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星敏感器和遥感相机主光轴交联角的在轨检校魏新国;王清龙;李健;赫华颖【期刊名称】《光学精密工程》【年(卷),期】2013(021)002【摘要】为了提高遥感影像产品的定位精度,研究了星敏感器主光轴和遥感相机主光轴交联角的在轨检校方法.利用高分辨率卫星遥感影像的严格成像模型,将改进的非直接求解模型引入到遥感相机安装误差的标定中,提出一种对遥感相机内外方位元素进行统一检校的方法,实现了星上姿态确定系统和遥感相机之间系统误差的精确补偿.对来自遥感卫星的整轨遥感图像进行处理,利用最优化模型确定遥感相机和星敏感器姿态关系矩阵,进而检校出交联角.最后,利用单像对地目标定位原理,对检校精度进行了验证.实验结果表明,校正后地面点经纬度方向平面位置RMS误差分别为9.31m和9.28m,显示通过内外方位元素统一检校,遥感图像的定位精度得到显著提高.【总页数】7页(P274-280)【作者】魏新国;王清龙;李健;赫华颖【作者单位】北京航空航天大学仪器科学与光电工程学院,北京100191;北京航空航天大学仪器科学与光电工程学院,北京100191;北京航空航天大学仪器科学与光电工程学院,北京100191;中国资源卫星应用中心,北京100094【正文语种】中文【中图分类】V448.22;V447.3【相关文献】1.大视场星敏感器矢量观测在轨检校模型 [J], 袁晓波;张超2.基于陆标敏感器对星敏感器在轨标定算法研究 [J], 袁彦红;耿云海;陈雪芹3.针对星敏感器非线性畸变的非参数化在轨检校方法 [J], 润一;王密;程宇峰;董志鹏4.航天星地相机主光轴夹角的在轨动态检测 [J], 王建荣;江振治;等5.惯性敏感器与星敏感器之间在轨自主标定比较研究 [J], 刘一武因版权原因，仅展示原文概要，查看原文内容请购买。
基于多视场星敏感器的三角形星图识别方法熊雪;王庆【期刊名称】《计算机测量与控制》【年(卷),期】2014(22)1【摘要】为解决现有基于单星敏感器的星图识别中由于成像视角小，星图恒星数量不足而造成的星图识别率偏低的问题，提高星图识别的准确度和精确度，提出了一种基于多视场星敏感器的改进三角形星图识别方法；该方法通过将相同位置相同时间不同姿态角获得的多幅星图基于星图自身径向特征拼接成一幅多视角、不失真的星图，利用拼接后的星图进行星图识别，同时采用分块方式存储星对角距以及利用哈希查找提高星图识别效率；实验随机识别500幅星图，仿真结果表明，与传统的单视场星图匹配算法相比，该方法具有更高的星图识别率和匹配精度，当星图恒星数量达到30以上时，平均识别率能基本达到97％，且识别速度提高了11倍左右。
%In order to solve the problem of the low star identification rate of the existing star pattern recognition based on one-FOV star sensor due to the small imaging perspective,the insufficient number of stars,improve the accuracy and precision of star identification,an im-proved triangle star identification method based on multi-FOV star sensor is proposed.The novel method stitches the pieces of star maps obtained in the same position and time but different attitude angle into a piece of star map which is multi-FOV and undistorted,and make use of the star map to complete the star identification.To improve the computation time,the angular of star identification based on block storage and Hash search areused to finish the star identification.500star maps are identified randomly and the simulation results show that compared with the traditional one-FOV star map,the novel algorithm has a higher rate of star identification and higher matching accuracy, the average identification rate can reach 97% when the number of stars are more than 30and identification time also improve 11times faster.【总页数】4页(P225-228)【作者】熊雪;王庆【作者单位】西北工业大学计算机学院，西安710072;西北工业大学计算机学院，西安 710072【正文语种】中文【中图分类】V448.22【相关文献】1.小视场星敏感器的星图识别算法 [J], 孙龙;蔡佳楠;姜建华2.适用于星敏感器的星图识别方法 [J], 陈元枝;郝志航3.基于粗测位置和方位的三视场快速星图识别方法 [J], 王昊京;王建立;吴量;张世学;贾建禄4.基于圆形视场分割的鱼眼相机星图识别方法 [J], 张喆;翟京生;张亮5.三视场星敏感器的多级星图识别算法 [J], 苟斌;程咏梅;赵明艳;王会宾;刘成元因版权原因，仅展示原文概要，查看原文内容请购买。
