The sto , ybco and sto / ybco thin films were deposited on laalo3 ( 001 ) ( lao ) substrate by pulsed laser deposition ( pld ) . the effects of deposition parameters , such as the substrate temperature , the of target - substrate distance , laser energy density , on the properties of the thin fillms were systematically studied . the surface morphology of the thin films was investigated by atomic force microscopy ( afm ) and scanning electron microscopy ( sem ) 采用脉冲激光沉积技术在laalo3 ( 001 ) ( lao )基片上生长ybco 、 sto以及sto / ybco集成薄膜，系统研究了基片温度、基片表面状态、氧分压、激光能量密度、脉冲重复频率等工艺参数对薄膜表面性能、结晶情况的影响，优化了ybco 、 sto薄膜生长的工艺参数，运用afm 、 sem 、 xrd等分析手段表征薄膜的微观性能，分析结果表明：薄膜表面平整、结晶良好、 c轴织构。
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 本文从星载雷达的星地几何关系入手，舍弃传统星载合成孔径雷达研究中的球地球模型和圆轨道模型，研究了在地球椭球模型和椭圆轨道模型下由雷达天线确定目标坐标的方法，并在此基础上研制了星载合成孔径雷达系统设计与模拟软件，完成雷达系统天线尺寸、脉冲重复频率、信号带宽、雷达信号数据率、雷达发射功率、卫星平台的偏航牵引等几个方面的系统参数设计以及雷达多普勒特性、雷达系统模糊、雷达定位及精度的分析，最后完成雷达回波信号的模拟。
The second part brings forward a new ar - model - based arm detection method based on features of arm and characteristics of velocity and acceleration of the radar echoes . by establishing two - order ar models , this new detection method computes the poles of models representing different targets , thus estimates the acceleration of the targets so as to determine the nature of the targets . furthermore , this method can not only be applied when the arm is being tracked by radar , but also be put into use in radar ’ s seeking and scanning times 第二部分则是根据反辐射导弹( arm )的特点及其雷达回波信号中速度、加速度等特征,提出了一种新的基于ar模型的arm检测算法,该方法通过建立二阶ar模型、估计代表不同目标的模型极点,并由此估算目标加速度来判断目标性质,该方法不仅可以在雷达已跟踪上arm后采用,而且适用于雷达搜索扫描时使用,仿真结果表明该方法具有分辨率高,对雷达脉冲重复频率( pulserepetitionfrequency , prf )及积累脉冲数要求不高的特点,在低的prf及少的积累脉冲下,利用该方法仍可有效地识别检测arm 。
