title: Analysing and correcting the differences between multi-source and multi-scale spatial remote sensing observations.
abstract: Differences exist among analysis results of agriculture monitoring and crop production based on remote sensing observations, which are obtained at different spatial scales from multiple remote sensors in same time period, and processed by same algorithms, models or methods. These differences can be mainly quantitatively described from three aspects, i.e. multiple remote sensing observations, crop parameters estimation models, and spatial scale effects of surface parameters. Our research proposed a new method to analyse and correct the differences between multi-source and multi-scale spatial remote sensing surface reflectance datasets, aiming to provide references for further studies in agricultural application with multiple remotely sensed observations from different sources. The new method was constructed on the basis of physical and mathematical properties of multi-source and multi-scale reflectance datasets. Theories of statistics were involved to extract statistical characteristics of multiple surface reflectance datasets, and further quantitatively analyse spatial variations of these characteristics at multiple spatial scales. Then, taking the surface reflectance at small spatial scale as the baseline data, theories of Gaussian distribution were selected for multiple surface reflectance datasets correction based on the above obtained physical characteristics and mathematical distribution properties, and their spatial variations. This proposed method was verified by two sets of multiple satellite images, which were obtained in two experimental fields located in Inner Mongolia and Beijing, China with different degrees of homogeneity of underlying surfaces. Experimental results indicate that differences of surface reflectance datasets at multiple spatial scales could be effectively corrected over non-homogeneous underlying surfaces, which provide database for further multi-source and multi-scale crop growth monitoring and yield prediction, and their corresponding consistency analysis evaluation.
authors.affiliation: Beijing Research Center for Information Technology in Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China; Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Dong
authors.affiliation: Institute of Agricultural Remote Sensing & Information Application, Zhejiang University, Hangzhou, Zhejiang, China.
authors.forename: Ruisen
authors.initials: R
authors.lastname: Luo
authors.affiliation: Beijing Research Center for Information Technology in Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China.
authors.forename: Haikuan
authors.initials: H
authors.lastname: Feng
authors.affiliation: Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China; Institute of Agricultural Remote Sensing & Information Application, Zhejiang University, Hangzhou, Zhejiang, China.
authors.forename: Jihua
authors.initials: J
authors.lastname: Wang
authors.affiliation: Beijing Research Center for Information Technology in Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China.
authors.forename: Jinling
authors.initials: J
authors.lastname: Zhao
authors.affiliation: LMAM, School of Mathematical Sciences, Peking University, Beijing, China.
authors.forename: Yining
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Beijing Research Center for Information Technology in Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China.
authors.forename: Guijun
authors.initials: G
authors.lastname: Yang
mesh_terms: D000383:Agriculture / Q000379:methods; D000465:Algorithms; D058998:Remote Sensing Technology / Q000379:methods / Q000592:standards*; D059629:Signal-To-Noise Ratio