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

58 -- GLOBAL POSITIONING SYSTEM (GPS) ANTENNAS FOR X-38 SOL 9-BH13-62-0-GPS1 DUE 053000 POC Matrenia R Anumele, Purchasing Agent, Phone (281) 483-4144, Fax (281) 244-5331, Email matrenia.r.anumele1@jsc.nasa.gov -- Keith D. Hutto, Contracting Officer, Phone (281) 483-4165, Fax (281) 244-5337, Email keith.d.hutto1@jsc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.msfc.nasa.gov/cgi-bin/EPS/bizops.cgi?gr=D&pin=73#9-BH13-62-0-GPS1GPS1. E-MAIL: Matrenia R Anumele, matrenia.r.anumele1@jsc.nasa.gov. NASA/JSC is hereby soliciting information and for potential sources on Global Positioning System (GPS) Antennas for X-38. This document is for information and planning purposes and to allow industry the opportunity to verify reasonableness and feasibility of the requirement, as well as promote competition. Prospective offerors are invited to sumbit comments or questions to: Jim Keiser/Mail Code EV, no later than May 30, 2000. In responding reference 9-BH13-62-0-GPS1. Comments may be forwarded to JAMES.R.KEISER1@JSC.NASA.GOV via electronic transmission or by Phone 281-483-0207. The antenna will be hemispherical (omni) passive GPS antennas. Antennas will be surface mounted on a composite panel of the X-38 vehicle in an array under a thermal protection covering. Qualification and acceptance testing is required by the vendor. The GPS antennas will have with the following electronic and physical characteristics while meeting the stated environmental conditions: Electronic Characteristics Operating Frequency(L1): 1575 MHz +/- 2 MHz (min) Polarization: Right-hand circular Input Impedance: 50 Ohms with a tolerance specified by the VSWR variation. Antenna gain will be: > 0.0 dBic at antenna boresight > -3.0 dBic for angles less than 60 : from boresight > -5.0 dBic for angles less than 75: from boresight The free space antenna performance requirements include the following: VSWR Variation: < 1.5 to 1 over the operating frequency specified Axial Ratio: < 5 dB up to +/- 60 : from boresight Relative phase angle matching error: will vary less than 5: at boresight within the set antennas at 75 : F. Absolute phase tracking deviation: will vary less than 5: at boresight over a 75 : F to 200: F temperature range for each antenna. Physical Characteristics: Envelope: 0.3" height with 2.5" x 2.5"area or 2.5 " diameter area (not including the connector) Connector: SMA straight connector is desired. Environment Conditions: Operating Gravitational Field: down to 0 g Non-operating Design Load: 40 g's Non-operating Vibration limits: see Table 1 below Table 1: X-38 Wall Mounted Random Vibration Environment Normal Axis In-Plane Axes Frequency (Hz) Magnitude (g2/Hz) Frequency (Hz) Magnitude (g2/Hz) 20 0.015 20 0.015 100 0.500 90 0.300 1000 0.500 350 0.300 2000 0.030 2000 0.020 Grms = 24.690 Grms = 14.294 Notes : Duration is 4 minutes per axis Operating Pressure Range: 15.2 psia to 5.5 x 10-12 psia Operating Temperature Range: -80 0F to +200 0F, Operating Thermal/Vacuum Cycling Conditions: The antenna will be tested 5 cycles per Figure 1, with maximum and minimum levels +/- margin shown in the left margin. The rate of temperature will not exceed 4.00 F per minute, nor be less than 1.00 F per minute. Figure 1: Thermal Cycles and Thermal Vacuum Cycles for Qualification Testing Note: A = Time to stabilize antenna temperature plus 1-hour minimum B = VSWR measurement to be performed C = VSWR monitoring during temperature transition Data Deliverables: Vendor will be required to supply the following information: 1) Compliance Matrix 2) Outline Drawing(s) 3) Bill of Materials (BOM) List 4) Certificate of Compliance 5) MTBF numbers 6) Qualification and acceptance test plans/procedures/results 7) Mechanical stress analysis (optional) 8) Fracture control analysis (optional) No solicitation exists; therefore, do not request a copy of the solicitation. If a solicitation is released it will be synopsized in the CBD and on the NASA Acquisition Internet Service. It is the potential offerors responsibility to monitor these cites for the release of any solicitation or synopsis. Vendors having the capabilities necessary to meet or exceed the stated requirements are invited to submit appropriate documentation, literature, brochures, and references. Responses must include the following: name and address of firm, size of business; whether they are large, small, small disadvantaged, 8(a), HUBZone, and/or woman-owned; number of years in business. Technical questions should be directed to: Jim Keiser, See above. Procurement related questions should be directed to: See point of contacts. Please advise if the requirement is considered to be a commercial or commercial-type product. A commercial item is defined in Internet "Note A". This synopsis is for information and planning purposes and is not to be construed as a commitment by the Government nor will the Government pay for information solicited. Respondents will not be notified of the results of the evaluation. Respondents deemed fully qualified will be considered in any resultant solicitation for the requirement. The Government reserves the right to consider a small business or 8(a) set-aside based on responses hereto. All responses shall be submitted to Jim Keiser no later than May 30, 2000. In responding reference 9-BH13-62-0-GPS1. Any referenced notes can be viewed at the following URL: http://genesis.gsfc.nasa.gov/nasanote.html Posted 05/03/00 (D-SN450856). (0124)

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