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

66 -- BROAD BAND TRI-AXIAL SEISMOMETERS AND HIGH RESOLUTION SEISMIC DATA ACQUISITION SYSTEMS DUE 060100 POC POC: Sandie Williamson, Contracting Officer, 303-236-5900, ext. 332 E-MAIL: USGS, CR, Acquisition & Federal Assistance, slwillia@usgs.gov. The United States Geological Survey, Albuquerque Seismological Laboratory, has a requirement for eleven STS-2 "High Gain" Tri-axial seismometers and eleven Six-channel high resolution seismic data acquisition systems Q4123GD-20/E8. Interested vendors are requested to give written notification (including telephone number for a point of contact) to the procuring office above within forty-five calendar days from the date of this synopsis, in accordance with the instruction below. The U.S. Geological Survey specifies the use of Streckeisen STS-2 seismometers and Quanterra Q4123GD-20/E8 high resoulution 24-bit seismic data acquisition systems. The seismomters and seismic data acquisition systems are required to have a demonstrated failure rate of less than 5% of units operting in field or observatory conditions over at least the past year. The Q4123GD-20/E8 Sample Rate is 32000Hz, simultaneous, user rates:1000, 500, 400, 250, 125, 200, 100, 50, 40, 25, 20, 10,1Hz; Resolution and Dynamic Range: LSB (Least Significant Bit)=2.34microvolts. 148 dB max. (+/-10,500,000 digital counts)Matched optimally to electronic broad-band force feedback sensors, e.g.STS-2; Bandwidth 0-0.8 Nyquist (-6dB point). Response controlled by digital FIR filter; Noise and Distortion: Terminated input noise level typical -142 dBrmsrel to Full Scale 0.25-50Hz. May exceed 146 dBrmsrel at sub-Hz frequencies and constant temperature; Full Scale +/-20V (40V p-p) differential inut; Storage: One 2.1Gb SCSI hard disk, mounted internally. One 2Gb DDS-format DAT tape. Data written in 4096-byte miniSEED records. The STS-2"High-Gain" Flat Velocity Response to Ground velocity between corners 8.33 mHz 9120 sec) and greater than 50 Hz and Electronic self-noise approx. 6 dB below USGS low-noise model between 5 mHz and 10 Hz. Noise Clip Level and Response Curves are available from the POC. Based on the information at this time and in accordance with 41 U.S.C. 253 (c)(1), implemented by FAR 6.302-1, the Government consideres the items specified as a sole source from Quanterra, Inc., Harvard, Massachusetts, 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 items (based on the criteria specified herein) are invited to submit in writing an affirmative response to this announcement. An affirmative resonse would include literature, brochures and such 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. See Note 22. Posted 04/14/00 (W-SN445374). (0105)

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