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Optimizing an Abundance-Based Model for Satellite Remote Sensing of Phytoplankton Size Classes in the Bohai and Yellow Seas of China 期刊论文  OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2024, 卷号: 62, 页码: 13
作者:  Wang, Yueqi;  Liu, Dongyan;  Wang, Yujue;  Gao, Meng;  Gao, Zhiqiang
  |  收藏  |  浏览/下载：15/0  |  提交时间：2024/05/23
Optimizing an Abundance-Based Model for Satellite Remote Sensing of Phytoplankton Size Classes in the Bohai and Yellow Seas of China 期刊论文  OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2024, 卷号: 62, 页码: 13
作者:  Wang, Yueqi;  Liu, Dongyan;  Wang, Yujue;  Gao, Meng;  Gao, Zhiqiang
  |  收藏  |  浏览/下载：11/0  |  提交时间：2024/05/23
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：67/0  |  提交时间：2023/10/09
The Role of Satellite-Based Remote Sensing in Improving Simulated Streamflow: A Review 期刊论文  OAI收割
WATER, 2019, 卷号: 11, 期号: 8, 页码: 1615
作者:  Jiang, DJ;  Wang, K
  |  收藏  |  浏览/下载：30/0  |  提交时间：2020/07/08
Estimation of maize yield by using a process-based model and remote sensing data in the Northeast China Plain 期刊论文  OAI收割
PHYSICS AND CHEMISTRY OF THE EARTH, 2015, 卷号: 87-88, 页码: 5237-5249
作者:  Yao, Fengmei;  Tang, Yanjing;  Wang, Peijuan;  Zhang, Jiahua
收藏  |  浏览/下载：41/0  |  提交时间：2016/04/20
Location-based instant satellite image service: concept and system design 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF DIGITAL EARTH, 2015, 卷号: 8, 期号: 2
作者:  Liu, Jianbo;  Yang, Jin;  Chen, Fu;  Dai, Qin;  Zhang, Jing
收藏  |  浏览/下载：94/0  |  提交时间：2016/04/20
A cluster-based method for marine sensitive object extraction and representation 期刊论文  OAI收割
JOURNAL OF OCEAN UNIVERSITY OF CHINA, 2015, 卷号: 14, 期号: 4, 页码: 2027-2047
作者:  Xue Cunjin;  Dong Qing;  Qin Lijuan
收藏  |  浏览/下载：13/0  |  提交时间：2016/04/20
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.  
UV-VUV spectral irradiance responsivity calibration for space remote sensing spectroradiometer (EI CONFERENCE) 会议论文  OAI收割
Advanced Materials and Devices for Sensing and Imaging III, November 12, 2007 - November 14, 2007, Beijing, China
作者:  Yu H.
收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25
In order to overcome the irradiance responsivity calibration troubles caused by the weak response of most spectral radiometers in ultraviolet band and poor ratio of signal to noise  and to meet special calibration condition for some remote sensing spectroradiometers in space  a spectral irradiance responsivity calibration unit based on parallel light illumination mode is established  it is composed of a 150W deuterium lamp and a spherical mirror. The calibration unit gets the output standard value of spectral irradiance by irradiance transfer  this way avoids the spectral reflectance measurement difficulty of the spherical mirror. A flight spectral radiometer model used for space remote sense was calibrated in range from 160nm to 300nm  the calibration error of spectral irradiance responsivity is 4.7%. Some factors which contribute to calibration uncertainties are discussed.  
Method for computer-aided alignment of complex optical system (EI CONFERENCE) 会议论文  OAI收割
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 2, 2005 - November 5, 2005, Zian, China
作者:  Yu J.
收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25
For making complex optical system meet the design requirement  such as the space camera used in remote sensing and UVX lithophotography  especially for off-axis all-reflecting optical system  alignment technology is so necessary. In this paper  a method is presented. Based on the ideas of linearity instead of non-linearity and difference quotient instead of differential quotient  a mathematical model for computer-aided alignment is proposed. This model included the characteristics of the optical system  wavefront difference of its exit pupil and its misalignment of the misaligned optical system. Then comparing self-compiled software with alignment package of CODE V  as a result  this self-compiled software is much more valid than alignment package of CODE V. For a large aperture  long focal length and off-axis three-mirror optical system  computer-aided alignment is successful. Finally  the wavefront error of the middle field is 0.094 waves RMS and the wavefront error of +0.7 field is 0.106 waves RMS and the wavefront error of -0.7 field is 0.125 waves RMS at =632.8nm are obtained.