From NASA Solar System Workings Program description:
The NASA AVGR is a national facility funded by the NASA Science Mission Directorate to enable investigations of impact phenomena and processes. Exploratory or proof-of-concept programs requiring a limited number of experiments can be accommodated at no cost. More extensive programs are subject to review, to assess feasibility and cost effectiveness. Any need for extensive use of the AVGR should be explicitly described in the proposal. The proposal budget should include an estimate of usage costs. A letter of support from the AVGR is required. For more information, potential users of the AVGR should contact John Karcz (john.s.karcz@nasa.gov).
Cornelison, Charles J., Jon-Pierre Wiens, and Alfredo Perez. "Recent Upgrades for the NASA Ames Vertical Gun Range." Meeting of the Aeroballistic Range Association . No. ARC-E-DAA-TN58801. 2018.
AVGR LPSC Presentation (2016)