Subject: C.3 Solar System Workings and C.12 Planetary Instrument Concepts for the Advancement of Solar System Observations (PICASSO) Budget Correction.

The Solar System Workings (SSW) program element supports research into atmospheric, climatological, dynamical, geologic, geophysical, and geochemical processes occurring on planetary bodies, satellites, and other minor bodies (including rings) in the Solar System. This call seeks to address the physical and chemical processes that affect the surfaces, interiors, atmospheres, exospheres, and magnetospheres of planetary bodies.

The goal of C.12 The Planetary Instrument Concepts for the Advancement of Solar System Observations (PICASSO) program is to support the development of spacecraft-based instrument components and systems that would enhance or enable the scientific return from future planetary missions that support the Planetary Science Division. Therefore, the proposed instrument component or system must address specific scientific objectives of likely future planetary science missions.

For both C.3 Solar System Workings and C.12 Planetary Instrument Concepts for the Advancement of Solar System Observations, corrections have been made to the expected program budget for first year of new awards and number of new awards. New text is in bold and deleted text is struck through. The due dates for proposals remain unchanged.

Questions regarding C.3 Solar System Workings may be directed to Delia Santiago-Materese at hq-ssw@mail.nasa.gov. Questions regarding C.12 Planetary Instrument Concepts for the Advancement of Solar System Observations may be directed to Catherine Walker at catherine.c.walker@nasa.gov.