中国科学院机构知识库网格系统: 检索

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	Approaches to assessing the daily average ground surface soil heat flux on a regional scale over the Qinghai-Tibet Plateau 期刊论文 OAI收割 AGRICULTURAL AND FOREST METEOROLOGY, 2023, 卷号: 336, 页码: 13 作者: Yang, Cheng; Wu, Tonghua; Hu, Guojie; Zhu, Xiaofan; Yao, Jimin \| 收藏 \| 浏览/下载：68/0 \| 提交时间：2023/10/09 Qinghai-Tibet Plateau Daily average ground surface soil heat flux Remote sensing-based model Combination method Sine method
	Monitoring cyanobacteria bloom in dianchi lake based on ground-based multispectral remote-sensing imaging: Preliminary results 期刊论文 OAI收割 Remote Sensing, 2021, 卷号: 13, 期号: 19 作者: Zhao, Huan; Li, Junsheng; Yan, Xiang; Fang, Shengzhong; Du, Yichen \| 收藏 \| 浏览/下载：52/0 \| 提交时间：2021/10/18 Dianchi Lake cyanobacterial blooms satellite remote sensing ground-based remote sensing
	Retrieval of Stratospheric HNO3 and HCl Based on Ground-Based High-Resolution Fourier Transform Spectroscopy 期刊论文 OAI收割 REMOTE SENSING, 2021, 卷号: 13 作者: Shan, Changgong; Zhang, Huifang; Wang, Wei; Liu, Cheng; Xie, Yu \| 收藏 \| 浏览/下载：34/0 \| 提交时间：2021/08/31 FTIR ground based remote sensing HNO3 HCl stratospheric column
	An Assessment of Using Remote Sensing-Based Models to Estimate Ground Surface Soil Heat Flux on the Tibetan Plateau during the Freeze-Thaw Process 期刊论文 OAI收割 REMOTE SENSING, 2020, 卷号: 12, 期号: 3, 页码: 24 作者: Yang, Cheng; Wu, Tonghua; Yao, Jimin; Li, Ren; Xie, Changwei \| 收藏 \| 浏览/下载：65/0 \| 提交时间：2020/05/19 ground surface soil heat flux Tibetan plateau the freezing-thawing process remote sensing-based models
	Representativeness errors of point-scale ground-based solar radiation measurements in the validation of remote sensing products 期刊论文 iSwitch采集 REMOTE SENSING OF ENVIRONMENT, 2016, 卷号: 181, 页码: 198-206 作者: Huang, Guanghui; Li, Xin; Huang, Chunlin; Liu, Shaomin; Ma, Yanfei 收藏 \| 浏览/下载：32/0 \| 提交时间：2019/10/09 Representativeness error Solar radiation Ground-based measurements Remote sensing products Validation
	Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China Gu S.; Yan Y.; Xu K.; Jin G. 收藏 \| 浏览/下载：47/0 \| 提交时间：2013/03/25 With the development of aerospace remote sensing technology the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera the compensation method of image motion to space camera is researched. First the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second the system adopts 80C31 as controller of drift angle and adopts stepping motor for actuators and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced and it achieve the closed-loop control of the drift angle position. At the last this paper analyses the transmission precision of the mechanism. Through the experiment we measured the actual precision of the image motion compensation mechanism and compared with the theoretical analysis. There are two major contributions in this paper. First the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism it will bring adverse effects for the precision and stiffness of mechanism. For this problem This paper designed a image motion compensation that have some advantages such as small size light weight at the same time high precision stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second the traditional mechanism control need to corrected fitting and iterative for the control formula of mechanism. Only in this way we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5 -4 -3 -2 -1 0 +1 +2 +3 +4 +4 as the expectation value of the imaginary drift angle we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3' and it can achieve the high-precision image motion compensation. 2011 SPIE.
	Design and analysis of auto-focus assembly for spaceborne remote sensing camera (EI CONFERENCE) 会议论文 OAI收割 2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China 作者: Chen W.; Gao X. 收藏 \| 浏览/下载：29/0 \| 提交时间：2013/03/25 Spaceborne remote sensing camera may be out of focus when the environment and photographic distance changes. In order to get higher ground sampled distance for the camera based on the experience gained from the development of a remote sensing camera working principle of auto-focus assembly control system was discussed. Time of waveform extraction was reduced. It sets force an auto-focus assembly that uses cam and line guide rail in order to move the lens group. The motion error of the auto-focus assembly was difficult to be eliminated and would affect on the focusing accuracy of the spaceborne remote sensing camera directly. So it was analyzed at both ends of the focusing structure. The CCD detector can keep stable when the remote sensing camera is imaging. The motion error was tested to verify the validity of the simulation result and it is less than 0.01mm. Its accuracy meets using demand. The focusing method of moving focal plane is suitable for spaceborne remote sensing camera. 2011 IEEE.