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dc.contributorNicolás Álvarez, Jorge
dc.contributorBroquetas Ibars, Antoni
dc.contributor.authorAmlou Knidel, Anas
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.description.abstractGeosynchronous orbits have the unique characteristic that their orbital period is equal to one sidereal day. This configuration does provide coverage on a regional scale. This is a potential advantage in terms of system usage as the demand for some satellite services is concentrated in certain regions of the globe. However, the orbit is not 100 \% determined since different perturbations appear (e.g. asphericity and non-homogeneity of Earth, the action of third bodies) and degrade the GEO orbit trajectory. The aim of Geostationary Synthetic Aperture Radar (GeoSAR) missions is to obtain daily images of short-period events that take place over the Earth¿s surface. Some of them are critical to monitor (e.g. land stability control, natural risks prevention, or accurate numerical weather prediction models from water vapor atmospheric mapping) since their fast evolution is not observable with current Low Earth Orbit (LEO) based systems. The aim of the project is the development of an orbit estimation software based on Extended Kalman Filtering in order to process experimental interferometric observations. Kalman Filtering consists on a recursive predictive filter that estimates the state variables of a dynamic linear system, based on a prediction-correction algorithm to produce the estimation of unknown variables. Extended Kalman filter (EKF) is the nonlinear version of the Kalman filter which linearizes about an estimate of the current mean and covariance. The activity of this project takes place in the context of the new ESA 10th Earth Explorer pre-selected Geosynchronous Radar mission G-CLASS/Hydroterra, with the aim of reducing the satellite revisit times from minutes to hours with respect to LEO missions
dc.publisherUniversitat Politècnica de Catalunya
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Radar
dc.subject.otherPrecise orbit determination
dc.subject.otherRemote sensing
dc.titleInterferometric precise orbit determination of geostationary satellite missions using extended Kalman filters (GeoSar Mission)
dc.typeBachelor thesis
dc.rights.accessRestricted access - confidentiality agreement
dc.audience.educationlevelEstudis de primer/segon cicle
dc.audience.mediatorEscola d'Enginyeria de Telecomunicació i Aeroespacial de Castelldefels

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