Progress in the Development of a High Performance Airborne Digital Sensor   总被引：1，自引：0，他引：1  

P. Fricker  R. Sandau  & A. S. Walker 《The Photogrammetric Record》2000,16(96):911-926

Joint development work by LH Systems and Deutsches Zentrum für Luft- und Raumfahrt (German Aerospace Center) has produced encouraging results using forward, nadir and backward looking linear arrays on the focal plane to provide panchromatic imagery and geometric information, supplemented by further arrays to acquire multispectral imagery suitable for both high precision photogrammetric mapping and image processing for interpretative purposes. The geometric characteristics of line scanner imagery necessitate line-by-line rectification for aircraft tilts and shifts. Satisfactory execution of this process is enhanced by using supplementary data from high performance, on-board GPS and inertial measurement systems. Similarly, high demands are placed on other sub-systems, such as the camera mount, lens, electronics and storage technology. In addition to rectification for aircraft tilts and shifts, rectification for terrain characteristics is also required in order to generate colour and false colour composite images, since the various multispectral arrays are in different places on the focal plane. The special geometry affects triangulation. Thereafter, the imagery can be processed using existing software packages from both photogrammetry and remote sensing.
The concept has been demonstrated in several successful test flights and the production model is scheduled for market introduction at the ISPRS Congress in July 2000. The imagery from the new sensor will fulfil many market requirements between the highest resolution film imagery (<0.1 m) and high resolution space imagery (1m to 10 m). The sensor's unique blend of multispectral information with high quality geometric information will give rise to numerous new applications.  相似文献   

正交各向异性岩体孔径变形法的二维地应力分析方法改进     

韩昌瑞  白世伟  张波 《岩土力学》2007,28(11):2249-2253

根据正交各项异性材料的弹性理论,推导出偏轴坐标系下的三维、二维本构方程;利用应力变分法对钻孔周围的应力分布作出修正,进一步得出孔壁径向位移的计算公式。结合孔径变形法测量地应力的特点,建立正交各向异性岩体地应力的分析理论,通过一典型工程与传统的各向同性理论进行了对比。  相似文献   

加筋垫层土工织物中应力现场测试分析     

闫澍旺  王翠  于志强 《岩土力学》2007,28(Z1):873-876

如何测定加筋垫层中土工织物中的应力,对于研究土工织物的加筋效果是非常重要的,也是目前工程中急待解决的问题,也是非常困难的课题。结合实际工程,介绍了某防波堤土工织物加筋垫层现场应力测试中的仪器布置、埋设方法和测试结果。分析防波堤堤基土工织物拉应力分布大小、特点以及与堤底地基的沉降关系。实测结果表明,拉应力发挥水平远低于设计拉力值,这对土工织物加筋垫层稳定分析中如何考虑拉应力大小提出了新的问题。  相似文献   

风应力的实验室测量方法研究     

纪文君  蒋东辉 《热带海洋学报》2000,19(4):71-76

介绍了风应力的传统测量方法 ,指出其缺点是误差较大。提出了一种在实验室测量风应力的新方法———倾斜水面法 ,并在实验中加以比较验证 ,证明了此种方法的可行性。其精度更高 ,且具有操作方便、容易观测的特点。  相似文献   

Reticon探测器用于位置监测的信号处理方法和精度分析     

彭青玉 《天文研究与技术》2000,(1)

利用低纬子午环上配备的Reticon探测器的输出信号 ,采用重心方法和互相关分析方法分析测定了Reticon用于位置监测的精度。结果表明 :在仪器系统保持稳定的情况下 ,Reticon监测位置变化的精度优于± 0 .0 1像素 (单次测定的标准误差 )。  相似文献   

Statistical applications to second-rank tensors in magnetic fabric analysis     

W. H. Owens 《Geophysical Journal International》2000,142(2):527-538

  相似文献   

城市活动断裂带的土壤氡、汞气评价方法   总被引：7，自引：0，他引：7  

刘菁华  王祝文  刘树田  王晓丽 《吉林大学学报(地球科学版)》2006,36(2):295-297,304

活断层的勘探是城市发展中的一项重要任务。根据氡、汞断层气在断层上形成的机制,分析了断层气上氡、汞异常形态特征。根据长春市两条已知断层实例,分析了断层上土壤氡气、汞气异常的特征,可用该特征来确定断层的位置、产状以及推测断层的规模,探讨了盖层的性质对异常形成的影响。它们可为活断层勘探、评价提供有益的参考。  相似文献   

广东省东莞市1998～2003年生态足迹计算与分析   总被引：3，自引：0，他引：3  

唐金利  匡耀求  黄宁生  吴志峰  刘宇 《热带地理》2006,26(2):102-107,128

利用生态足迹模型定量研究广东省东莞市1998～2003年的可持续发展状况.结果表明,6年来东莞市的总生态足迹显现较快的上升趋势,每年平均增长12.9%,总生态承载力也是逐年上升(9%),但总生态赤字越来越大;从生态足迹的供需结构看,耕地和化石燃料用地的供需矛盾非常突出,林地、草地和水域供需相对较小.总的来说,东莞市的生态足迹已远超过其生态承载力,已对生态系统构成极大压力.从长远发展看,东莞市应该发展知识经济和循环经济,控制人口数量,并倡导新的生活方式和消费方式,同时要加强替代资源开发研究,以实现该地区发展  相似文献   

运城黄土吸力特性的试验研究   总被引：5，自引：2，他引：3  

王钊  骆以道  肖衡林  姚政法 《岩土力学》2002,23(1):51-54

应用张力计、热传导探头等吸力量测手段,对山西省运城地区黄土的吸力特性进行试验研究,测出了该黄土在脱湿过程的土-水特征曲线,该法较压力板法简单,还用FredlundandXing(1994)方程对实测数据进行了拟合。  相似文献   

基于遥感和地面数据的景观尺度叶面积指数和生物量的模拟   总被引：3，自引：0，他引：3  

张娜  于贵瑞  于振良  Zhao Shidong 《地理学报(英文版)》2003,13(2):139-152

The method for simulating the temporal and spatial distribution patterns of leaf area index (LAI) and biomass at landscape scale using remote sensing images and surface data was discussed in this paper,The procedure was:(1) annual maximum normalized difference vegetation index (NDVI) over the landscape was calculated from TM images;(2) the relationship model between NDVI and LAI was built and annual maximum LAI over the landscape was simulated;(3) the relationship models between LAI and biomass were built and annual branch ,stem ,root and maximum leaf biomass over the landscape were simulated;(4) spatial distribution patterns of leaf biomass and LAI in different periods all the year round were obtained.The simulation was based on spatial analysis module GRID in ArcoInfo software ,The method is laso a kind of scaling method from patch scale to landscape scale ,A case study of Changbai Mountain Nature Reserve was dissertated ,Aalysis and primary validation were carried out to the simulated LAI and biomass for the major vegetation types in the Changbai Mountain in 1995.  相似文献