资源三号卫星廊坊地区遥感数据的融合处理

本文以资源三号卫星河北省廊坊地区2A级全色遥感影像和多光谱影像数据为基础,采用遥感数字图像处理软件ERDASIMAGINE进行了研究区域的提取,并对提取的感兴趣区进行了几何校正,即图像配准处理,然后进行了融合处理,分别采用了空间增强的分辨率融合算法、改进IHS分辨率融合算法以及小波分辨率融合算法,通过和融合前的影像进行对比,融合后的影像既保留了多光谱影像的丰富的波谱信息,同时具有了全色影像的高空间分辨率的特征,最后对比三种融合算法,得出改进的IHS分辨率融合算法效果最佳。     

遥感卫星扰振对TDICCD相机图像影响的仿真与分析

随着传输型遥感卫星结构的扩大化及灵活性的增强,对图像品质产生影响的扰振越来越受到重视。当遥感卫星在轨进行成像时,相机的图像品质会由于星上活动部件的运动的影响而下降。文章从调制传递函数（Modulation Transfen Function,MTF）角度出发,对不同工况下太阳翼转动驱动机构（BAPTA）和动量轮对图像品质的影响进行了仿真和评估。同时,针对高分辨率相机成像品质影响,从动力学仿真方面对星体扰振的幅值和频率进行了有限元分析,确定了扰振源的频率和幅值。最后,根据仿真分析结果,提出了星上扰振控制方案建议。     

一种遥感图像建筑物检测新方法

遥感图像中的建筑物检测对于土地规划和地图绘制等具有重要意义。文章针对高分辨率全色遥感图像植被覆盖中隐蔽建筑物检测问题,提出了一种结合屋顶结构信息和纹理信息的快速房屋检测方法。首先利用屋顶边缘的几何关系寻找具有矩形屋顶的建筑物;然后使用形态学方法提取屋顶较亮的建筑物;最后利用局部二值模式（Local Binary Pattern,LBP）描述屋顶的纹理特征,并利用支持向量机（Support Vector Machine,SVM）排除误检区域。通过在全色遥感图像集上的试验证明,所提方法对高分辨率遥感图像植被覆盖区域中的建筑物目标具有较高检测率和较低误检率。     

基于MATLAB/Simulink的HY-2星载微波散射计系统仿真建模

为实现星载微波散射计的优化设计,利用MATLAB软件搭建了海洋二号(HY-2)卫星微波散射计系统仿真模型。首先,参考其初样设计阶段的仿真模型,根据其最终设计方案和参数设置,对发射机、接收机、信号处理单元三个主要模块搭建仿真模型。其次,模拟海面风场监测过程,将仿真模型划分为信号源、发射机、海面回波、接收机、信号处理单元和结果输出六部分,并在初样设计模型的基础上引入信道特性,完善仿真模型。最后,利用雷达方程解算海面后向散射系数,验证了模型的正确性,可为我国后续微波散射计的设计和优化提供仿真分析手段。     

基于DCT-CS的脉冲星周期超快速估计方法

受快速傅里叶变换（fast Fourier transform，FFT）的影响，基于FFT和压缩感知（compressive sensing, CS）的脉冲星周期快速估计算法的计算量大。为进一步减小计算量并提高计算精度，利用离散余弦变换（discrete cosine transform，DCT)取代FFT，提出了一种基于DCT-CS的脉冲星周期超快速估计算法。在该方法中，利用DCT提取脉冲星信号的低频部分构建低频DCT矩阵；构建畸变轮廓字典并获取累积轮廓；提出了利用最大值超分辨率稀疏恢复估计脉冲星周期的方法。仿真结果表明，DCT-CS的脉冲星周期估计精度达到了3.82×10-12 s，计算时间达到了9.31 ms。与FFT-CS相比，周期估计精度提高了约16%，计算时间缩短了约37.5%，实现了实时高精度的脉冲星周期估计。     

月球探测器软着陆缓冲机构触月敏感技术

简介了国外月球和火星等探测器软着陆缓冲机构＂触地＂敏感技术与应用,提出了采用冲击加速度检测的探测器软着陆缓冲机构（足垫）触月敏感触发方案,阐述了敏感触发装置的设计思想,分析了探测器软着陆触月过程的动力学响应,论述了触发装置的冲击加速度敏感检测方式与原理以及电路单元设计。该装置比较适合月球探测器软着陆缓冲机构的结构和工作特点,可以满足制导、导航与控制（GNC）主控系统设计要求。     

Detrend effect on the scalograms of GPS power scintillation

The study of amplitude scintillation on GPS radio links is usually done after detrending the time series of the transmitted power so to define scintillations as the chaotic fluctuation around a unitary value. In a sense, the choice of how to detrend the time series is part of the definition of scintillation.     

Distribution of chlorophyll and harmful algal blooms (HABs): A review on space based studies in the coastal environments of Chinese marginal seas

Monitoring of spatial and temporal distribution of chlorophyll (Chl-a) concentrations in the aquatic milieu is always challenging and often interesting. However, the recent advancements in satellite digital data play a significant role in providing outstanding results for the marine environmental investigations. The present paper is aimed to review ‘remote sensing research in Chinese seas’ within the period of 24 years from 1978 to 2002. Owing to generalized distributional pattern, the Chl-a concentrations are recognized high towards northern Chinese seas than the southern. Moreover, the coastal waters, estuaries, and upwelling zones always exhibit relatively high Chl-a concentrations compared with offshore waters. On the basis of marine Chl-a estimates obtained from satellite and other field measured environmental parameters, we have further discussed on the applications of satellite remote sensing in the fields of harmful algal blooms (HABs), primary production and physical oceanographic currents of the regional seas. Concerned with studies of HABs, satellite remote sensing proved more advantageous than any other conventional methods for large-scale applications. Probably, it may be the only source of authentic information responsible for the evaluation of new research methodologies to detect HABs. At present, studies using remote sensing methods are mostly confined to observe algal bloom occurrences, hence, it is essential to coordinate the mechanism of marine ecological and oceanographic dynamic processes of HABs using satellite remote sensing data with in situ measurements of marine environmental parameters. The satellite remote sensing on marine environment and HABs is believed to have a great improvement with popular application of technology.     

SPOT-5卫星系统性能概述

概要介绍SPOT - 5卫星的主要成像传感器 ,精确定位技术及数据格式。介绍分析卫星数据的应用前景     

The land remote sensing commercialization Act of 1984

This article examines the effect that private-sector remote sensing activities might have on the international community and on the future of international cooperation in space. It describes in detail The Land Remote Sensing Commercialization Act of 1984, recently passed by the US Congress and signed by President Reagan. The article concludes that it is possible to develop domestic regulations that balance the economic interests of the private sector with the legal and political concerns of the international community.