中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Evaluation of slip rate on Astara fault system, North Iran 期刊论文  OAI收割
JOURNAL OF EARTH SCIENCE, 2016, 卷号: 27, 期号: 6, 页码: 971-980
作者:  
Barzegari, Amir;  Esmaeili, Rasoul;  Ebrahimi, Mohammad;  Faghih, Ali;  Ghorashi, Manucher
  |  收藏  |  浏览/下载:23/0  |  提交时间:2017/11/17
Mass Loss from Glaciers in the Chinese Altai Mountains between 1959 and 2008 Revealed Based on Historical Maps, SRTM, and ASTER Images 期刊论文  OAI收割
Journal of Mountain Science, 2015, 卷号: 12, 期号: 2, 页码: 330-343
WEI Jun-feng; LIU Shi-yin; XU Jun-li; GUO Wan-qin; BAO Wei-jia; SHANGGUAN Dong-hui; JIANG Zong-li
收藏  |  浏览/下载:28/0  |  提交时间:2015/03/24
Finite element method to invert coseismic slip of yutian earthquake from InSAR 会议论文  OAI收割
6th International Symposium on Digital Earth: Data Processing and Applications, Beijing, China, September 9, 2009 - September 12,2009
Wang, Chisheng; Wang, Changlin; Shan, Xinjian; Zhang, Guohong; Guo, Liming; Han, Yufei
收藏  |  浏览/下载:22/0  |  提交时间:2014/12/07
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.