DOC; Mountain Administrative Support Center; Acquisition Management Division; 325 Broadway MC3; Boulder, CO

R -- DATA COLLECTION SERVICE SOL NRMGC-702016DT POC Doris Turner, Purchasing Agent, (303) 497-3872; FAX: (303) 497-3163 E-MAIL: NOAA; MASC Acquisition Management, Joyce.J.Mills@noaa.gov. The National Oceanic & Atmospheric Administration (NOAA) proposes to negotiate on a sole source basis with the North Carolina State University, to provide follow on services in a thorough long term study to determine the variability of aerosol properties and additional ancillary measurements to develop a thorough understanding of the microphysical properties of the aerosols. This involves the collection of light-scattering data to be used in the interpretation of other measurements of visible, IR, and UV downwelling irradiance made at the Black Mountain and Mount Mitchell sites. The measurements will be used to determine the regional optical properties of aerosols and their variations, which will also lead to the design of a compact system that can be easily transported and deployed at other sites and flown on an aircraft platform as well. The measurements to be obtained are: a) broadband solar, IR, and UV irradiance from the Mt. Mitchell site and from a 30 ft. tower located about 1 km lower than the mountain site; b) diffuse and direct spectral solar irradiance in 5 bands ranging from approximately 400 to 1000 nm at both sites; c) light-scattering nephelometer measurements made from both sites where at least one of the sites includes measurements at three wavelengths and aerosol backscattering is measured concurrently as well; d) aerosol size distribution measurements at least at one of the sites; e) aerosol soot carbon content at one of the sites; f) winds, temperature, and humidity at both sites; g) spectral UV and total ozone column measurements made by a Brewer instrument at one of the sites and h) diffuse and direct spectral solar irradiance in 7 bands ranging from 300 to 370 nm at one of the sites. Requirements include: Analyze the light-scattering measurements for the interpretation of other measurements of visible, IR, and UV downwelling irradiance made at the two sites; analyze the other measurements to give a complete understanding of the climatological variations in the physical and chemical properties of the aerosols; oversee and maintain the operation of the two research sites; deliver the collected continuously-monitored light scattering data from the sites; data is to be made available for analysis as the data becomes available. Contingent upon the availability of government funds, five option years will be exercised. It is not the intent of the Government to issue a separate solicitation for this requirement. Interested sources proposing to supply an equivalent item must submit a written qualification statement by fax, clearly establishing capability to meet the above requirements within 15 days from the date of this synopsis. In the absence of other qualified sources, it is the intent of the government to negotiate a sole source contract under the authority of 41 U.S.C. 253 (c) (1) with North Carolina State University, Box 7514, Raleigh, NC 27695-7514 as this source is considered to be the only known qualified source which will satisfy agency requirements. (0126)

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