多探头星敏感器星图融合姿态确定精度熊亚洲;武延鹏;程会艳【摘要】针对多探头星敏感器星图融合姿态确定精度问题做了研究.首先提出多探头星敏感器星图融合方法;其次在此基础上以三个探头为例,推导了三探头星敏感器星图融合姿态确定误差协方差矩阵公式;然后利用协方差椭球对该协方差矩阵的性质做了详细分析,明确了探头间构型、星图融合参考系选择以及各探头星点选取等因素对星图融合姿态确定精度的影响关系;仿真结果表明,最优构型的多探头星敏感器通过星图融合可输出同精度的三轴姿态,并且光轴精度较单探头星敏感器提升了30％.研究成果对多探头星敏感器的工程研制具有理论指导意义.【期刊名称】《中国惯性技术学报》【年(卷),期】2016(024)005【总页数】7页(P612-618)【关键词】多探头星敏感器;星图融合;精度分析;协方差矩阵【作者】熊亚洲;武延鹏;程会艳【作者单位】北京控制工程研究所,北京100190;北京控制工程研究所,北京100190;北京控制工程研究所,北京100190【正文语种】中文【中图分类】V448.2星敏感器是目前各类航天器上精度最高的姿态测量器件[1]，也是天文惯性组合导航系统的关键传感器。
由于工作机理和结构的限制，传统星敏感器存在几个不足：一是其三轴姿态测量精度不一致[2]；二是由于环境杂散光干扰导致无法连续地输出姿态。
目前，航天器上普遍采用安装多个星敏感器的方式来克服上述缺点，该方式通过融合各个星敏感器的姿态来提高三轴姿态确定精度。
但对于高精度姿态确定任务，这种多星敏感器组合模式在轨工作时，多个星敏感器与有效载荷间的安装误差以及各个星敏感器光轴间夹角的变化[3]等因素都严重限制了三轴姿态确定精度，使该方式难以满足更高精度姿态确定任务的需要。
多探头星敏感器利用单处理器处理来自多个探头的图像信息，通过合适的星图融合算法，在获取更高的姿态确定精度、更好的可靠性和更优的动态性能的同时，其成本、重量和功耗并没有显著增加。
工程技术科技创新导报 Science and Technology Innovation Herald75星敏感器是一种高精度的姿态测量装置，以恒星为参照物，利用摄像头探测单元某一时刻对天空直接捕获星图，经过数据处理单元对星图进行恒星质心提取、星图识别、星跟踪、姿态计算等一系列处理，获得星敏感器瞬时视轴指向信息，在航天器上已获得广泛应用[1]。
由于星敏感器具有精度高、低功耗、小尺寸、低成本的特点，其应用领域也逐步扩大。
星敏感器在航天器上应用已经比较成熟，在地面的应用尤其在海上船用星敏感器技术尚有许多问题需要解决：大气折射误差修正、动态拖尾情况下星图的提取与识别等。
近年来，随着大视场高精度星敏感器技术的成熟，将星敏感器安装于无线电雷达等测量设备上，以提高测控设备测角精度成为研究热点[2]。
动态测量精度是衡量星敏感器性能的一个重要指标之一。
该文介绍了星敏感器动态试验系统平台，将星敏感器固定于经纬仪四通上，设定伺服系统等速转动，存储星图及时间码，经纬仪主控软件记录对应的时间码、编码器值，星敏感器通过星点提取、星图识别及姿态解算等一系列数据处理，最后，解算星敏感器的动态测量精度。
1 星敏感器构成及工作原理星敏感器工作原理图如图1所示，其中光学系统用于获取天空星图，星图处理模块完成星图预处理、亚像元细分定位、对星图进行恒星质心的提取、星图识别以及星图跟踪等一系列计算，导航解算模块计算星敏感器光轴在地心惯性空间的瞬时指向，再经坐标变换后确定载体的位置和姿态信息。
星敏感器以恒星发出的微弱星光信号为探测目标。
由于星光信号较微弱，所以对星敏感器采用的图像探测器灵敏度提出了很高要求。
早期主要采用长焦距、小视场的光学系统，探测星等较高。
随着技术的进步，一些高灵敏度的探测器件不断出现，使星敏感器可以采用视场相对较大、焦距相对较短的光学系统，同时也缩短了拍摄星图的积分时间，提高了数据更新速率，所以目前探测器一般选取灵敏度较高的E M C C D。
星敏感器精度测试论文【摘要】为了在实际星空条件下，精确测定星敏感器的精度，提出利用陀螺加速度计数据与卡尔曼滤波算法，使星敏感器与地理坐标系精确对准，根据星敏感器定姿原理，将测试时刻实际数据与理论输出比对，实测值表明，此方法测得数值，具有更加令人信服的工程实际价值。
【关键词】星敏感器精度评估初始对准经纬仪卡尔曼滤波1 引言星敏感器的测角精度在几个角秒到几十个角秒不等，传统的方法主要依赖于高精度的模拟器，但是模拟器毕竟只是模拟输入，与真实星空不尽相同，测试数据也定与真实数据较有更大的差距。
本文在利用经纬仪准直法保证陀螺、加表与星敏感器三轴平行安装的情况下，利用卡尔曼滤波算法实现北东地地理坐标系与星敏感器测量坐标系对准，通过坐标变换把星敏感器实测数据与理论数据转换到同一坐标系下，从而实现在实际星空下对星敏感器精度的评估。
2 星敏感器测量坐标系与地理坐标系固连将星敏感器固定在地球上，那么星敏感器则随着地球转动，只要将星敏感器的测量坐标系与地理坐标系精确固连，根据坐标系转换则可以实现对星敏感器测角精度的评估。
所谓的精确固连，就是精确确定星敏感器测量坐标系与地理坐标系的转换矩阵，或者利用某种手段使星敏感器测量坐标系与地理坐标系精确对准，而现有的对准技术主要依赖于陀螺和加表，那么只要陀螺和加表与星敏感器平台安装，且实现陀螺加表的测量坐标系与星敏感器测量坐标系的精确标定，星敏感器测量坐标系与地理坐标系的对准问题就转化为陀螺和加表测量系与地理坐标系的对准问题，而陀螺和加表与地理坐标系的对准问题可以利用成熟的卡尔曼滤波算法实现，通过经纬仪布站方法可以实现陀螺加表坐标系与星敏测量坐标系转换矩阵的标定。
