Proposing

  • GBT Observer Alert

    Data Storage Work

    The Green Bank Observatory is in the process of expanding the storage capacity on one of our data storage machines. The work starts Monday, July 14 at 16:00 ET and will continue until all data is successfully restored. Data stored in the GBT Legacy Archive will be unavailable during this period.

    Read More …

Current Call for Proposals

  • The National Radio Astronomy Observatory/Green Bank Observatory (NRAO/GBO) Call for Proposals for the Semester 2026A will close on Wednesday, 30 July at 22:00 UTC (5:00 P.M. ET).

Additional Information

Useful Resources


Previous Calls for Proposals

In the posts below you will find information on previous proposal calls (in reverse-chronological order) including for each semester the proposal call results and a list of the science program.


View all past proposal calls



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