中国科学院机构知识库网格系统: 检索

Comprehensive evaluation of precipitation datasets over Iran 期刊论文 OAI收割
JOURNAL OF HYDROLOGY, 2021, 卷号: 603, 页码: 23
作者: Saemian, Peyman; Hosseini-Moghari, Seyed-Mohammad; Fatehi, Iman; Shoarinezhad, Vahid; Modiri, Ehsan

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收藏 | 浏览/下载：34/0 | 提交时间：2022/09/21

Gauge-based products Reanalysis products Satellite observations Statistical evaluation Point-to-pixel approach Pixel-to-pixel approach

Comprehensive evaluation of precipitation datasets over Iran 期刊论文 OAI收割
JOURNAL OF HYDROLOGY, 2021, 卷号: 603, 页码: 23
作者: Saemian, Peyman; Hosseini-Moghari, Seyed-Mohammad; Fatehi, Iman; Shoarinezhad, Vahid; Modiri, Ehsan

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收藏 | 浏览/下载：19/0 | 提交时间：2022/09/21

Gauge-based products Reanalysis products Satellite observations Statistical evaluation Point-to-pixel approach Pixel-to-pixel approach

Comparing Pixel-Based Random Forest and the Object-Based Support Vector Machine Approaches to Map the Quasi-Circular Vegetation Patches Using Individual Seasonal Fused GF-1 Imagery 期刊论文 OAI收割
IEEE ACCESS, 2020, 卷号: 8, 页码: 228955-228966
作者: Shi, Lei; Liu, Qingsheng; Huang, Chong; Li, He; Liu, Gaohuan

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收藏 | 浏览/下载：23/0 | 提交时间：2021/03/15

Vegetation mapping Support vector machines Radio frequency Spatial resolution Satellites Vegetation Remote sensing Gaofen 1 satellite imagery objected-based support vector machine pixel-based random forest quasi-circular vegetation patch season influence

Comparing Pixel-Based Random Forest and the Object-Based Support Vector Machine Approaches to Map the Quasi-Circular Vegetation Patches Using Individual Seasonal Fused GF-1 Imagery 期刊论文 OAI收割
IEEE ACCESS, 2020, 卷号: 8, 页码: 228955-228966
作者: Shi, Lei; Liu, Qingsheng; Huang, Chong; Li, He; Liu, Gaohuan

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收藏 | 浏览/下载：18/0 | 提交时间：2021/03/15

Vegetation mapping Support vector machines Radio frequency Spatial resolution Satellites Vegetation Remote sensing Gaofen 1 satellite imagery objected-based support vector machine pixel-based random forest quasi-circular vegetation patch season influence

Upscaling evapotranspiration measurements from multi-site to the satellite pixel scale over heterogeneous land surfaces 期刊论文 OAI收割
AGRICULTURAL AND FOREST METEOROLOGY, 2016, 卷号: 230, 页码: 97-113
作者: Liu, Shaomin; Xu, Ziwei; Song, Lisheng; Zhao, Qianyi; Ge, Yong

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收藏 | 浏览/下载：54/0 | 提交时间：2019/09/26

Evapotranspiration Upscaling The satellite pixel scale The Priestley-Taylor equation

Assessing Consistency of Five Global Land Cover Data Sets in China SCI/SSCI论文 OAI收割
2014
作者: Feng M.

收藏 | 浏览/下载：39/0 | 提交时间：2014/12/24

land cover per-pixel comparison agreement consistency China surface parameterization sib2 accuracy assessment atmospheric gcms satellite data igbp discover products validation maps vegetation glc2000

Earth elevation map production and high resolution sensing camera imaging analysis (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者: Dai L.

收藏 | 浏览/下载：147/0 | 提交时间：2013/03/25

The Earth's digital elevation which impacts space camera imaging has prepared and imaging has analysed. Based on matching error that TDI CCD integral series request of the speed of image motion statistical experimental methods-Monte Carlo method is used to calculate the distribution histogram of Earth's elevation in image motion compensated model which includes satellite attitude changes orbital angular rate changes latitude longitude and the orbital inclination changes. And then elevation information of the earth's surface from SRTM is read. Earth elevation map which produced for aerospace electronic cameras is compressed and spliced. It can get elevation data from flash according to the shooting point of latitude and longitude. If elevation data between two data the ways of searching data uses linear interpolation. Linear interpolation can better meet the rugged mountains and hills changing requests. At last the deviant framework and camera controller are used to test the character of deviant angle errors TDI CCD camera simulation system with the material point corresponding to imaging point model is used to analyze the imaging's MTF and mutual correlation similarity measure simulation system use adding cumulation which TDI CCD imaging exceeded the corresponding pixel horizontal and vertical offset to simulate camera imaging when stability of satellite attitude changes. This process is practicality. It can effectively control the camera memory space and meet a very good precision TDI CCD camera in the request matches the speed of image motion and imaging. 2010 SPIE.

Study on dynamic imaging on TDI CCD optical remote sensor of push-broom technology (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者: Liu L.; Ren J.-Y.; Liu L.; Gao M.-H.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

A set special detecting system is proposed based on TDICCD push-broom technology applying in dynamic imaging detecting experiment of space optics remote sensor. In the system In the course of detecting push-broom movement of the satellite is simulated through using double supporting U structure precision rotary platform with remote sensor by angular speed 0.555/s regard Nyquist frequency target as detecting aim within the range of 5 and control precision on steady speed achieves 0.3% in order to solve matching uncertainty between the CCD pixel and the vertical target strip image when the remote sensor does push-broom make matching simplify enhance the measurement result the accuracy. So the tolerance a/n arithmetic progression gap target strip is joined in each group of rectangular vertical group target strip. The remote sensor obtains in vertical the level and 45 the direction 0 fields of view 0.86 the field of view Nyquist frequency target strip image after detected a group target strip which can precision matching to TDICCD pixel at least can be obtained through analysis and dealing with 0.86 field of view's target strip image. The experiment not only verifies the detecting system's feasibility but simultaneously verifies whether to have the high quality dynamic imaging quality when TDICCD push-broom technology is adopted on the remote sensor developed. 2010 Copyright SPIE - The International Society for Optical Engineering.

Influence of the TDI CCD camera takes pictures when high resolution satellite lateral swaying (EI CONFERENCE) 会议论文 OAI收割
2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China
作者: Zhang L.; Zhang L.; Sun Z.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

When the satellite was swinging and taking lateral imaging the TDI CCD pixel photovoltaic charge purses transferred velocity not matched with the image motion velocity. According to the requirement of high-resolution satellite which was taking lateral imaging at a low orbit the factors that bring about the unmatched phenomenon were analysed inclusive of the Earth's rotation the Earth curvature satellite attitude change measurement error and the installation error etc. Image motion errors caused by various factors were analysed and solved and the different characters of image motion errors were synthesized. Finally the total errors on the impact of imaging system MTF was analyzed. 2009 IEEE.

Accurate quantification of grassland cover density in an alpine meadow soil based on remote sensing and GPS SCI/SSCI论文 OAI收割
2005
Liu Y. S.; Hu Y. C.; Peng L. Y.

收藏 | 浏览/下载：23/0 | 提交时间：2012/06/08

alpine meadow soil grassland cover density quantitative remote sensing Qinghai Lake vegetation indexes landsat tm china satellite degradation resolution variables pixel