NASA/Headquarters Acquisition Division, Code CW, 300E Street SW, Washington, DC 20546

A -- ATMOSPHERIC EFFECTS OF AVIATION PROJECT, NRA-97-OASTT-01 SOL NRA-97-OASTT-01 DUE 090897 POC Richard J. Lawrence, Senior Engineer, Phone (301) 286-1022, Fax (301) 555-5555, Email Richard.J.Lawrence.1@gsfc.nasa.gov WEB: Click here for the latest information about this notice, http://procurement.nasa.gov/EPS/HQ/date.html#NRA-97-OASTT-01. E-MAIL: Richard J. Lawrence, Richard.J.Lawrence.1@gsfc.nasa.gov. NASA/HQ plans to issue a NASA Research Announcement (NRA) for science investigations directed at improving the understanding of, and ability to predict, the atmospheric effects of subsonic aviation at cruise altitudes. The selected investigations will be conducted as part of the ongoing effort by the Subsonic Assessment (SASS) element of NASA's Atmospheric Effects of Aviation Project (AEAP) to assess the atmospheric impact of subsonic aviation -- in particular, commercial aircraft cruise emissions. The SASS effort is sponsored by the Advanced Subsonic Technical Program within the NASA Office of Aeronautics and Space Transportation Technology. New proposals, as well as renewal proposals for expiring tasks, are desired for all of these areas. This solicitation is open to all categories of organizations, foreign or domestic. This NRA will be available electronically, on the release date, via the internet at the Atmospheric Effects of Aviation "Home Page" at <http://hyperion.gsfc.nasa.gov/AEAP&;gt; under NRA 97-OASTT-01. A paper copy will be available to those who do not have access to the internet by calling (202) 358-0833 and leaving a voice mail message. This announcement will be open for the period from July 10, 1997, through September 8, 1997, and proposals may be submitted at any time during that period. An ombudsman has been appointed -- See Note "B". (0178)

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