closure phase


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closure phase

The sum of phases around a loop of baselines in an interferometer containing three or more elements. When applied to a radio interferometer, the sum is unaffected by phase drifts in the receivers or by variations in the ionosphere or troposphere above the telescopes and is therefore determined solely by the radio source under observation. The basic idea is used extensively in VLBI and in optical aperture-synthesis telescopes.
References in periodicals archive ?
The closure phase, which is the dissolution of the VE with the vanishing of opportunities, comprises of the termination of the contract and submitting the feedback report to the VE partner organizations.
The first phase was a crack closure phase, in which the axial stress displayed a nonlinear increase trend due to the closure of the cracks.
It is linked to the five domains of program management of the Project Management Institute, with an emphasis on program stakeholder engagement, and covers engagement in the program definition phase and how to identify stakeholders, garner their trust, build relationships through communication, and prepare the organization for change, followed by the project execution phase and how to drive engagement through performance metrics, meeting management, informal program governance, and office politics, and the program closure phase and the operational readiness review, including transition plans, new process documentation and training, new technology rollout, and cultural readiness assessment.
The project will be implemented over a period of five years, followed by a 30 month closure phase.
What made this project unique was the discipline of the project leader to execute on the project closure phase. This dedication to seeing the project through the steps of its final stage resulted in a satisfied and productive user base.
"We have found, since the first BRAC round, that we can get through phase one quite easily in an 18-month period." The closure phase can take from 18 months to 24 months.