[U.S. National Science Foundation](https://www.nsf.gov)

Proposals accepted anytime

No specified limit; award size and duration vary by project and scope

Supports research on solar and terrestrial energy processes, including space weather, solar activity, and Sun-Earth interactions.

--- ## Description This program supports fundamental research on the processes by which energy in diverse forms is generated by the Sun, transported to the Earth, and ultimately deposited in the terrestrial environment. Key research topics include space weather impacts, helioseismology, the solar dynamo, solar activity cycles, magnetic flux emergence, solar flares and eruptive activity, coronal mass ejections, solar wind heating, solar energetic particles, interactions with cosmic rays, and solar wind/magnetosphere boundary problems. The program aims to advance understanding of the coupled Sun-Earth system and its broader impacts on geospace and terrestrial environments. --- ## Due Dates - Proposals are accepted at any time; there are no fixed deadlines. --- ## Funding Amount - There is no specified funding limit for proposals. - Award size and duration are determined based on the scope and scale of the proposed research. - Typical NSF research grants in this area range from one to five years in duration. --- ## Eligibility - Open to all categories of applicants (unrestricted), including: - Universities and colleges - Non-profit, non-academic organizations - For-profit organizations - State and local governments - Federal agencies (with some restrictions) - International organizations (as subawards or collaborative partners) --- ## Application Process - Proposals must be submitted in accordance with the [NSF Proposal & Award Policies & Procedures Guide (PAPPG)](https://www.nsf.gov/policies/pappg/24-1). - Submission is via [NSF FastLane](https://www.fastlane.nsf.gov/), [Research.gov](https://www.research.gov/), or [Grants.gov](https://www.grants.gov/search-results-detail/359307). - Carefully review the [program page](http://www.nsf.gov/funding/pgm_summ.jsp?pims_id=12741) for additional guidelines and requirements. - Proposals must address the scientific scope outlined in the program description. --- ## Additional Information - Indirect cost reimbursement is subject to NSF’s standard policies; see the [policy notice](https://www.nsf.gov/policies/document/indirect-cost-rate). - All proposals must comply with the current PAPPG and any relevant updates. - Awards made after October 1, 2024, are subject to updated NSF award conditions. --- ## External Links - [Program Information and FAQ](http://www.nsf.gov/funding/pgm_summ.jsp?pims_id=12741) - [NSF Proposal & Award Policies & Procedures Guide](https://www.nsf.gov/policies/pappg/24-1) - [Browse Recent Awards](https://www.nsf.gov/awardsearch/advancedSearchResult?ProgEleCode=152300&BooleanElement=Any&BooleanRef=Any&ActiveAwards=true#results) - [Related Programs](https://www.nsf.gov/geo/ags/about.jsp) - [Apply via Grants.gov](https://www.grants.gov/search-results-detail/359307) --- ## Contact Information | Name | Email | Phone | |-----------------|------------------------------|---------------| | Lisa M. Winter | [lwinter@nsf.gov](mailto:lwinter@nsf.gov) | (703) 292-8519 | | NSF Grants.gov Support | [grantsgovsupport@nsf.gov](mailto:grantsgovsupport@nsf.gov) | — |

Solar Terrestrial

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