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

66 -- RADIOMETER SOL NRMGP000800656MB POC Michelle A. Bernal, 303-497-3983, Fax #303-497-3163 E-MAIL: NOAA; MASC Acquisition Management, bid.tech@noaa.gov. The National Oceanic & Atmospheric Administration (NOAA), Climate Monitoring and Diagnostics Laboratory (CMDL), proposes to negotiate on a sole source basis contract under the authority of 41 U.S.C. 253(c)(1) with The Eppley Laboratory of Newport, Rhode Island for two electrically calibrated cavity radiometers for continuous deployment at remote monitoring sites. The radiometers will be used for highly accurate determination of the solar direct beam irradiance, and are to be equipped with calcium fluoride windows which have a relevant spectral transmission range of approximately 0.25 to 9 microns. The cavities must be fully characterized for stray light correction, cavity absorptivity, electrical non-equivalency and precision aperture area. The field of view must conform to currently used NOAA/CMDL cavity radiometers which have a central FOV of five degrees, with a slope angle of 0.8 degrees, with the calcium fluoride window installed. The cavities must incorporate internal heaters which maintain the cavity receivers at user selectable temperatures (0 to 35 Celsius) regulated to plus or minus two hundredths degree Celsius. The cavities must operate on the absolute scale and have a WRR correction factor traceable to the World Radiometric Reference (WRR) as currently maintained in at the World Radiation Center in Davos Switzerland. The cavity design must have a demonstrated history of accuracy in reproducing the absolute scale of irradiance and exhibit high precision historic ratios to the WRR which in current practice with present NOAA cavity radiometers, is plus or minus three hundredths percent over time periods of decades. Irradiance measurement and electrical calibration methodology and performance for the cavities must be compatible with current NOAA/CMDL radiometers of the Eppley HF design to enable compatibility with current NOAA/CMDL software, computer and data acquisition environments which are based upon the HP34970A system, 34901A MUX card, the 34903A actuator card and the 34907A multipurpose card. The cavities and data acquisition systems must be capable of continuous operation at data sampling rates of at least 1 Hz with a measurement resolution of 100 nanovolts with option for averaging over a user selectable number of power line cycles. Control capability for external auto shuttering of the cavity window is required for optional user installed cavity window protection devices. This procurement is being conducted per FAR Part 13, Simplified Acquisition Procedures. This synopsis is issued for information only. No competitive solicitation is planned. Information submitted in response to this notice will be used solely to determine whether or not use of competitive procedures to fulfill this requirement would be in the Government's best interest and must address qualifications pertinent to this requirement. Terms and Conditions and agency level protest procedures can be found on web site http: netsite.esa.doc.gov/oam/conops/#REFERENCE. Hard copy in full text available from office address and phone number listed in notice. Anticipated award date will be July 14, 1998. Posted 06/29/98 (0180)

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