U.S. Department of Commerce/National Oceanic and Atmospheric Administration/OFA/AGFS/AMD -- OFA51, 1305 East West Highway -- Station 7604, Silver Spring, Maryland 20910

B -- SEA SURFACE SALINITY EXPERIMENTS SOL 97-3383 DUE 081497 POC Vivian Smith, 301/713-0853, Larry Frazier, 301/713-0851 B -- DESC: SEA SURFACE SALINITY EXPERIMENTS 97-3383 -- Research & Development DUE: 08/15/97 POC: Vivian Smith (301) 713-0853, Larry Frazier (301) 713-0851 NOAA/Science Center intends to negotiate on a sole source basis with Quadrant Engineering, Inc. for the utilization of NOAA's Scanning Low Frequency Microwave Radiometer (SLFMR). This work supports NOAA's responsibilities in the NOAA/ NASA/DOD National Polar-Orbiting Environmental Satellite System Program. The SLFMR was designed and built by Quadrant Engineering, Inc. and is one of a a kind instrument. A detailed knowledge of its engineering specifications is required in the SLFMR maintenance, calibration and operation. Theoretical items: (1) Identify parameters which significantly affect 1-band passive microwave measurements in the derivation of sea surface salinity measurements, (2) Find mathematical models which describe the effect that changes in these parameters have upon measured radiometric brightness temperature, (3) Describe these mathematical models using computer code, (4) Develop a salinity retrieval algorithm and (5) Perform simulations to determine how uncertainities in both the measured brightness temperature and in the estimates of other significant parameters will affect the sea surface. Experimental items: (1) Prepare SLFMR (L-band salinity mapper) for field experiments which include routine maintenance, system upgrades, and limited repairs if necessary. SLFMR upgrades may include: a. Airfoil repair, b. Interface SLFMR data acquisition to sensors for aircraft pitch and role, c. Data acquisition software changes, d. Data processing software changes and, e. Improving SLFMR thermal control. (2) Partifipcate in field experi- ments utilizing aircraft and shipboard measurements to meet task objectives. These include: a. Experiment planning, b. Arrange and pay for for SLFMR shipping and purchase of shipping insurance, c. Assist with operation of the SLFMR during experiments. Other offerors that have the ability to provide this type of service are invited to submit information as to their capa- bilities and any other pertinent data to the address above, to be received no later than 15 days after the date of this notice. No solicitation document exists; therefore a request for such document will not be considered. Award will be made under Simplified Acquisition Procedures. (Reference No. 7-3383). Vivian K. Smith (0216)

Loren Data Corp. http://www.ld.com (SYN# 0005 19970806\B-0001.SOL)