中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共6条,第1-6条 帮助

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Satellite tracking data reveal the underestimate population size of the ground survey 期刊论文  OAI收割
BIODIVERSITY AND CONSERVATION, 2025, 卷号: N/A
作者:  
Chenxi, Wang;  Shaoxia, Xia;  Xiubo, Yu;  Li, Wen
  |  收藏  |  浏览/下载:12/0  |  提交时间:2025/03/18
Optimal selection of GCPs from Global Land Survey 2005 for precision geometric correction of Landsat-8 imagery 期刊论文  OAI收割
EUROPEAN JOURNAL OF REMOTE SENSING, 2015, 卷号: 48
作者:  
Li, Shanshan;  Peng, Man;  Wu, Changshan;  Feng, Xuxiang;  Wu, Yeiwei
收藏  |  浏览/下载:28/0  |  提交时间:2016/04/20
The ELT situation in China 会议论文  OAI收割
Retirement Symposium for Arne Ardeberg on Extremely Large Telescopes - Which Wavelengths, Lund, SWEDEN, 2007-11-29
作者:  
Liu Z(刘忠);  Cui, XQ;  Liu Z(刘忠)
收藏  |  浏览/下载:14/0  |  提交时间:2016/04/06
Present and future Chinese large telescope projects 会议论文  OAI收割
Cape Town, South Africa, 2005-11-14
作者:  
Xiangqun Cui
收藏  |  浏览/下载:37/0  |  提交时间:2013/12/24
Using ground-penetrating radar to detect permafrost degradation in the northern limit of permafrost on the Tibetan Plateau 期刊论文  iSwitch采集
COLD REGIONS SCIENCE AND TECHNOLOGY, 2005, 卷号: 41, 期号: 3, 页码: 211-219
作者:  
Wu, TH;  Li, SX;  Cheng, GD;  Nan, ZT
收藏  |  浏览/下载:26/0  |  提交时间:2019/10/08
Error analysis and test study of fiber optic gyroscope north-finder (EI CONFERENCE) 会议论文  OAI收割
Advanced Sensor Systems and Applications II, November 8, 2004 - November 12, 2004, Beijing, China
Zhang Z.; Sun J.; Wu K.
收藏  |  浏览/下载:22/0  |  提交时间:2013/03/25
North-finder system is an important application of the inertial technology. It provides true north azimuth information to f all kinds of ground-based equipment. This paper designed a dynamic automatic north-finder based on the modulation output of fiber optic gyroscope (FOG). In this scheme  the sine output signal of the FOG was sampled and disposed  and then the real north of surveyed point on the surface of earth was calculated. The deviation caused by the base tilt was compensated by an accelerator. The output signals of FOG and accelerator were computed combined with the position sampled from increasing encoder by digital signal processor. Successive rotating technique was adopted to modulate the FOG signal periodically. Most of the low frequency part of random gyro drift errors was compensated. The north-finder accuracy was improved compared with the traditional static measuring method. The test result shows the FOG automatic north-finder obtains 2' true north angle accuracies within not more than three minutes  can meet the orientation need of artillery  terrain measurement vehicle  armored car  unmanned drive vehicle  geodetic survey and tunnel exploration.