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In flight MTF monitoring and compensation for CCD camera on CBERS-02

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Science china(Technological Sciences) 2005年第S2期48卷 29-43页

作者： GU Xingfa1,2.3, LI Xiaoying1,2.4, MIN Xiangjun5, YU Tao1,2. SUN Jijuan5, ZENG Yong1,2.4, XU Hua1,2.& GUO Ding2.6 1. State Key Laboratory of remote sensing Science, Jointly Sponsored by the Institute of remote sensing Applications of Chinese Academy of Sciences and beijing normal university, beijing 100101, china 2. The center for National Spaceborne Demonstration, beijing 100101, china 3. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84914 Avignon, France 4. Graduate university of Chinese Academy of Sciences, beijing 100039, china 5. china center for Resource Satellite Data and Application, beijing 100830, china 6. university of Electronic Science and Technology of china, Chengdu 610054, china State Key Laboratory of remote sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University 100101 Beijing China The center for National Spaceborne Demonstration 100101 Beijing China Institut National de la Recherche Agronomique Climat Sol Environnement 84914 Avignon France Graduate university of Chinese Academy of Sciences 100039 Beijing China china center for Resource Satellite Data and Application 100830 Beijing China university of Electronic Science and Technology of china 610054 Chengdu China

In this article, the approach of simulating ideal tarp scene was proposed to determine the MTF for CCD camera on CBERS-02. The MTF acquired from this technique was compared to those from some common methods. MTFs achieved from different approaches were employed to compensate the CCD images based on three restoration algorithms: the iterative method, the Wiener filter and the modified inverse filter (MIF). The two-dimensional MTF was established with the value at frequency 0.5 for 45° directional MTF as the value at its four corners. This article addressed the variations of the restored CCD images with different techniques of constructing two-dimensional MTF, restoring algorithms and determining the in-flight MTFs. Results showed images restored with the MTF determined from the technique of simulating ideal tarp scene represent the real scene best. And the restoration technique based on the MIF would produce better restored images than the other two techniques. This research also demonstrated that the two-dimensional MTF used for restoration should be interpolated under the control of the MTF for 45° axis, rather than by multiplying the cross-orbit MTF with along-orbit MTF.

关键词： CBERS-02 CCD MTF the technique of simulating ideal tarp scene.

Estimation of net primary productivity in china using remote {2. data

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Journal of Geographical Sciences 2001年第1期11卷 14-23页

作者： SUN Rui, ZHU Qi-jiang (Dept. of Resources and Environment Sciences, beijing normal university, beijing 100875,{2.) Dept. of Resources and Environment Sciences Beijing Normal University Beijing China

It is significant to estimate terrestrial net primary productivity (NPP) accurately not only for global change research, but also for natural resources management to achieve sustainable development. remote {2. data can describe spatial distribution of plant resources better. So, in this paper an NPP model based on remote {2. data and climate data is developed. And 1km resolution AVHRR NDVI data are used to estimate the spatial distribution and seasonal change of NPP in china. The results show that NPP estimated using remote {2. data are more close to truth. Total annual NPP in china is 2.645X109 tC. The spatial distribution of NPP in china is mainly affected by precipitation and has the trend of decreasing from southeast to northwest.

关键词： remote sensing net primary productivity vegetation model seasonal change

research on the Earth system multi-body force system dynamical model

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Science china(Technological Sciences) 2006年第z2期49卷 11-22页

作者： CHEN Xiaofei, BI Siwen, WU Fei & DONG Qianlin State Key Laboratory of remote sensing Science, Jointly Sponsored by the Institute of remote sensing Applications of Chinese Academy of Sciences and beijing normal university, beijing 100101, china Laboratory of 3D Information Access and Application of Capital normal university, beijing 100037, china Chinese Acad Sci Inst Remote Sensing Applicat State Key Lab Remote Sensing Sci Beijing 100101 Peoples R China beijing normal Univ Beijing 100101 Peoples R China Capital normal Univ Lab D Informat Access & Applicat 3 Beijing 100037 Peoples R China

This paper presents an overview of the binding force and freedom force of Earth system, and describes force moment to point and line and force system in the Earth system. It introduces the force theory of the Earth system multi-body force system from special or equivalent force system of Earth system mechanics, general force and no-power force of Earth system. Finally it describes the force and moment of nodes of Earth system and provides basic model for the research of the Earth system multi-body dynamics.

关键词： Earth system, multi-body system force, dynamics, basic models.

