Project Vela consisted of three elements: Vela Uniform to monitor seismic signals to detect underground nuclear testing, Vela Sierra to detect atmospheric nuclear testing and Vela Hotel to detect nuclear testing from space.
^C. M. Beyer, ‘History, Organization, and Funding of Project Vela: in Advanced Research Projects Agency. 'Project Vela: Proceedings of a Symposium: Report TR 6O-6/U, Department of Defense. Washington, D.C., October 1960, pp. 5-26.