NOAA/Systems Acquisition Office (SAO), 1315 E. W. Highway, Mail Code SAOX2, Silver Spring, MD 20910

66 -- ALL-WEATHER PRECIPITATION ACCUMULATION GAUGE SOL 52-SPNA-8-00001 DUE 102097 POC Thomas D. Genovese, Jr., Contracting Officer, (301-713-2110) The NOAA Automated Surface Observing System (ASOS) program has a need for an All-Weather, Liquid and Frozen Precipitation Water Equivalent Accumulation Gauge. An alternative to tipping bucket technology is sought which meets the following performance requirements: (1) Range (i.e., measuring capacity) greater than or equal to 40 inches (mandatory), liquid water equivalent, unattended (without user intervention); (2) Reporting Resolution of 0.01 inch. (3) The accuracy of the gauge shall be linear over the entire measurement range of temperature and wind, and shall meet the following requirements for all precipitation rates (R): Accuracy of plus or minus 4 percent or plus or minus 0.02 inch, comparisons will be made on hourly accumulations and event accumulations; (4) The gauge shall not report any change in accumulation in the absence of precipitation. (5) The gauge shall be fully compliant with accuracy requirements over the following operational temperature limits: (a) low temperature operational, minus 60 degrees F; (b) high temperature operational, plus 120 degrees F. Furthermore, the gauge shall survive exposure to the following temperature extremes with no damage: (c) low temperature withstanding, minus 80 degrees F; (d) high temperature withstanding, plus 130 degrees F. (6) The gauge shall be fully compliant with accuracy requirements over the following operational wind limits: (a) Operational steady wind, up to 30 knots; (b) Operational wind gust, up to 46 knots. Furthermore, the gauge shall survive exposure to the following wind extremes with no damage: (c) Withstanding steady wind, up to 73 knots; (d) Withstanding wind gust, up to 125 knots. (7) Reliability, Maintainability, and Availability: (a) Mean Time Between Failure, greater than or equal to 4,392 hours; (b) Periodic Maintenance interval, not less than 90 days; (c) Mean Time to Repair, less than or equal to 30 minutes; (d) Availability greater than or equal to .9998861. Vendors may request a copy of the complete statement of work (including design requirements) from the contact person within 2 weeks of CBD issuance and should respond within 6 weeks of CBD issuance. (0269)

Loren Data Corp. http://www.ld.com (SYN# 0215 19970930\66-0021.SOL)