NASA Release of SOFIA Second Generation Instrument AO As you probably know, SOFIA has begun conducting science flights with the FORCAST mid-infrared camera and the GREAT heterodyne submillimeter spectrometer. Most recently SOFIA also successfully observed the occultation of a background star by Pluto with the HIPO instrument. Over the next two years we will continue to bring on line additional capabilities from the first generation suite of instruments. One of the great strengths of SOFIA, though, is the ability to bring on new instrumentation to reflect advances in technology. We are happy to call your attention to the release of a solicitation for Second Generation SOFIA Instrument Investigations. The solicitation will be an amendment to the NASA Announcement of Opportunity for Stand-Alone Missions of Opportunity (NNH08ZDA009O), and it can be found at the NSPIRES web site: http://nspires.nasaprs.com/ (select "Solicitations" then "Open Solicitations" then "NNH08ZDA009O") Date for Preproposal Teleconference: August 4, 2011 Due Date for Notice of Intent: August 15, 2011 Due Date for Proposals: 11:59 p.m. Eastern Time on October 7, 2011 Important information on the solicitation can also be found at the NASA Science Office of Mission Assessments: http://soma.larc.nasa.gov/SOFIA/ Please direct questions specifically regarding the NASA solicitation to Dr. Paul Hertz, NASA SOFIA Program Scientist, Science Mission Directorate, National Aeronautics and Space Administration, Washington, DC 20546; Tel.: (202) 358-0986; E-mail: paul.hertz@nasa.gov (subject line to read "SOFIA Instrument AO"). We hope that you will take advantage of this important opportunity, and we look forward to the science made possible by these investigations. Erick Young Director SOFIA Science Mission Operations Pam Marcum SOFIA Project Scientist