2.1 陀螺加表测量坐标系与星敏感器测量坐标系转换矩阵的确定通过精加工安装支架可以实现星敏感器与陀螺加表测量坐标系指向相同，实际安装时无法做到转换矩阵是绝对的单位阵，这就需要用经纬仪布站的方法测量转换矩阵，需要4台经纬仪，记为T1、T2、T3、T4，实际测量时，T1、T2与星敏感器立方晶自准直建立星敏感器测量坐标系，用同样方法通过T3，T4建立惯测组合测量坐标系，再通过T1、T3互瞄可以得到陀螺加表测量坐标系与星敏感器测量坐标系的的转换关系，近似于单位阵。
专利名称：一种基于生物复眼结构的一体化星敏感器及其应用专利类型：发明专利
发明人：张仁斌,高隽,李钢
申请号：CN200810246224.5
申请日：20081231
公开号：CN101451844A
公开日：
20090610
专利内容由知识产权出版社提供
摘要：一种基于生物复眼结构的一体化星敏感器及其应用，其特征是设置星敏感器为基于生物复眼结构的多视场星敏感器，以小视场的光电成像系统构成各自独立的小眼，由多个小眼形成大视场星敏感器；光电成像系统中的光学透镜与图像敏感器CCD/APS之间的光通道为圆台孔；在所述大视场星敏感器中，小眼分布在半圆柱表面或半球表面，且小眼光轴与圆柱轴线正交或经过球心；相邻小眼的视场不重叠。
本发明利用多个独立的高空间分辨率的小视场实现大视场，摄取更多恒星，大幅度增大θ，实现同时从n和θ两个方面提高星敏感器的精度。
申请人：合肥工业大学
地址：230009 安徽省合肥市屯溪路193号
国籍：CN
代理机构：安徽省合肥新安专利代理有限责任公司
代理人：何梅生
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I 《航天返回与遥感》第40卷（2019）总目次第1期升力体再入飞行器离轨制动方案及优化研究 ··························· 左光, 陈鑫, 侯砚泽, 吴文瑞 (1) 高空零压气球上升过程的运动特性研究 ············································· 廖俊, 袁俊杰, 蒋祎, 杨泽川, 李珺, 卢智勇, 吴春晖, 王宁 (11) 基于FPGA的星上影像正射纠正 ···························· 张荣庭, 周国清, 周祥, 刘德全, 黄景金 (20) 基于改进型重复控制的光程扫描控制系统设计 ················ 郭兰杰, 王浩, 王淳, 马文坡, 林喆 (32) 基于月球观测的“高分四号”卫星相机在轨MTF测试 ·············· 吴同舟, 王浩, 周峰, 李晓曼 (41) 亚微米像元器件在空间应用中的光学系统设计 ························································ 胡嘉宁, 王小勇, 阮宁娟, 刘晓林, 庄绪霞, 李妥妥 (50) 五棱镜垂直度误差对转向角的影响分析 ·········································· 温中凯, 雷文平, 黄颖 (59) “高分三号”卫星图像干涉测量试验 ···································· 余博, 李如仁, 陈振炜, 张过 (66) “高分四号”卫星正射校正精度分析 ···································· 马冯, 孙旭, 高连如, 付晨罡 (74) 基于改进的切比雪夫多项式轨道的SAR影像正射纠正 ································································· 周国清, 贺朝双, 岳涛, 沈俊, 黄煜, 李晓柱 (83) 应急遥感影像信息快速提取方法探讨 ························································ 刘嘉, 廖小露 (93) 一种面向对象的机场跑道变化检测方法 ····················································· 张艺明, 肖文 (102) 旋转森林算法在GF-2卫星影像土地利用分类中的应用·············· 彭力恒, 刘凯, 朱远辉, 柳林 (112) 第2期平流层飞行器技术的最新发展 ··················································· 王彦广, 王伟志, 黄灿林 (1) 充气式进入减速技术的发展 ······························································· 黄伟, 曹旭, 张章 (14) 再入返回器极端热载荷预测方法 ············································· 张思宇, 余莉, 曹旭, 张章 (25) 气动热作用下的充气式减速器性能研究 ······································· 王帅, 余莉, 张章, 曹旭 (33) 骨架充气压力对自充式气囊缓冲性能影响研究 ····················· 李博, 竺梅芳, 牛国永, 刘兴华 (43)II孙嘉, 黄伟, 卢齐跃 (51) 临近空间飞行器滑橇式起落架缓冲特性分析 ···································· 璘多点平衡支撑在空间大口径反射镜上的应用 ························ 张博文, 王小勇, 郭崇岭, 刘湃 (60) 