Monitoring Dynamic Change of Land Cover Based on SVM and Satellite Images in Hanoi,Vietnam

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Wuhan university Journal of Natural Sciences 2010年第4期15卷 355-362页

作者： ZHAO Jinling1,2. LIU Chuang1, 3 1. Institute of Geographic Sciences and Natural Resources research, Chinese Academy of Sciences, beijing 100101,{2. 2. Graduate university of Chinese Academy of Sciences, beijing 100049,{2. 3. College of Resources Science and Technology, beijing normal university, beijing 100875,{2. Institute of Geographic Sciences and Natural Resources research Chinese Academy of Sciences Beijing China Graduate university of Chinese Academy of Sciences Beijing China College of Resources Science and Technology Beijing Normal University Beijing China

An integral method,combining support vector ma-chine (SVM) with remote-sensing analysis techniques,was ex-plored to monitor Hanoi’s dynamic change of land cover. The landsat thematic mapper (TM) image in 1993,the enhanced the-matic mapper plus (ETM+) image in 2.00,and the image with the charge-coupled device camera (CCD) on the{2.-Brazil earth resources satellite (CBERS) in 2.08 were used. Six land-cover types,including built-up areas,woodland,cropland,sand,water body and unused land,were identified. The detected results showed visually the rapid urban expansion as well as land-cover change of Hanoi from 1993 to 2.08. There were 12.637.54 hm2.cropland de-creased between 1993 and 2.00,and 8 2.7.6 hm2.cropland de-creased between 2.00 and 2.08. Compared with cropland,wood-land firstly decreased and then increased,and the other types did not change significantly. The results indicate that CBERS dataset has the application potential in world resources researches.

关键词： land cover the china-Brazil earth resources satellite (CBERS) support vector machine (SVM) change detection

Geologic body three-dimensional model generation and visualization method

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中国有色金属学会会刊：英文版 2005年第S1期15卷 190-192页

作者： ZHANG Song-mei~(1, 2., LI Jing~1, ZHAO Wen-ji~3, Gong Hui-li~3, Duan Fu-zhou~3, GONG Zhao-ning~3, LI Jia-hong~4 (1. beijing normal university, beijing 100875,{2. 2. Jilin university, Changchun 130061,{2. 3. The Key Lab of Resource Environment and gis, beijing 100037,{2. 4. National remote sensing center of{2., beijing 100862.{2.) beijing normal Univ Beijing 100875 Peoples R China Jilin Univ Changchun 130061 Peoples R China Key Lab Resource Environm Beijing 100037 Peoples R China gis Beijing 100037 Peoples R China Natl remote sensing Ctr{2. Beijing 100862 Peoples R China

The divergence three-dimensional millet-seed body model and the continuous distributing layer-imitating model were introduced, which were used to express geologic body, and the procedure of generating these two models and their merits and demerits were synthesized. Three methods of geologic body’s three-dimensional expression were separately introduced, and the merits of the continuous distributing layer imitating model were proposed as comparing with the divergence three-dimensional millet-seed body model. The three-dimensional cubes were observed from any direction and any tangle with the application of dealing methods such as peeling, hollowing out, transparent or half-transparent.

关键词： geologic body regular grid net irregular triangle net three-dimensional visualization

remote sensing based shrub above-ground biomass and carbon storage mapping in Mu Us desert,{2.

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Science china(Technological Sciences) 2010年第S1期53卷 176-183页

作者： XU Min 1,2.CAO ChunXiang 1,TONG QingXi 1,LI ZengYuan 3,ZHANG Hao 1,HE QiSheng 1,2.GAO MengXu 1,2.ZHAO Jian 1,2.ZHENG Sheng 1,2.CHEN Wei 1,2.& ZHENG LanFen 1 1State Key Laboratory of remote sensing Science,Jointly Sponsored by the Institute of remote sensing Applications of Chinese Academy of Sciences and beijing normal university,beijing 100101,china 2.Graduate School of the Chinese Academy of Sciences,beijing 100049,china 3 research Institute of Forest Resources and Information Techniques,Chinese Academy of Forestry,beijing 10009,china 1. State Key Laboratory of remote sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing 100101 China 2. Graduate School of the Chinese Academy of Sciences Beijing 100049 China 3. research Institute of Forest Resources and Information Techniques Chinese Academy of Forestry Beijing 10009 China

