Timed Out or Disconnected

Because the OPT is a web application your work depends on a real-time connection to the NRAO data base. This has both advantages and disadvantages. One of the main disadvantages is that something may happen to the connection between your web browser and the NRAO data base.

 

Timed out (graceful disconnect)

For several reasons it is unwise to allow an unlimited continuous connection between your web browser and the NRAO data base; there will be a time interval of inactivity that triggers a time out. We have tried to keep this time interval large (currently four hours), but in the unfortunate event that a time out happens before you had a chance to exit properly (with FILE - SAVE ALL), the disconnect will be a graceful one. The software will automatically save unfinished editing of your project (etc.) or (re)source catalogs in an "Autosave:" copy. Reload the page or redirect your web browser to the login page and continue either with your copy of the unedited data (i.e., the situation at your last, probably deliberate, save operation) or with the copy of the edited data (the "Autosave:" copy).

 

Ungraceful disconnect (browser/computer crash)

We hope that we have properly implemented a similar situation for an unfortunate crash as for the time out. Depending on the nature of the crash, however, it may not be possible to recover from the disconnect as in the time out situation. Try to remember your steps and log in again; you may be pleasantly surprised and see an "Autosave:" copy of your recent work. No guarantees though.

Connect with NRAO

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

Founded in 1956, the NSF NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NSF NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NSF 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. NSF NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.

The U.S. National Science Foundation (U.S. NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."

AUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. We cultivate excellence, deliver value, enhance education, and engage the public.