Observing > Call For Proposals > NRAO Call for Proposals: Semester 2023B


The National Radio Astronomy Observatory (NRAO) invites scientists to participate in the Semester 2023B Call for Proposals for the Karl G. Jansky Very Large Array (VLA) and the Very Long Baseline Array (VLBA), High Sensitivity Array (HSA), and Global mm VLBI Array (GMVA).

The submission deadline for Semester 2023B proposals is Wednesday, 1 February 2023, at 17:00 EST (22:00 UTC).

We would like to highlight a new opportunity for joint observations between ALMA and the VLA.  Please see Joint Proposals for more information.

We note that NRAO accepts Large Proposals that require at least 200 hours of observing time, and we particularly encourage the submission of Large Proposals for the VLBA. Please see the VLBA, HSA, and GVMA Proposal Guide for more information. 

Proposal preparation and submission are handled via the NRAO Proposal Submission Tool (PST) available at NRAO Interactive Services. Proposers who need assistance with proposal preparation or have questions regarding the Call for Proposals or NRAO telescope capabilities should contact Observatory staff via the NRAO Helpdesk. Note that using these tools (both the PST and the Helpdesk) requires registration.