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Open Shared Risk Observing

NRAO has been offering "shared risk" access to the VLA for all users since the EVLA construction project began. The OSRO program has extended this into the EVLA era by providing early access to a number of EVLA correlator capabilities and observing modes that represent a significant improvement over the capabilities of the VLA correlator. They are described in detail in Performance of the EVLA. NRAO will make every effort to ensure projects awarded time under the OSRO program obtain good quality data. The highest risk will be for time-critical observations such as observations of triggered transients or observations coordinated with other observatories.

The National Radio Astronomy Observatory and Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

Founded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.

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The National Radio Astronomy Observatory and Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.