The estimation of above-ground biomass(AGB) and carbon storage is very important for arid and semi-arid ***-1A/B satellite data combined with field measurement data was used for the estimation of shrub AGB and carbon storage in the Mu Us desert,*** correlations of shrub AGB and spectral reflectance of four bands as well as their combined vegetation indexes were respectively analyzed and stepwise regression analysis was employed to establish AGB prediction *** prediction equation based on ratio vegetation index(RVI)was proved to be more suitable for shrub AGB estimation in the Mu Us desert than *** AGB and carbon storage were mapped using the RVI based prediction model in *** statistics showed the western Mu Us desert has relatively high AGB and carbon storage,and that the gross shrub carton storage in Mu Us desert reaches 16 799 2.0 t,which has greatly contributed to the carbon fixation in northern china.

关键词： above-ground biomass carbon storage Mu Us desert HJ-1A/B remote sensing

Study on movement inertia in the Earth multi-body system

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Science china(Technological Sciences) 2006年第z2期49卷 70-79页

作者： CHEN Xiaofei, BI Siwen & GONG Huili Key Laboratory of 3D Information Acquisition and Application, Ministry of Education, Capital normal university, {2. 100037, china National Key Laboratory of remote sensing Science, Institute of remote sensing Applications (IRSA), Chinese Academy of Sciences, {2. 100101, china Capital normal Univ Minist Educ Key Lab D Informat Acquisit & Applicat Beijing 100037 Peoples R China Chinese Acad Sci Inst Remote Sensing Applicat Natl Key Lab Remote Sensing Sci Beijing 100101 Peoples R China

This paper summarizes the first movement and mass centre of stratum-block movement inertia in the Earth multi-body system and introduces its application. It also elaborates the moment of inertia and the products of inertia: the inertia dyadic transformation of reference system and the parallel axis theorem of stratum-block movement inertia of the Earth multi-body system. It provides an academic foundation for research on the dynamic model of Earth multi-body system.

关键词： Earth multi-body system, stratum block, movement inertia.

Earth system multi-body restriction dynamics model research

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Science china(Technological Sciences) 2006年第z2期49卷 80-87页

作者： ZHANG Qingxian, BI Siwen& GONG Huili Key Laboratory of Three-Dimensional Information Acquisition and Application, Ministry of Education, Capital normal university, {2. 100037, china National Key Laboratory of remote sensing Science, Institute of remote sensing Applications of Chinese Academy of Sciences, {2. 100101, china Capital normal Univ Minist Educ Key Lab Dimens Informat Acquisit & Applicat 3 Beijing 100037 Peoples R China Chinese Acad Sci Inst Remote Sensing Applicat Natl Key Lab Remote Sensing Sci Beijing 100101 Peoples R China

research provides a theoretical basis for an Earth system multi-body mechanics model and its dynamics, including the Earth system multi-body restriction function and its power, Earth system multi-body restriction under decreasing generalized velocity and decreasing partial palstance, the Earth system multi-body decreasing generalized force, a moving mechanics function, and the Earth system multi-body restriction's wattful and wattless forces.

关键词： Earth system, multi-body restriction, dynamics model.

A new algorithm for microwave radiometer remote sensing of sea surface salinity and temperature

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Science china Earth Sciences 2006年第11期49卷 1204-1211页

作者： YIN Xiaobin1, LIU Yuguang1, WANG Zhenzhan2.& XIU Peng1 1. Physical Oceanography Laboratory, Ocean university of china, Qingdao 2.6003, china 2. center for Space and Applied research, Chinese Academy of Sciences, beijing 100080, china 1. Physical Oceanography Laboratory Ocean University of China Qingdao 266003 China 2. center for Space and Applied research Chinese Academy of Sciences Beijing 100080 China

The microwave radiation of the sea surface, which is denoted by the sea surface brightness temperature, is not only related with sea surface salinity (SSS) and temperature (SST), but also influenced by sea surface wind. The errors of wind detected by satellite sensor have significant influences on the accuracy of SSS and SST retrieval. The effects of sea surface wind on sea surface brightness temperature, i.e. △Th,v, and the relations among △Th,v, wind speed, sea surface tempera- ture, sea surface salinity and incidence angle of observation are investigated. Based on the investi- gations, a new algorithm depending on the design of a single radiometer with double polarizations and multi-incidence angles is proposed. The algorithm excludes the influence of sea surface wind on SSS and SST retrieval, and provides a new method for remote sensing of SSS and SST.

关键词： microwave radiometer, sea surface temperature, sea surface salinity, wind, brightness temperature.