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

66 -- METEOROLOGICAL PARTICLE SENSOR (MPS) DUE 060200 POC Donald M. Thompson, Contracting Officer (301) 713-2110 ext 116 The NOAA Automated Surface Observing System (ASOS) program has a need for a commercial-off-the-shelf instrument, Meteorological Particle Sensor (MPS), capable of measuring precipitation particle sizes of falling liquid precipitation (drizzle). The instrument and associated equipment shall be suitable for installation in an outdoor environment with weather- tight enclosures, cables, and sensing elements. The ground-based instrument shall be capable of measuring particle sizes from 50 to 1000 microns in diameter. Additionally, the sensor shall measure the number density of particle sizes from 50 to 1000 microns in diameter. The sensor shall have a 50-micron particle size resolution and shall operate in precipitation rates up to 15 millimeters per hour. The sensor shall be capable of measuring drops consistently with wind speeds up to 15 meters per second. The Government desires to determine liquid water accumulation from these particles, with a one-minute temporal resolution. The instrument shall operateon single phase commercial power. The Government intends to purchase up to two commercial sensors which can meet the NWS MPS requirement. Vendors may request a copy of the complete MPS requirement from the contact person within two weeks of CBD issuance and should respond within four weeks of CBD issuance. Interested parties should send a sensor descriptive package (including a brochure) and a request for the MPS requirement to Annette E. Stevens, 1325 East-West Highway, Mail Code SAOx2, Workstation 4349, Silver Spring, Maryland 20910, labeled "ASOS Meteorological Particle Sensor." Posted 05/18/00 (W-SN456270). (0139)

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