NASA/Goddard Space Flight Center, Code 219, Greenbelt, MD 20771

H -- AVIATION EFFECTS STUDIES IN THE UPPER ATMOSPHERE SOL 916-28325-0000-902 DUE 073099 POC Deborah A. Bittner, Contract Specialist, Phone (301) 614-5609, Fax (301) 614-5619, Email Deborah.A.Bittner.1@gsfc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/GSFC/date.html#916-28325-0000-902. E-MAIL: Deborah A. Bittner, Deborah.A.Bittner.1@gsfc.nasa.gov. NASA/GSFC plans to issue a Request for Quotation (RFQ) to support research of aviation effects studies in the upper atmosphere. The 3D Global Chemical Transport Model (CTM) employs chemical, radiation and transport theory to model and analyze data associated with the amount and distribution of trace chemicals in the Earth's stratosphere that may affect climate change and changes to the Earth's ozone layer. The current task will involve 1) an updated J-value database based on the Applied Physics Lab radiative transfer model and in accordance with recent recommendations in JPL chemical kinetics and photochemical datasets; 2) development of an upper troposhere photochemistry box model, and; 3) a preliminary study to consider cloud effects in the radiative transfer database to be coupled with an upper troposphere chemistry module for the CTM. These tasks will contribute to an augmented CTM which will allow application to EOS chem data analysis and support to aviation effects in the upper troposphere. This procurement is being conducted under the Simplified Acquisition Procedures (SAP). NASA/GSFC intends to purchase the items from Johns Hopkins University, Applied Physics Lab, Laurel, MD. The Johns Hopkins Applied Physics Lab (APL) atmospheric modeling group has provided a J-value database for use by the Goddard 3D Chemical Transport Model (CTM). The CTM is a crucial element for planning and execution of the NASA solve campaign during the next year. APL has demonstrated the ability to deliver the required products in a form easily incorporated into the CTM model, utilizing APL software already reviewed the the CTM team. APL is the only organization that can respond to the immediate need for the CTM changes. The Government intends to acquire a commercial item using FAR Part 12. Interested firms have 15 days from the publication of this synopsis to submit in writing to the identified point of contact, their qualifications/capabilities. Such qualifications/capabilities will be used solely for the purpose of determining whether or not to conduct this procurement on a competitive basis. Responses received after the 15 days or without the required information will be considered nonresponsive to the synopsis and will not be considered. A determination by the Government to not compete this proposed effort on a full and open competitive basis, based upon responses to this notice is solely within the discretion of the Government. Oral communications are not acceptable in response to this notice. Please mail or fax your responses to this solicitation. All responsible sources may submit an offer which shall be considered by the agency. An Ombudsman has been appointed. See Internet Note "B". Any referenced notes can be viewed at the following URL: http://genesis.gsfc.nasa.gov/nasanote.html Posted 06/21/99 (D-SN345242). (0172)

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