US Department of Commerce/National Oceanic and Atmospheric Administration, Systems Acquisition Office, 8455 Colesville Road, Suite 705, Silver Spring, Maryland 20910

66 -- ASOS ICE FREE WIND SENSOR DUE 032495 POC Thomas D. Genovese, Jr., Contracting Officer, 301/427-2179. The NOAA Automated Surface Observing System (ASOS) program has a need for a ground-based sensor that will measure wind speed and direction specifically under icing conditions. The following are some of the requirements for the wind sensor. The wind speed portion of the wind system shall at a minimum meet the following specifications: a range of 0-125 knots; an accuracy of plus or minus 2 knots or plus or minus 5 percent of the range, whichever is greater; a resolution of 0.1 knot; a distance constant (Distance Constant equals Time (to reach 63 percent of new wind speed) times Wind Speed) less than or equal to 30 feet; and a starting threshold less than or equal to 2 knots. The wind direction portion of the wind system shall at a minimum meet the following specifications: an accuracy of plus or minus 5 degrees at wind speed of greater than or equal to 5 knots; a delay distance (Delay Distance equals Time (to reach 50 percent of new displacement) times Wind Speed) less than or equal to 12 feet; a resolution (0 to 359 degrees) to the nearest degree, and a dead band (Dead Band times transition point of potentiometer where no voltage is present or discontinuity indicated in wind direction output) with a maximum of 5 degrees. A ground-based sensor shall be capable of performing over a temperature range of minus 60F to plus 120F. The sensor shall be capable of performing under environmental conditions including freezing rain, freezing drizzle, snow, and pollutants. The sensor shall have a simple alignment to true north. The sensor shall not require preventive maintenance less than 90 days. The mean time between failures shall be less than or equal to 30,000 hours. The mean time to repair shall be less than or equal to 30 minutes. The Government is planning to test selected wind systems in the summer of 1995. Responsive vendors shall request a copy of the complete statement of work from the contact person no later than two (2) weeks after date of CBD issuance. (0062)

Loren Data Corp. http://www.ld.com (SYN# 0288 19950306\66-0016.SOL)