The Biological and Physical Sciences Division of NASA's Science Mission Directorate (SMD) has released Appendix G of "Use of the NASA Physical Sciences Informatics System" (NRA NNH17ZTT001N). Appendix G  solicits proposals in six research areas: Biophysics, Combustion Science, Complex Fluids, Fluid Physics, Fundamental Physics, and Materials Science. Specifically, the Appendix solicits proposals that utilize data from 70 eligible investigations listed in Appendix G and on the PSI website.
Notices of Intent (recommended) for Appendix G are due by October 30, 2020.  Proposals are due by December 15, 2020.

Appendix G solicits proposals for ground-based research using experimental data from NASA's Physical Sciences Informatics (PSI) system (http://psi.nasa.gov). PSI is an online database of completed physical science reduced-gravity flight experiments conducted on the International Space Station (ISS), Space Shuttle flights, Free-flyers, commercial cargo flights to and from the ISS, or from related ground-based studies.

The direct link to the Appendix G webpage is https://go.nasa.gov/3hwnN6i. The direct link to the parent omnibus NRA is http://tinyurl.com/NRA-NNH17ZTT001N.