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

B -- DATA PRODUCTS FROM REALTIME GLOBAL AREA COVERAGE (GAC) MEASUREMENTS SOL RFQ902-72660-902 DUE 041798 POC Deborah A. Bittner, Contract Specialist, Phone (301) 286-5387, Fax (301) 286-1739, 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#RFQ902-72660-902. E-MAIL: Deborah A. Bittner, Deborah.A.Bittner.1@gsfc.nasa.gov. NASA/GSFC plans to issue a Request for Quote (RFQ) for specific data products using the realtime Global Are Coverage (GAC) measurements from the currently operational AVHRR instrumentation. As part of this effort, the raw GAC data will be transformed into useful geophysical quantities available as both research-quality products as well as online images suitable for browsing on the World Wide Web. Requirements listed deal primarily with the AVHRR level 1B GAC data. PRODUCT TYPES: Two types of products generated from the realtimre AVHRR GAC data: (1) full resolution data products containing geophysical parameters derived from the 5 AVHRR channels, and (2) image products (e.g. GIFs) which are displayable online via WWW based browser. TEMPORAL COVERAGE: Near realtime AVHRR GAC data, defined as that set of 14 passes per day received with no more than a 36 hour lag measured from the last pass of the day. These passes are to be used in the construction of near-realtime daily, 10-day, and monthly global composites. SPATIAL COVERAGE: Global, which will consist of mosaics comprised of the orbital swaths. Since there will be both ascending and descending AVHRR passes, a total of 2 data products per parameter will be required for those parameters which can be determined during both the daylight and nighttime portions of the orbits. SPATIAL RESOLUTION: The origianl GAC spatial resolution (i.e. 4km) for the data products, and 16 km for the corresponding browse images. GEOPHYSICAL PARAMETERS: Surface temperature, normalized difference vegetation index (NDVI) and cloud identification. It is expected that state-of-the-art retrievel techniques will be used in the determination of the requested geophysical parameters, with some qualitative and/or quantitative measure of accuracy or uncertainties accompanying the data products. GEOLOCATION: Registration required within hal a pixel. FORMAT: IEEE binary format for the geophysical data products stored as a regular array, and 8 bit GIF format for the online image products. PROJECTION: Any projection which preserves the inherent resolution of the data, is will-suited to global as opposed to regional domains, and can be easily interpreted by the users of the data. COMPRESSION: Simple compression (l-Z or gzip) for data files; browse image files should remain uncompressed. SUPPORT SOFTWARE: Basic real programs in Fortran, C and IDL to read/visualize the data files, accompanied by sufficient documentation including installation guide for multiple platforms and a makefile. DOCUMENTATION: README-type documentation for the GAC data and images which follows DAAC standards. Further detailed Statement of Work will be supplied with the RFQ package. This procurement is being conducted under the Simplified Acquisition Procedures (SAP). The Government intends to acquire a commercial item using FAR PART 12. The DPAS Rating for this procurment is DO C9. The anticipated release date of RFQ 902-72660 is on or about 3-31-98 with an anticipated quote due date of on or about 4-17-98. All qualified responsible sources may submit a quote which shall be considered by the agency. An ombudsman has been appointed -- See Internet Note "B". Prospective offerors shall notify this office of their intent to submit an offer. It is the offeror's responsibility to monitor this site for the release of the solicitation and amendments (if any). Any referenced notes can be viewed at the following URL: http://genesis.gsfc.nasa.gov/nnotes.htm. (0075)

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