The panel accepts computing proposals from U.S. university researchers in the atmospheric and closely related sciences who are supported by the National Science Foundation (NSF). The CHAP recommends action with respect to a prospective user's request on the basis of the computational experimental design, computational effectiveness, and availability of computing resources.
CHAP members, most of whom are from the university community, are appointed to three-year terms by the CISL Director. Meetings are scheduled twice a year, usually in May and October. NSF's program coordinator for the NCAR and Facilities Section attends the semi-annual meetings and provides guidance from the NSF.