The U.S. National Science Foundation (NSF) is offering a grant opportunity titled "Geospace Facilities," aimed at promoting basic research on the structure and dynamics of the Earth's upper atmosphere. This initiative supports four large incoherent-scatter radar facilities and the SuperDARN coherent scatter radar system, which are strategically located from Greenland to Peru and are equipped with advanced optical diagnostic instruments. The research facilitated by these facilities is closely linked to the NSF's Aeronomy and Magnetospheric Physics Programs, underscoring their significance in advancing scientific understanding in these fields. Proposals for this grant can be submitted at any time, with no cost-sharing or matching requirements, and interested applicants can reach out to NSF grants.gov support at grantsgovsupport@nsf.gov for assistance or further information, including details available at the NSF's program description link.