**Some programs are limited. Please read solicitations carefully and consult your Office of Research for specifics, such as limited applications through your university and internal application deadlines.**

The Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission is part of NASA's implementation of the National Academies of Sciences, Engineering and Medicine (NASEM) report, Thriving on Our Changing Planet: A Decadal Strategy for Earth Observations from Space released in early 2018 (herein referred to as the "Decadal Survey").

The National Aeronautics and Space Administration (NASA) is seeking proposals to support the post-launch validation of PACE science data products. Here, validation refers to performance assessment and ‘ground-truthing’ of the science data products produced by PACE to evaluate and reduce uncertainty in these products. The primary goal for this program element is the accumulation and/or collection of in situ or other fit- for-purpose data to validate ocean color, atmospheric aerosol, and/or cloud data products from PACE’s trio of instruments. The Ocean Color Instrument (OCI) is the primary instrument on the observatory and consists of two spectrometers that continuously span the ultraviolet to orange and orange to near-infrared spectral regions, with an additional seven discrete shortwave infrared bands. OCI is complemented by two small, multi-angle polarimeters, the Hyper-Angular Rainbow Polarimeter 2 (HARP2) and Spectro-polarimeter for Planetary Exploration (SPEXone), with spectral ranges that span the visible to near-infrared region.

Application Deadline: March 7, 2023 (preliminary proposals); May 5, 2023 (full proposals)