18 -- X-38 RADAR ALTIMERTER SYSTEM

Notice Date

April 13, 2001

Contracting Office

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

ZIP Code

00000

Solicitation Number

9-BH13-49-0-46p

Response Due

April 24, 2001

Point of Contact

Michele H. Ladrach, Contract Specialist, Phone (281) 483-6096, Fax (281) 244-5337, Email michele.h.ladrach1@jsc.nasa.gov -- Krystine O. Bui, Contracting Officer, Phone (281) 483-4186, Fax (281) 244-5337, Email krystine.o.bui1@jsc.nasa.gov

E-Mail Address

Michele H. Ladrach (michele.h.ladrach1@jsc.nasa.gov)

Description

THIS NOTICE CONSTITUTES AMENDMENT NO. 2 TO THE COMBINED Synopsis/RFO FOR X-38 RADAR ALTIMERTER SYSTEM SUPPLEMENTED WITH ADDITIONAL INFORMATION CONTAINED IN THIS NOTICE. Companies shall acknowledge all amendment(s) in their offer. This notice serves as the official amendment to the subject solicitation and a written amendment will not be issued. The purpose of this amendment is to correct Item 5 of the Added Best Value Characteristics and provide answers to the questions below. A revised Statement of Work (SOW) has been bolded/bar-marked to reflect changes is attached. Item 5 of the Added Best Value Characteristics is changed as follows: "Maintenance: Radar altimeter system requires no maintenance nor parts replacement during the required three year on-orbit shelf life (SOW Section 3.5.1.1) Questions and Answers: 1. What is the correct version of MIL-STD-461? Answer: Revision E is the correct version. 2. What is the orientation of the altimeter (reference Figure 8 of the SOW)? Answer: The 40G direction points to the nose of the vehicle. The vertical mounting plate to which the altimeter mounts also faces the nose. 3. What is the altimeter mounted on? Answer: A flat plate capable of 40G'S 4. Reference Statement of Work (SOW) paragraph 3.4.2.3.6, should this be "Random Vibration"? Answer: Yes 5. Is there information regarding the antenna installation available (e.g., location, spacing, etc.)? Answer: Information is now included in SOW paragraph 3.4.1.1.1. Landing Skid information is not yet available and will be addressed in a forthcoming amendment. 6. Reference SOW paragraph 3.4.1.4, please explain the statement that "all the radar altimeter system requirements of section 3.1 must be met with an uncovered antenna (no thermal tile)". Answer: Paragraph 3.4.1.4 in the SOW has been reworded as follows: "In order to preserve the antenna surfaces, all antenna environmental testing shall be performed with an uncovered antenna (no thermal tile). Consequently, a set of 'baseline' antenna parameters shall be measured with an uncovered antenna prior to environmental testing. The contractor shall verify the antenna adheres to the new 'baseline' performance characteristics during exposure to the environmental conditions specified in the following paragraphs, 3.4.1.4 through 3.4.1.4.4. Prior to test initiation, delta limits of performance characteristics during and after environmental testing shall be mutually agreed upon by both the contractor and the Government. Verification tests are listed in section 3.4.1.7, 'Testing Requirements'. The intent of the verification tests with an uncovered antenna is to demonstrate the antenna performance does not change during environmental testing." In addition, SOW paragraph 3.4.1.1.1 has been changed to clarify antenna requirements. It is as follows: "The antennas shall be operable through the Thermal Protection System (TPS), LI-2200 with reaction cured glass coating or AETB-8; i.e., all the radar altimeter system requirements of section 3.1 shall be met with the TPS in place over the antennas. The antennas shall be exposed in the space environment, mounted on the vehicle aluminum or composite panel under the TPS. Table 3 and Figure 2 show the assigned relative antenna positions on the X-38." The due date for receipt of offers is not extended. The due date for questions is extended until April 19, 2001. Offers shall provide the information stated in the synopsis/RFO posted on the NASA Acquisition Internet Service (NAIS) on March 9, 2001. Documents related to this solicitation will be available over the Internet. These documents are in Microsoft Office 97 format and reside on a World Wide Web (WWW) server, which may be accessed using a WWW browser application. The Internet site, or URL, for the NASA/JSC Business Opportunities home page is http://nais.msfc.nasa.gov/cgi-bin/EPS/bizops.cgi?gr=CL&pin=73

Web Link

Click here for the latest information about this notice (http://nais.msfc.nasa.gov/cgi-bin/EPS/bizops.cgi?gr=D&pin=73#9-BH13-49-0-46p)

Record

Loren Data Corp. 20010417/18SOL001.HTM (D-103 SN50J144)