U.S. Department of Commerce, Acquisition Services, 14th & Constitution Ave., NW, Room 6516, Washington, DC 20230

70 -- NCEP RESEARCH AND OPERATIONAL FORECAST MODEL CODES SOL 52-SANW-5-00140 POC Michael L. Palensky, Contract Specialist (202) 482-3599 The National Centers for Environmental Prediction (NCEP) of the National Oceanic and Atmospheric Administration, U.S. Department of Commerce, is developing a strategy for the redesign of its most important reserach and operational analysis/forecast model codes into versions that execute efficiently on highly parallel computer systems. The NCEP believes that these models have the potential to make effective use of the very high computational performance projected by the makers of scalable architecture supercomputers. The NCEP seeks suggestions and comments from potential vendors of such computers regarding redesign of these models to achieve high performance on a wide variety of highly parallel computer systems. To this end, the NCEP will provide codes to interested potential vendors to make them aware of the nature of the important application and to solicit input on how to modify the codes to achieve the objectives of performance and portability. These codes may be the basis for future benchmarks for procurements. Participating vendors are requested to provide written review and comments including suggested code and/or design modification. The NECP will respond to questions from recipients as appropriate and as resources permit. The codes to be provided are variants of existing atmospheric, finite-difference or spectral model production codes that execute efficiently on the Cray C90 in a multitasking mode. The codes are written in Cray Fortran (cf77), including Fortran 90 array syntax. These codes are to be used exclusively for the above mentioned purposes and are not intended for scientific studies. The code shall not be further distributed by the recipients. Interested vendors who wish to receive a copy of these model codes will be required to sign an agreement regarding the allowed use of the code and may be required to pay the Government a processing fee. The Government will provide brief description and the Cray Fortran codes, input data, samply output, together with the Cray Unicos scripts that were used to execute the models on th eCray C90 system at the NCEP. Interested sources should contact Mr. Michael Palensky on (202) 482-3599. This synopsis is for information and planning purposes only and does not constitute a solicitation for bids or proposals and is not to be construed as a commitment by the Government. The Government will not pay or reimburse recipients for any work that may be carried out by them as a part of this effort. (0226)

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