Status Report

NASA SIMPLEx (PEA-J of SALMON-3) Closed, 2020 Solicitation Anticipated

By SpaceRef Editor
July 16, 2019
Filed under ,

Amendment 16 to SALMON-3 Closes PEA J: Small Innovative Missions for Planetary Exploration (SIMPLEx).


With this amendment, the National Aeronautics and Space Administration (NASA) Science Mission Directorate (SMD) Announcement of Opportunity (AO) NNH17ZDA004O, “Third Stand Alone Missions of Opportunity Notice (SALMON-3),” is amended to close PEA-J, SIMPLEx.

In 2018 via PEA J of SALMON-3 NASA solicited and received proposals for Small Innovative Missions for Planetary Exploration (SIMPLEx): investigations in which a secondary payload small spacecraft is built and deployed from a primary spacecraft mission, for acquisition of science data, analysis, publication of scientific results, and delivery of the data to an appropriate NASA archive. The projects selected will be posted on the NSPIRES page for SIMPLEx.


PEA J of SALMON-3 was presented as an open call, allowing for proposals to be submitted at any time. However, SIMPLEx, PEA J of SALMON-3 is now closed. It is anticipated that another SIMPLEx opportunity will be solicited in 2020. When the next SIMPLEx opportunity is released, it will have a new (letter) designation. It is anticipated that the next SIMPLEx proposal due date will be no earlier than June 2020 and no fewer than 90 days after release of the text. New flight opportunities, consistent with the due date, will be identified at the time of release. Lessons learned may result in minor changes to the solicitation.


On or about July 16, 2019, PEA J will be moved to Closed/Past Selected and this Amendment to the NASA SALMON-3 AO PEA J (NNH17ZDA004O-SIMPLEX) will be posted on the NASA research opportunity web site


Questions regarding SIMPLEx may be addressed to Ms. Doris Daou at

SpaceRef staff editor.