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- W434528800 abstract "This thesis is concerned with the geocoding of Synthetic Aperture Radar (SAR) imagesand the use of stereo SAR images. The work was carried out as part of the preparation forthe launch of the ERS-1 sateffite, due in July 1991, which will carry a SAR sensor.There are two basic approaches to geocoding: image-to-object and object-to-image.Both of these methods have been analysed and assessed on experimental data, namelySIR-B imagery of Mount Shasta. Each type of geocoding requires the solution of nonlinearequations. It has been shown that if the parameters which control the geocodingprocess are given to a good degree of accuracy, each method can give good results. Theeffect of inaccuracies in the estimation of these parameters has also been analysed. It wasfound that there was a predominantly linear response to parameter error in both types ofgeocoding.Experimental investigations into the effects of the resampling, inherent in operationalgeocoding, showed that the statistical properties of the resulting image may be severely corruptedwith pixel values of less than zero being obtained. This discovery has subsequentlybeen given theoretical support.Height can be determined from stereo pairs of images and digital elevation models canthus be produced, aiding both geocoding and topographic mapping. Existing approachesto SAR/SAR stereo all appear to be based on photograinmetric methods. An alternative,analytic approach, believed to be novel, is described and applied to the same Mount Shastaimagery. Using this method, with accurately-known controlling parameters, correspondencewith ground data is excellent. However, an analysis of the sensitivity of the approach toinaccuracies in the controlling parameters shows that the method is extremely sensitive toerror.The possibility of combining SAR and optical/infrared imagery for stereometric purposes is also discussed from a theoretical viewpoint." @default.
- W434528800 created "2016-06-24" @default.
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- W434528800 date "1991-01-01" @default.
- W434528800 modified "2023-09-28" @default.
- W434528800 title "Geocoding and stereoscopy of synthetic aperture radar imagery." @default.
- W434528800 hasPublicationYear "1991" @default.
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