The Global 3mm VLBI Array (GMVA)

by VLBA SUS — last modified May 27, 2020 by Emmanuel Momjian

Global 3mm VLBI (GMVA)

  • The GMVA observes at 3mm wavelength, using 8 VLBA stations, GBT, Effelsberg, Pico Veleta, Onsala, Metsaehovi, Yebes, and Korean VLBI Network (KVN) telescopes. (The VLBA stations in high-humidity locations at HN and SC are not equipped with 3mm receivers.)
  • The European part of the GMVA is coordinated by the Max-Planck-Institut für Radioastronomie (MPIfR), which hosts the main GMVA website. Proposal deadlines for the GMVA coincide with those for the VLBA alone, as described in Section  Proposal Preparation, Submission, & Review. Observations are block-scheduled in two sessions per year, typically in April-May and September-October, and correlated at the MPIfR in Bonn.
  • In GMVA observations, all telescopes operate at their highest possible bandwidth. Currently, this is a 4 Gbps data rate in all cases except at the KVN telescopes, which operate in a compatible 1 Gbps mode. The availability of NOEMA (Plateau de Bure) for GMVA Session II in 2020 and later sessions is not confirmed.
  • Proposals are submitted using the NRAO Proposal Submission Tool (PST).

  • Phased ALMA may be requested as part of the GMVA.  See the most recent Call for Proposals for how to request inclusion of ALMA in the array.  Currently, the "B" semester (February proposal deadline) is the time to submit GMVA proposals requesting phased ALMA, since a VLBI proposal submitted to the GMVA must also be submitted to ALMA directly (ALMA proposal deadline is usually in April).
  • Submission deadlines: Typically February 1, August 1, as for the VLBA/HSA, at 1700 Eastern Standard or Daylight Time. Check the Call for Proposals for more details.