U.S. Geological Survey, Branch Of Acquisition and Federal Assistance, Box 25046, Denver Federal Center, Denver, CO 80225-0046

D -- BROADBAND SEISMIC STATIONS SOL 98CRQQ1001 DUE 041598 POC Marilyn Hutchison, MS204B, (303) 236-5900 X327 E-MAIL: USGS, CR, Acquisitions & Federal Assistance, mhutchi@usgs.gov. Concerns having the ability to furnish the supplies and services described herein are requested to give written notification (including the telephone number for a point of contact) to the procuring office above within forty-five (45) calendar days from the date of this synopsis. Salient characteristics: The United States Geological Survey (USGS), in cooperation with the regional seismic networks in New England and South Carolina, has a requirement for two new broadband seismic stations, to be operated and maintained by the USGS as part of the cooperative United States National Seismograph Network (USNSN). These stations will have similar design specifications to existing seismic stations within the USNSN, which include high-fidelity digital acquisition systems, very broadband seismometers, and real-time satellite communications. The purpose of these stations is to improve the Nation's recording capabilities in earthquake-prone areas of the eastern United States by providing high-quality recordings of significant local earthquakes. Data from these stations will be integrated with real-time data from other USNSN stations for global and national monitoring of earthquakes. Data from these stations will also be transmitted to regional networks centers in the eastern United States for local earthquake monitoring purposes. These stations require broadband seismometers that meet the USNSN specifications of being below the Low Noise Model (LNM) of the Earth between 10 and 0.03 Hz and with a useable pass band between 30 Hz and 0.005 Hz (<LNM+10db). The sensors must also meet the following specifications: 1) Standard USNSN response; 2) Flat acceleration between 0.005 and 0.03 Hz; 3) Flat velocity to 0.03 to 50 Hz; 4) Calibration enable (+5V); 5) Re-centering logic mass position adjustment (+5V enable); 6) USNSN standard calibration resistor (636 K-OHM); 7) +20V differential signal out; 8) 145 dB linear dynamic range in the pass band (10-0.03 Hz); 9) -105 dB IHD; 10) -60dB cross axis coupling; 11) Separate tranducer housing and feedback electronics. Based on information available at this time, and in accordance with 41 U.S.C. 253(c)(1), implemented by FAR 6.302-1, the Government considers the item specified as a sole source from Digital Technology Associates, Concord, California, and proposes to negotiate a contract with that firm on that basis. However, should additional sources be identified, they will be considered. Firms who feel that they can furnish the required item or its functional equivalent (based upon the criteria specified herein) are invited to submit in writing an affirmative response to this announcement. An affirmative response would include literature, brochures and such other materials which correspond to the required items stated herein. This information will be evaluated and used to determine if competitive opportunities exist. Since no solicitation document exists, requests for such documents without accompanying information will be considered non-responsive to this request without further consideration. This notice may represent the Government's only official notice of this procurement. See Note 22. (0057)

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