NASA/Lyndon B. Johnson Space Center, Houston Texas, 77058-3696, Mail Code: BE

58 -- X-38 ANTENNA SYSTEM SOL 9-BE13-44-8-42P POC Eric W. Lewis, Contract Specialist, Phone (281) 483-0575, Fax (281) 244-5331, Email eric.w.lewis1@jsc.nasa.gov -- Yolande B. Harden, Contracting Officer, Phone (281) 483-9953, Fax (281) 244-5337, Email yolande.b.harden1@jsc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/JSC/date.html#9-BE13-44-8-42P. E-MAIL: Eric W. Lewis, eric.w.lewis1@jsc.nasa.gov. NASA/JSC plans to issue a Request for Offer (RFO) for the procurement of the antennas for corresponding multiple RF systems in conjunction with the X-38 project. All antennas will be mounted on composite skin, under thermal protection system of the X-38 V-201 vehicle where space is limited. V-201 is a re-entry space test vehicle and the antennas must operate over the specified temperature range. The types of antennas to be procured include: S-Band; GPS; UHF; Radar Altimeter; ATC and SARSAT. S-band Antennas NASA/JSC has a requirement for 8 space-qualified omni-directional S-Band antennas operating from 2.0 to 2.3 GHz for March 1999 delivery. The antennas shall have 6 MHz bandwidth for each of the frequencies in the table below: X-38 TDRSS Channel Assignment X-38 TDRSS Channel Assignment Channel Transmit (MHz) Receive (MHz) XPDR 1 2235 2058.06 XPDR 2 2240 2062.67 Four flight antennas will be mounted on the vehicle. Environmental requirements include -80 0F to +209 0F operating temperature and 40 g s design load limit. The physical requirements include the envelope of =" height and 4" x 4" area and with a mass to area ratio greater than 5.0 lb/ft2. The free space antenna performance requirements include circular polarization, at least 0 dBic antenna gain, less than 5 dB axial ratio for +/- 60 degree beamwidth from boresight, and capable of handling more than 25 Watts power. GPS Antennas NASA/JSC has a requirement for 25 space-qualified omni-directional GPS antennas operating at 1575 MHz with the first 8 to be delivered in January 1999 or sooner (to support testbed activities) and the other 17 to be delivered in March 1999. Eight flight antennas will be mounted on the vehicle. Environmental requirements include -80 0F to +217 0F operating temperature and 40 g s design load limit. The physical requirements include the envelope of =" height and 2.5" x 2.5" area and with a mass to area ratio greater than 5.0 lb/ft2. The free space antenna performance requirements include circular polarization, at least 0 dBic antenna gain, and less than 5 dB axial ratio for +/- 74 degree beamwidth from boresight and a phase angle stability of less than 5: at boresight. UHF Antennas NASA/JSC has a requirement for 8 space-qualified omni-directional UHF antennas operating in 420-470 MHz band (exact transmit and receive center frequencies will be determined at the onset of the contract)for March 1999 delivery. Four flight antennas will be mounted on the vehicle. Environmental requirements include -80 0F to +209 0F operating temperature and 40 g s design load limit. The physical requirements include the envelope of =" height and 2.5" x 2.5" area and with a mass to area ratio greater than 5.0 lb/ft2. The free space antenna performance requirements are linear polarization, at least -5 dB antenna gain, and a +/- 80 degree beamwidth from boresight. Radar Altimeter Antennas NASA/JSC has a requirement for 8 space-qualified omni-directional Radar Altimeter antennas operating at 4300 MHz for a March 1999 delivery. Four flight antennas will be mounted on the vehicle. Environmental requirements include -80 0F to +193 0F operating temperature and 40 g s design load limit. The physical requirements include the envelope of =" height and 2.5" x 2.5" area and with a mass to area ratio greater than 5.0 lb/ft2. The free space antenna performance requirements are linear polarization, at least 5.0 dB peak antenna gain, a +/- 50 degree beamwidth from boresight, and capable of handling more than 5 Watts average and 500 Watts peak power. ATC Antennas NASA/JSC has a requirement for 4 space-qualified omni-directional Air Traffic Control (ATC) antennas operating at center frequencies of 1090 MHz and 1030 MHz for March 1999 delivery. Two antennas will be mounted on the vehicle. Environmental requirements include -80 0F to +183 0F operating temperature and 40 g s design load limit. The physical requirements include the envelope of =" height and 2.5" x 2.5" area and with a mass to area ratio greater than 5.0 lb/ft2. The free space antenna performance requirements are linear polarization, at least -5 dB antenna gain, a +/- 80 degree beamwidth from boresight, and capable of handling more than 10 Watts average and 1000 Watts peak power. SARSAT Antennas NASA/JSC has a requirement for 4 space-qualified omni-directional Search and Rescue Satellite (SARSAT) antennas operating at both center frequencies of 121.5 MHz and 406 MHz for March 1999 delivery. Two antennas will be mounted on the vehicle. Environmental requirements include -80 0F to +150 0F operating temperature and 40 g s design load limit. The physical requirements include the envelope of =" height and 2.5" x 2.5" area and with a mass to area ratio greater than 5.0 lb/ft2. The free space antenna performance requirements are linear polarization, at least -- -5 dB antenna gain, a and +/- 80 degree beamwidth from boresight. The Government intends to acquire a commercial item using FAR Part 12. See Note 26. The SIC Code and Size Standard are 3669 and 750 employees, respectively. The DPAS Rating for this procurement is DO-C9. All qualified, responsible sources may submit an offer which shall be considered by the agency. The anticipated release date of the RFO is on or about August 14, 1998 with an anticipated offer due date to be announced in the RFO. Please be advised that this document only serves as notice of an anticipated procurement and is NOT the official RFO. An ombudsman has been appointed -- See Internet Note "B". The solicitation and any documents related to this procurement will be available over the Internet. These documents will be in Microsoft Office Suite (Word 6.0, Excel 5.0, PowerPoint 4.0) format and will reside on a World Wide Web (WWW) server, which may be accessed using a WWW browser application. The WWW address, or URL of the NASA/JSC Business Opportunities home page is http://procurement.nasa.gov/EPS/JSC/class.html. Posted 08/05/98 (D-SN232962). (0217)

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