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This document amends a solicitation for proposals for the Geospace Dynamics Constellation program. NASA's Science Mission Directorate is seeking proposals for investigations as part of the Geospace Dynamics Constellation to advance understanding of fundamental geospace physics. The amendment extends the proposal due date to September 22, 2021 and the date of first instrument delivery to December 2025. It also extends the period for questions and comments regarding the solicitation to match the new proposal due date. Proposers should direct inquiries to the identified NASA program scientist by the specified deadline. Responses to questions will be posted on NASA's Geospace Dynamics Constellation Acquisition website.

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Geospace Dynamics Constellation Solicitation Amended on August 19

On August 19, 2021, the National Aeronautics and Space Administration (NASA) Science Mission Directorate (SMD) is amending the solicitation for Geospace Dynamics Constellation (GDC) Investigations. The GDC solicitation was released as Program Element Appendix (PEA) P of the Third Stand Alone Missions of Opportunity (SALMON-3) Announcement of Opportunity (AO). (Solicitation Number: NNH17ZDA004O-GDC)

This amendment extends the proposal due date to September 22, 2021 and the date of first instrument delivery to December 2025. This shift in the instrument deliveries keeps the time from investigation award to first flight unit delivery unchanged, and does not imply any other changes within the project schedule.

This extension does not permit the submission of new Notices of Intent. The extension does mean that the period for question/comments is extended per the rules given in the solicitation.

Comments and questions may be addressed by E-mail to the GDC Program Scientist Dr. Jared Leisner at jared.s.leisner@nasa.gov (subject line to read "GDC PEA").

Responses to all inquiries will be posted at the Questions and Answers (Q&As) location of the GDC Program Acquisition website at https://lws.larc.nasa.gov/gdc. The period for questions/comments will be extended to match the extension, and will be clarified in the amendment.

https://nspires.nasaprs.com/external/solicitations/summary!init.do?solId=%7b737CD031-F357-21F8-84FD-9305821299DF%7d&path=open mailto:jared.s.leisner@nasa.gov https://lws.larc.nasa.gov/gdc

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