NASA, Johnson Space Center, BE13, Houston, TX 77058

A -- PROCUREMENT FOR AN AIR-BORNE OR SPACE-BORNE PHASED ARRAY OR SWITCHED BEAM ANTENNA SYSTEM, AMENDMENT 1 SOL 9-BE13-95-6-53P DUE 072696 POC Contract Specialist: Ann S. Sullivan, (713) 483-1863 Contract Officer: Ann S. Sullivan, (713) 483-1863 THIS IS A SOURCES SOUGHT SYNOPSIS ONLY AND NO IMMEDIATE PROCURE- MENT OR RFP IS ANTICIPATED FOR ABOUT 1 YEAR. AMENDMENT 1, Extends submission date and deletes Ombudsman statement. NASA Johnson Space Center is seeking information on available, off-the-shelf air-borne or space-borne Ku- and Ka-Band phased array or switched-beam antenna systems. A phased array antenna is being considered for communications from a spacecraft in low earth orbit to the Tracking & Data Relay Satellite (TDRSS) in geosynchronous orbit. The desired antenna is low-profile and suitable for flush-mounting or conformal-mounting to the exterior of the spacecraft. An antenna must provide an EIRP (effective isotropic radiated power of 49 dBW at Ku-band and 54 dBW at Ka-Band, and a G/T (gain-to-temperature ratio) of 0 dB/deg K at Ku-band and 4 dB/deg K at Ka-band. The antenna must meet the above requirements over a field of view of +/-70 degrees in one plane and +/-50 degrees in the perpendicular plane. High-grade commercial or Military Grade B parts are acceptable for this hardware (S-level parts are not required). Vendors who have existing designs or an existing product which is compatible with or easily adaptable to these requirements are preferred. INTERESTED PARTIES WITH THE QUALIFICATIONS NECESSARY TO MEET THE REQUIREMENTS OF THIS PROCUREMENT SHOULD SUBMIT INFORMATION DETAIL- ING RELATED CAPABILITIES TO: NASA Johnson Space Center, Attn: EV3/T. W. Early, Houston, TX 77058. Telephone Number (713) 483-1461; E-Mail address: tearly@GP905.jsc.nasa.gov. Responses must be received at the above address no later than 4:30 pm local time, September 13, 1996. All responsible sources may submit information which shall be considered by the agency. The solicitation and any documents related to this procurement will be available over the Internet. These documents will be in RTF format and will reside on a World-Wide Web (WWW) server, which may be accessed using client browsers, such as, MOSAIC or NETSCAPE. The WWW address, or URL, of the JSC Procurement home page is: ''http://www.jsc.nasa.gov/bd2/'' It is the offeror's responsibility to monitor this site for solicitation release. Potential offerors will be responsible for downloading their own copy of the solicitation. The closing date shall be the same as the solicitation released on the Internet. If there are any questions, the contract specialist may be contacted via E-mail at ann.s.sullivan@jsc.nasa.gov or by phone at (713) 483-1863 or the contracting officer may be contacted via E-mail at ann.s.sullivan@jsc.nasa.gov or by phone at (713) 483-1863. (0235)

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