Loren Data Corp.

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COMMERCE BUSINESS DAILY ISSUE OF DECEMBER 20,1999 PSA#2499

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-0-00014 POC Annette E. Stevens, Contract Specialist, 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 gauge shall be linear over the entire measurement range, with an accuracy of plus or minus 4 percent or plus or minus 0.02 inch, whichever is greater, when compared to a standard National Weather Service 8-inch non-recording precipitation gauge installed at the standard height with a National Weather Service Alter shield.; (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 hardware failure, greater than or equal to 10,000 hours; (b) Mean time between erroneous or marginal reports, greater than or equal to 8,760 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. The Government strongly desires to not use any chemical compounds to retard evaporation, and gauges requiring such may be considered unacceptable. If the use of antifreeze is required for the gauge to comply with performance requirements during events containing solid precipitation, the mixture shall be a phosphate-free, propylene glycol (PG) which is "Generally Recognized as Safe" by the U.S. Food and Drug Administration. Vendors may request a copy of the complete statement of work (including design requirements) from the contact person within 14 days after CBD publication. Posted 12/16/99 (W-SN409256). (0350)

Loren Data Corp. http://www.ld.com (SYN# 0240 19991220\66-0005.SOL)


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