# Astronomy and Astrophysics Advisory Committee; Notice of Meeting
In accordance with the Federal Advisory Committee Act (Pub. L. 92-463, as amended), the National Science Foundation (NSF) announces the following meeting:
*Name and Committee Code:* Astronomy and Astrophysics Advisory Committee (#13883) meeting ( *Teleconference* ).
*Date and Time:* October 23, 2017; 3:00 p.m.-4:00 p.m. EDT.
*Place:* National Science Foundation, 2415 Eisenhower Avenue, Alexandria, VA 22314 ( *Teleconference* ).
*Type of Meeting:* Open.
*http://www.nsf.gov/mps/ast/aaac.jsp*
*To join via Browser:*
*https://bluejeans.com/996692403/browser*
*To join via phone:*
(1) Dial:
+1.408.740.7256
+1.888.240.2560
+1.408.317.9253
(see all numbers— *http://bluejeans.com/numbers* )
(2) Enter Conference ID: 996692403
*Contact Person:* Dr. Christopher Davis, Program Director, Division of Astronomical Sciences, Suite W9136, National Science Foundation, 2415 Eisenhower Avenue, Alexandria, VA 22314; Telephone: 703-292-7165.
*Purpose of Meeting:* The AAAC commissioned a subcommittee to develop a concept for implementing a ground-based Cosmic Microwave Background Stage 4 experiment. The Conceptual Design Team (CDT) will take as input the community CMB-S4 Science Book and any further community information as appropriate, will consider the global landscape of CMB experiments, and provide a project strawman concept with options and alternatives. The purpose of the meeting is to discuss and accept the subcommittee report.
*Agenda:* To discuss and accept the CMB Stage 4 CDT Task Force Report on behalf of NSF and DOE.
Dated: September 27, 2017.
Crystal Robinson,
Committee Management Officer.