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Closure phase information


The closure phase is an observable quantity in imaging astronomical interferometry, which allowed the use of interferometry with very long baselines. It forms the basis of the self-calibration approach to interferometric imaging. The observable which is usually used in most "closure phase" observations is actually the complex quantity called the triple product (or bispectrum). The closure phase is the phase (argument) of this complex quantity.

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Closure phase

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The closure phase is an observable quantity in imaging astronomical interferometry, which allowed the use of interferometry with very long baselines....

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Valve float

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an internal combustion engine valvetrain do not properly follow the closure phase of the cam lobe profile. This reduces engine efficiency and performance...

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Closure of tidal inlets

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this critical closure phase to prevent severe erosion of existing defences. Two primary methods are used: the abrupt or sudden closure method, which involves...

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Tudor IT Process Assessment

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of roles who take part in the assessment. The project is organized in 6 phases. It is supported by several tools (templates and spreadsheets) provided...

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Astronomical interferometer

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Interferometer and the IOTA array. A number of other interferometers have made closure phase measurements and are expected to produce their first images soon, including...

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Infrared Optical Telescope Array

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Whipple Observatory. In 2000 the third telescope came online providing closure phase observations, allowing aperture synthesis imaging to be performed for...

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Base Realignment and Closure

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Base Realignment and Closure (BRAC) was a process by a United States federal government commission to increase the efficiency of the United States Department...

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Mount Wilson Observatory

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wavelength of 11 micrometers. On July 9, 2003, ISI recorded the first closure phase aperture synthesis measurements in the mid infrared. The Center for...

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Stuttgart Airport

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345 m (10,974 ft) in 1996. Renovation was scheduled for 2020, full closure phase was preponed to be completed in April during the corona lockdown. The...

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Speckle imaging

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interferometry called speckle masking' involves calculation of the bispectrum or closure phases from each of the short exposures. The "average bispectrum" can then...

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Infrared Spatial Interferometer

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wavelength of 11 micrometres. On 9 July 2003, ISI recorded the first closure phase aperture synthesis measurements in the mid infrared. Spaceflight portal...

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Mine closure planning

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planning and development phase – and even earlier, during the exploration phase – have profound effects on the ultimate closure plan, its cost, and the...

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Crack closure

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Crack closure occurs from the presence of material propping open the crack faces and can arise from many sources including plastic deformation or phase transformation...

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UH88

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On December 4, 1984 it became the first telescope to make optical closure phase measurements on an astronomical source using an aperture mask. UH88...

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Very Large Telescope

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three-telescope AMBER closure-phase instrument in 2005, the first imaging observations from the VLTI are expected soon. Deployment of the Phase Referenced Imaging...

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Western Apache language

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words. The closure for three alveolar stops is voiceless, as indicated by the absence of any energy in the spectrograms during the closure phase." There...

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Wound

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end goal of wound management is closure of the wound which can be achieved by primary closure, delayed primary closure, or healing by secondary intention...

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Design closure

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from concept phase to working chip. The complexity of the flow is a direct result of the addition and evolution of the list of design closure constraints...

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Wound healing

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affects the proliferative phase of healing. A single unit of alcohol causes a negative effect on re-epithelialization, wound closure, collagen production and...

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Minimum phase

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signal processing, a linear, time-invariant system is said to be minimum-phase if the system and its inverse are causal and stable. The most general causal...

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Caledonian orogeny

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it. The main phases of the Caledonian orogeny resulted from the convergence of Baltica, Laurentia and Avalonia which led to the closure of the Iapetus...

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Roger Clifton Jennison

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visibility phases in an interferometer when delay errors are present called the closure phase. He performed the first measurements of closure phase at optical...

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Construction of the Second Avenue Subway

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on the East Side of Manhattan, has been proposed since 1920. The first phase of the line, consisting of three stations on the Upper East Side, started...

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Swallowing

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the pharyngeal phase begins, other activities such as chewing, breathing, coughing and vomiting are concomitantly inhibited. 5) Closure of the nasopharynx...

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United States Naval Observatory Flagstaff Station

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flare stars. In 2007–2008, NRL with NOFS used NPOI to obtain first-ever closure phase image precursors of satellites orbiting in geostationary orbit. The...

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Project cycle management

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through definite and describable phases. Each phase can be brought to some sense of closure as the next phase begins. Phases can be made to result in deliverables...

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