Proposals may only be submitted by the following: - Proposals may only be submitted by the following: <ul> <li>Institutions of Higher Education (IHEs)Two-and four-year IHEs (including community colleges) accredited in, and having a campus located in the U.S., acting on behalf of their faculty members.</li> <li>Non-profit, Non-Academic OrganizationsIndependent museums, observatories, researc...