NASA/Goddard Space Flight Center Earth Sciences Procurement Office, Code 289 Greenbelt, MD 20771

A -- IN DEPENDENT VALIDATION OF ASSIMILATED DATA PRODUCED BY GEOS-DAS SOL RFP5-19630/269 POC Deanna O'Donnell, Procurement Technician, (301) 286-6937. This is a notice of intent to issue Request for Proposal (RFP5)- 19630/269 on a sole source basis to Atmospheric Environmental Research (AER), Incorporated, of Cambridge, MA. The proposed procurement is for the independent validation of the assimilated data fields produced by the Goddard Earth Observing System - Data Assimilation System (GEOS-DAS) of NASA/GSFC's Laboratory for Atmospheres. Tasks under this procurement will include: (a) Develop the methodology and requisite software needed to calculate the distortion representation of predictions from the GEOS-DAS, and validate the approach by testing it on synthetic cases, (b) Assess the distortion present in two-dimensional fields predicted from the GEOS-DAS, such as the 500 mb height field, and analyze the results by carrying out EOF analysis, and (c) Develop algorithms for assimilating geostationary water vapor imagery using the distortion representation of two-dimensional prediction errors, and test the algorithms using VAS 6.7 micron imagery. NASA/GSFC anticipates a cost-plus-fixed-fee (CPFF) contract with a period of performance of three years. AER, Inc. is uniquely qualified to perform the research, and has the methodology required to carry out the requirements. The statuatory authority for Other Than Full and Open Competition is 10 U.S.C. 2304(c)(1), Only One Responsible Source. Any other firms desiring consideration must fully identify their capability to provide these services in writing, or must submit a proposal within 15 days of the publication of this synopsis to NASA/ Goddard Space Flight Center, Attn: Ms. Deanna O'Donnell, Code 289, Greenbelt, MD 20771. See Numbered Note(s): 22. (0157)

Loren Data Corp. http://www.ld.com (SYN# 0004 19950607\A-0004.SOL)