Habitable Worlds Observatory Instrument Concept Assessments in NASA Research Announcement (NRA): RESEARCH OPPORTUNITIES IN SPACE AND EARTH SCIENCES (ROSES) 2025
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The Habitable Worlds Observatory Instrument Concept Assessments (HWO-ICA) program, under solicitation NNH25ZDA001N-HWOICA, seeks proposals to mature the HWO mission concept by expanding the exploration of the instrument trade space. The program focuses on analyzing innovative instrument concepts based on scientific opportunity, engineering feasibility, technology maturity, and associated risks. It supports two categories of proposals for a nominal period of approximately two years: Category 1 for U.S.-based institution-led assessments and Category 2 for U.S.-based individuals participating in non-U.S. led programs. Notably, the program supports pre-formulation activities aligned with the HWO Technology Maturation Project Office but does not fund the development of flight hardware or support tools. Proposals are due by October 14, 2026, and must be submitted via the NSPIRES portal. Evaluation will be conducted using dual anonymous peer review. Selected proposals will be funded through firm-fixed-priced contracts or Interagency Agreements. A recent amendment clarifies that unfunded U.S.-based individuals involved in the proposed work may be included as Collaborators for Category 2 proposals. Questions regarding this opportunity are accepted until September 18, 2026, and should be directed to Megan Ansdell.
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Amendment #1 (09/03/2026): This Amendment adds the "2ndEmail" attachment which summarizes the following changes under ROSES-2025 Amendment 73: Section 3.3.2 has been updated regarding Collaborators on Category 2 proposals. It now allows that unfunded U.S.-based individuals involved in the proposed work may be included as Collaborators. New text is in bold in the ROSES Amendment 73. The due date remains unchanged: Proposals are due by October 14, 2026. In addition, the FAQ has also been updated. NASA will accept questions up until September 18, 2026.
The attached PDF file labeled “1stEmail” is text that the NASA Solicitation and Proposal Integrated Review and Evaluation System (NSPIRES) sent to Science Mission Directorate (SMD) List Serv subscribers. This “1stEmail” attachment announces the release of the full text for NNH25ZDA001N-HWOICA as well as summarizes key information from the full text.
Visit the link below labeled “NSPIRES page for NNH25ZDA001N-HWOICA” to download the full text. SMD may periodically clarify or amend the solicitation or add other supporting documents. Interested parties should regularly visit the HWOICA NSPIRES page to stay up-to-date on any such changes. In the event of a NASA funding lapse on or after 1 October 2026, please visit NSPIRES.
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