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Showing 1 to 5 of 5 for “"Celestial navigation"”.
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Multiple hypothesis positioning algorithm for robust GPS-denied navigation
… GPS has become the dominant source of precision navigation and is often required for many modern systems to operate. However, recent exposure of GPS vulnerabilities have called into question its overall resiliency and shown necessity for robust alternatives. Precision celestial navigation using …
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A compressive sensing algorithm for attitude determination
… as stars, and apply it to solve a problem in celestial navigation. Specifically, let x [epsilon] RN be an N-pixel image, consisting of a small number of local distinguishable objects plus noise. Our goal is to design an m x N measurement matrix A with m << N, such that we can recover an …
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Local Informants and British Explorers: the Search for the Source of the Nile, 1850-1875
… to explorers based upon the techniques of celestial navigation and surveying available for field research in the 1850s. The instructions emphasized careful, daily recording of data, using instruments as much as possible. However, in the field explorers experienced a diminished ability to …
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Lunar Surface Navigation Using Gravity and Star Tracker Measurements
… lunar missions prompt the need for new surface navigation techniques. Current position and orientation (POSE) methods employ star trackers (ST) and accelerometers but do not incorporate the use of an external gravity field. The Multiplicative Extended Kalman Filter (MEKF) developed in this study …
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Skylight Polarization Patterns as Cues for Honey Bee Orientation; Physical Measurements and Behavioral Experiments
… are shown to be potentially useful for animal navigation. Because the polarization patterns rotate around the celestial poles they could be used to locate the pole point where the earth's axis of rotation intersects the celestial sphere. Observation of the pole point could provide an animal …