位向分辨率，测绘带宽，聚焦深度，脉冲重复频率限制，雷达方程等问题，然后对发射机固定的双站sar这种特殊的双站sar模式进行分析。 |
| 10. | A important conclusion is verified from these analysis that although the azimuth resolution of sar radar is theoretically not connected with parameters such as radar range and center frequency , in fact , on the condition of same resolution , when the range becomes further and center frequency become lower , the requirement for the radar power gain production , signal processing and precision of ins will be higher , therefore the imaging will become more difficult
同时也证明了一个重要的结论：从理论上讲，合成孔径成像的方位分辨率与作用距离、雷达工作频率等参数无关，但实际上，在分辨率保持不变的情况下，随着作用距离的提高，工作频率的下降，对雷达的功率孔径积、信号处理以及惯导精度的要求会越来越高，从而成像也会变得越来越困难。 |
