Astro2020 APC White Paper The DSA-2000 - A Radio Survey Camera Type of Activity: Ground-based project G. Hallinan 1 , V. Ravi 1 , S. Weinreb 1 , J. Kocz 1 , Y. Huang 1 , D. P. Woody 1 , J. Lamb 1 , L. D’Addario 1 , M. Catha 1 , J. Shi 1 , C. Law 1 , S. R. Kulkarni 1 , E. S. Phinney 1 , M. W. Eastwood 1 , K. L. Bouman 1 M. A. McLaughlin 2 , S. M. Ransom 2 , X. Siemens 2 , J. M. Cordes 2 , R. S. Lynch 2 , D. L. Kaplan 2 , S. Chatterjee 2 , J. Lazio 2 , A. Brazier 2 S. Bhatnagar 3 , S. T. Myers 3 , F. Walter 4,3 , B. M. Gaensler 5 1 DSA Collaboration 2 The NANOGrav Collaboration 3 NRAO, 1003 Lopezville Road, Socorro, NM 87801, USA 4 Max Planck Institute for Astronomy, K¨ onigstuhl 17, D-69117 Heidelberg, Germany 5 Dunlap Institute, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada Primary Contacts: Gregg Hallinan (gh@astro.caltech.edu), Vikram Ravi (vikram@caltech.edu) 1 arXiv:1907.07648v1 [astro-ph.IM] 17 Jul 2019