一种航天相机微纳镜头的实现方法 ································· 安书兵, 练敏隆, 唐绍凡, 李瀛搏 (69) 基于行数据扫描的星空多目标星点提取方法 ··························· 李寅龙, 何海燕, 张凤, 李婧 (79) 一种新的连续面形变形镜的解耦控制方法 ······················································ 刘成, 于飞, 丁琳, 宋莉, 黄刚, 郝中洋, 李超, 林喆 (89) ULE®叠层反射镜二维等效建模方法研究 ················································· 丁锴铖, 连华东 (99) GF-6卫星WFV数据在林地类型监测中的应用潜力 ··································································· 刘晋阳, 辛存林, 武红敢, 曾庆伟, 史京京 (107) 第3期前沿光学技术的新发展 ·················································································· 金国藩 (1) 航天火工装置点火输出压力散差的精细化控制 ··························· 成琦, 王帅, 胡建举, 杨叶 (5) 小天体探测器着陆附着技术研究 ················································ 王立武, 戈嗣诚, 蒋万松 (14) 减速伞收口状态气动特性仿真与试验研究 ··········· 王奇, 王立武, 张章, 吴卓, 雷江利, 孙希昀 (24) 大口径光学组件重力翻转测试方法验证及应用 ······· 周于鸣, 杨秋实, 孟晓辉, 刘志远, 王向东 (33) 面向航天应用的高可靠性FPGA动态局部重构 ············· 于志成, 庄树峰, 刘涛, 王洋, 杨秉新 (40) FTS干涉信号延时补偿算法的仿真分析··········································· 翟茂林, 李涛, 张玉贵 (47) 静止轨道闪电光学探测的光谱选择及影响分析 ·········· 鲍书龙, 陈强, 张志清, 汤天瑾, 赵学敏 (57) 空间光学遥感器反射镜组件中环氧胶的选用 ···································· 周小华, 邢辉, 杨居奎 (65) 大气色散对航空双谱段高分辨率斜视成像影响 ·················· 张绪国, 尚志鸣, 张跃东, 曹桂丽 (73) 基于扩展卡尔曼滤波的星敏感器在轨几何标定 ··················· 李响, 谢俊峰, 莫凡, 朱红, 金杰 (82) “委遥二号”卫星长波红外通道在轨辐射定标 ··························································· 刘莉, 陈林, 徐寒列, 胡秀清, 张正慧, 汪红强 (94) 岫岩偏岭矿区植被修复生态环境监测评估 ·············· 周斌, 李雨鸿, 李辑, 李晶, 王婷, 刘东明 (103) 基于本征图像分解的高光谱图像空谱联合分类 ········································· 任智伟, 吴玲达 (111)III 第4期大型航天器无控再入气动稳定性分析 ······································· 徐艺哲, 万千, 左光, 石泳 (1) 空间重复锁紧技术综述 ················ 杨泽川, 罗汝斌, 廖鹤, 廖俊, 罗世彬, 蒋祎, 袁俊杰, 王宁 (10) 降落伞收口绳载荷计算方法研究 ··········································· 王立武, 雷江利, 吴卓, 包进进 (22) 面向降落伞稳态CFD计算的网格生成方法研究 ··············· 靳宏宇, 吴壮志, 王奇, 贾贺, 荣伟 (30) 环路热管在低温真空环境下的控温性能试验研究 ············· 高腾, 杨涛, 鲁盼, 赵石磊, 赵振明 (38) 基于FPGA的探测器制冷控制系统优化设计 ············································ 谢妮慧, 郝中洋 (48) 开环虚拟振动试验方法在航天遥感器上的应用研究 ································· 郭崇岭, 张博文, 赵野 (57) 垂直装调用大口径自准直反射镜系统研究 ·········································· 陈宗, 范龙飞, 李斌, 陆玉婷, 王昀, 李凌, 陈佳夷, 王向东 (67) 一种高精度半角反射镜指向机构的设计与实现 ···································· 李晓, 于婷婷, 王淳 (76) 基于FFT算法的激光有源非稳腔光场分布数值计算方法 ············································· 罗萍萍, 桑思晗, 史文宗, 杨超, 颜凡江, 李梦龙, 蒙裴贝 (86) 光学遥感图像目标检测技术综述 ························· 李晓斌, 江碧涛, 杨渊博, 傅雨泽, 岳文振 (95) 基于非负最小二乘法的全色与高光谱图像融合 ······························ 郝红勋, 何红艳, 