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Invalid image pixels often cluster within the overlapping region of neighboring Landsat scenes and can have negative impact on the quality of image composites generated from multiple Landsat scenes. We propose a method to automatically screen invalid image pixels in Landsat-4, 5, 7 images by generating a polygon smaller than the bounding box of each scene.(More)
A dynamic data with amendments model is proposed here on the basis of the base state with amendments model. Combined with the double-database strategy which stores history data and current data respectively, the new model further becomes the double-database strategy dynamic data with amendments model. Employing this model to store and manage temporal data(More)
A thermal analysis was performed on a biaxial scanning device of a 3-axis stability satellite to get the temperature variations of the device. The temperature field, which represents worst working condition, was imported to a structural model as a set of boundary condition. A few optical parameters were separated from the deformation results of the(More)
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