光学遥感卫星总体参数优化设计概念研究

结合传统卫星总体设计和现代优化设计方法 ,提出卫星总体优化设计流程。首先明确任务目标和任务要求 ,然后用模糊多目标优选方法进行总体方案类型优选 ,最后确定了卫星总体参数优化设计的设计变量、约束条件和目标函数 ,并且建立起成本、性能、费效比、可靠性和多目标的优化模型。最后 ,对四个单目标优化和多目标优化的结果进行了比较     

卫星图象按块分频压缩法

针对星载实时压缩的需要，设计了一种按块分频压缩算法。该算法以按块定长压缩为基础。用二级拟合修正，与高频纹理特征修正相结合的方式恢复原图象信息，得到了四倍压缩比下，有限误码扩散及较好的图象保真效果。     

Radar detection of subsurface features on Mars

The structure of the pulse radar signal reflected from continuously changing layered Martian crust is investigated theoretically. As a simple model of stratigraphy, we considered one layer with electrodynamics’ parameters increasing or decreasing exponentially upon a depth laying on monolith base and covered by homogeneous layer. This exponential changing of electromagnetic properties of the layer is assumed due to exponential changing of porosity (or saturation) in the bedrocks with pores filled by seawater. The conditions of subsurface features resolution are obtained. It is shown that the sign and value for gradient of the electromagnetic properties change can be resolved from the reflection peaks trend. These results are important for subsurface detection of liquid water on Mars by orbit-based radars.     

航天光学遥感器MTF测试技术研究

调制传递函数（MTF）是航天光学遥感器重要的性能指标之一，MTF的测试是航天光学遥感器研制以及在轨运行性能监测的重要方面。文章对航天光学遥感器MTF测试方法进行理论分析，比较各种测试方法存在的优缺点。     

CBERS-1卫星星载太阳定标器的研制

文章介绍了CBERS_1卫星IRMSS太阳定标器的主要技术指标要求和工作原理 ,并阐述太阳定标器的设计 ,包括光学设计、机械设计和电学设计等。     

星载微波湿度探测仪初探

讨论了星载微波湿度探测仪工作频率的选择，介绍了国外的研究两头探讨了星载微波湿度探测仪的设计方案，提出了短毫米波和亚毫米波低噪声接收技术是研制这类探测仪的技术关键。最后指出，根据我国上前的技术水平，研制短毫米波的星载微波大气温度探测仪是可行的。     

Comparison of the CHAMP radio occultation data with the Canadian advanced digital ionosonde in the Polar Regions

In this paper we present the results of the comparison of the retrieved electron density profiles of the Ionospheric Radio Occultation (IRO) experiment on board CHAMP (CHAllenging Minisatellite Payload), with the ground ionosonde profiles for the Polar Regions. IRO retrieved electron density profiles from CHAMP are compared with Canadian Advanced Digital Ionosonde (CADI) measurements at two vertical sounding stations well within the Polar Cap, Eureka (geog. 80°13′ N; 86°11′ W) and Resolute Bay (geog. 74°41′ N; 94°54′ W). We compared the ionospheric parameters such as the peak electron density of the F-layer (NmF₂) and the peak height of the F-layer (h_mF₂) for a 3-year period, 2004–2006. CHAMP derived NmF₂ shows reasonable agreement with the ionosonde retrieved NmF₂ for both the stations (0.76 and 0.71 correlation coefficient, for Eureka and Resolute Bay, respectively) whereas the h_mF₂ agreement is not that acceptable (0.25 and 0.37 correlation coefficient, respectively). The h_mF₂ from vertical sounding showed less spread than the CHAMP h_mF₂.     

用于制备量子遥感压缩光源的模清洁器的设计

压缩态光场是量子遥感成像实验中使用的光源，制备该光源的过程中需要一个窄线宽的模清洁器改善激光的光束横模质量和过滤高频噪声。文章对模清洁器抑制高阶模的原理进行了研究，根据实验需求设计了三镜环形腔结构的模清洁器基本参数，设计中兼顾了窄线宽与透过效率两方面要求，线宽为1.4MHz，透过效率为60%。通过仿真优化了模清洁器对高阶模的抑制效果，最终设计的模清洁器对高阶模的抑制度大于12dB，将用于795nm量子遥感成像实验中。     

光学遥感图像船只目标检测识别技术

船只目标检测识别技术是现阶段遥感图像研究领域的一个重要发展方向。随着国产高分辨率卫星的快速发展，高分遥感卫星陆续发射，基于光学遥感图像的船只检测识别技术会逐步成为研究热门。主要介绍了近年来基于光学图片的船只检测识别技术发展、以及当前技术存在的问题。当前基于深度学习的船只目标检测识别技术取得了较好的检测效果，成为主流研究方向，但在光学遥感图像船只检测领域基于深度学习的方法有一些基本问题限制了检测效果，对这些问题进行了归纳总结，并对未来光学遥感图像船只检测技术的发展进行了展望。