张炳先 (105) 顾及光行差改正的遥感卫星成像模型及验证 ····················· 张宏伟, 张炳先, 侯作勋, 彭呈祥 (112) 复杂山区ASTER GDEM2高程精度验证 ············································ 胡勇, 马泽忠, 黄健 (122) 第5期计算成像——全光视觉信息的设计获取 ·················································· 赵巨峰, 崔光茫 (1)武 (15) 美军气象卫星的应用与管理 ······························································· 刘韬, 王丹, 珺航天器可重复使用热防护技术研究进展与应用 ········································· 周印佳, 张志贤 (27) 基于主动排气气囊的着陆缓冲控制系统FPGA设计 ··························································· 孙希昀, 王立武, 张章, 刘靖雷, 邓黎, 雷江利 (41) CCD连续转移下图像串扰问题的研究····················申才立, 梁楠, 李鑫, 龚敬, 韩志学, 董龙 (50) 随机振动引起空间反射镜面形退化的机理研究 ·········· 孔富家, 白绍竣, 陈祥, 刘义良, 乔玉莉 (58) 一种调焦机构运动方向与光轴平行性测试方法 ····················· 魏鑫, 何鸿涛, 王建永, 穆生博 (67)IV星载TDI光机扫描相机偏流角建模 ···································· 王浩, 郭兰杰, 晋利兵, 赵艳华 (75) 星载光子探测激光雷达指向调整机构的理论分析 ····················· 张晨阳, 王春辉, 战蓝, 齐明 (84) 基于RFM模型的叠掩区域定位方法······································ 程前, 王华斌, 汪韬阳, 李玉 (95) 基于双树复小波分解的云量时间序列模型预测 ······· 白云博, 欧阳斯达, 杨朦朦, 夏学齐, 王婷 (106) 物方反投影下的星载多光谱相机内视场虚拟线阵拼接···················王怀, 莫凡, 李奇峻, 王鄂 (118) 第6期半刚性机械展开式气动减速技术机构与热防护研究 ································································ 张鹏, 苏南, 赵铄, 桂蜀旺, 毛科铸, 侯向阳 (1) 基于大气模型误差特性的“天宫一号”再入预报 ····················· 张炜, 王秀红, 崔文, 游经纬 (11) 深空探测器防热承力一体化大底结构研究 ··································· 黄文宣, 邱慧, 刘峰, 张萃 (19) 超声速透气降落伞系统的气动干扰数值模拟研究 ············· 贾贺, 姜璐璐, 薛晓鹏, 荣伟, 王奇 (26) RNN在降落伞开伞特性研究中的应用 ················································ 姜添, 戈嗣诚, 李健 (35) 基于主动光学的大型空间相机像质校正仿真············· 赵号, 苏云, 张丽莎, 李博, 粘伟, 张博文 (44)空间红外推扫成像系统探测器光学拼接方法 ············································ 邱民朴, 马文坡 (51)基于不同成核层的碳化硅基底反射镜特性研究 ··························································何世昆, 白云立, 周于鸣, 张继友, 黄巧林, 王利 (59)红外甚高光谱分辨率探测仪反演系统的设计与实现 ··························································罗琪, 李小英, 程天海, 张兴赢, 葛曙乐, 张玉贵 (67)“巴遥一号”卫星双相机在轨绝对辐射定标及精度分析 ········································· 李岩, 陈洪耀, 方舟, 李龙飞, 陈元伟, 胡永力, 汪红强, 汪松 (77)基于滑坡区域颜色特征模型的SVM遥感检测························ 陈善静, 康青, 沈志强, 周若冲 (89)基于U-net的“高分五号”卫星高光谱图像土地类型分类 ························································ 孙晓敏, 郑利娟, 吴军, 陈前, 徐崇斌, 马杨, 陈震 (99)基于深度学习特征提取的遥感影像配准 ·················································· 许东丽, 胡忠正 (107)（卷终）VSpacecraft Recovery & Remote SensingVol. 40 (2019)ContentsNo.1Deorbit Study of General Scheme & Optimized Design of Lifting Reentry Vehicle ································································ ZUO Guang, CHEN Xin, HOU Yanze, WU Wenrui (1) Motion Characteristics of Zero-pressure Balloon in Ascending Process·· LIAO Jun, YUAN Junjie, JIAGN Yi, YANG Zechuan, LI Jun, LU Zhiyong, WU Chunhui, WANG Ning (11) Ortho-rectification for Remote Sensing Image Using FPGA ··························· ZHANG Rongting, ZHOU Guoqing, ZHOU Xiang, LIU Dequan, HUANG Jingjin (20) Optical Path Scanning Control System Based on Modified Repetitive Control ················································· GUO Lanjie, WANG Hao, WANG Chun, MA Wenpo, LIN Zhe (32) The Lunar Trail of GF-4 Satellite and On-orbit Knife-edge Measurements of MTF ······························································ W U Tongzhou, WANG Hao, ZHOU Feng, LI Xiaoman (41) Study on Submicron Pixel Size Detector Applied in the Space Optical System Design ················ HU Jianing, WANG Xiaoyong, RUAN Ningjuan, LIU Xiaolin, ZHUANG Xuxia, LI Tuotuo (50) Impact Analysis of the Perpendicular Error of Pentaprism on the Steering Angle ······································································ WEN Zhongkai, LEI Wenping, HUANG Ying (59) Image Interferometry Experiment of GF-3 Satellite ·································································· YU Bo, LI Ruren, CHEN Zhenwei, ZHANG Guo (66) Research on Orthorectification Accuracy of GF-4 Satellite Image 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MA Feng, SUN Xu, GAO Lianru, FU Chengang (74) Orthorectification of SAR Image Based on Improved Chebyshev Polynomials Orbit Model ··························· ZHOU Guoqing, HE Chaoshuang, YUE Tao, SHEN Jun, HUANG Yu, LI Xiaozhu (83) Discussion on Rapid Extraction Method of Emergency Remote Sensing Image Information ·································································································· LIU Jia, LIAO Xiaolu (93) An Object-oriented Method for Airport Runway Change Detection ................... ZHANG Yiming, XIAO Wen (102) GF-2 Satellite Imagery Application in Land Use Classification Based on Rotation Forest Algorithm ··································································· P ENG Liheng, LIU Kai, ZHU Yuanhui, LIU Lin (112)No.2The Latest Development of Stratospheric Aerocraft Technology ······························································WANG Yanguang,WANG Weizhi, HUANG Canlin (1) The Development of Inflatable Entry Decelerator Technology ...... 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