MODIFICATION
59 -- NAVIGATOR GPS FRONT-END ELECTRONICS
- Notice Date
- 5/21/2010
- Notice Type
- Modification/Amendment
- NAICS
- 334419
— Other Electronic Component Manufacturing
- Contracting Office
- NASA/Goddard Space Flight Center, Code 210.M, Greenbelt, MD 20771
- ZIP Code
- 20771
- Solicitation Number
- NNG10335445Q
- Response Due
- 5/25/2010
- Archive Date
- 5/21/2011
- Point of Contact
- Nadja Hardy, Contract Specialist, Phone 301-286-4356, Fax 301-286-0794, Email nadja.hardy@nasa.gov - Karen M. Place, Contracting Officer, Phone 301-286-0422, Fax 301-286-1720, Email Karen.M.Place@nasa.gov
- E-Mail Address
-
Nadja Hardy
(nadja.hardy@nasa.gov)
- Small Business Set-Aside
- Total Small Business
- Description
- This notice constitutes Amendment No. 02 to the Combined Synopsis/RFQ entitledNAVIGATOR GPS FRONT-END ELECTRONICS posted on May 06, 2010. Companies shall acknowledgeall amendment (s) in their quote. This notice serves as the official amendment to subjectsynopsis/RFQ and a written amendment will not be issued. The purpose of this amendment is to clarify and answer a technical question receivedregarding this acquisition. The response for the RFQ has not changed. Question and Answer are provided below: Question - Par. 3.6.3:Shock test is always specified by SHOCK LEVEL, SHOCK DURATION andPULSE SHAPE. I dont see this requirement at this time. Is this something that shouldbe deferred at this time?Answer: The component shock response spectrum (SRS) is intended to characterize theexpected shock environment at the interface to the Front-End Electronics (FEE). Thisinformation is provided to allow assessment of the hardware against this shockenvironment. If the vendor can demonstrate that the hardware is not susceptible todamage from this shock environment, preferably by comparison with previous test exposure,then component shock testing is not required.If there is insufficient information to demonstrate that the FEE can survive the expectedshock environment, then the hardware may need to be shock tested to demonstratequalification.If shock testing is required, then the appropriate shock test level willneed to be defined. Typically, shock testing is performed using either a mechanicalimpact device or on a shaker table. If a mechanical impact device is used, then it willbe necessary to tune the impact parameters to match the required SRS shown in Figure 3-2of the performance specification. If shock simulation is being performed through the useof a shaker table, then a suitable transient waveform must be defined that matches therequired SRS. Typically, a tuned single-pulse (i.e half-sine) is not sufficient togenerate the frequency content of a pyro-shock event and a more complex transientwaveform is required if shaker testing is being used to demonstrate shock qualification. However, the definition of an equivalent half-sine pulse can be useful to evaluate themagnitude of the shock environment in the time domain.For reference, an equivalent half-sine pulse has been derived that has a peak SRSmagnitude and frequency content that provides an approximate match to the shock SRSenvironment specified in Figure 3-2 of the FEE performance specification. The details ofthis half-sine pulse are as follows:Shock Amplitude: 400gPulse Type: half-sinePulse Duration: 0.04 msec (4 x 10-4 secs)The half-sine pulse defined above is shown in Figure 1. Also shown in this figure is acomplex transient waveform that has been derived using a series of decaying sine waves. Figure 2 shows a comparison of the SRS for each of the simulated shock transients ascompared with the expected shock environment. It can be seen from Figure 2 that thecomplex transient shows a better match with the expected shock environment over a widerfrequency range.The specification of the transient waveform for shock testing the FEE is not required atthis time. The near-term requirement is for the vendor to provide an assessment of thehardware against the shock environment as defined in the performance specification and todetermine if shock testing should be performed. If based on this assessment, shocktesting is required then the appropriate test configuration and input parameters can bedefined at that time.The due date for RFQ responses is midnight EDT, TUESDAY, MAY 25, 2010. Offerors are responsible for monitoring this site for the release of the solicitation andany amendments. Potential offerors are responsible for downloading their own copy of thesolicitation and amendments (if any). Companies shall provide the information stated in the synopsis/RFQ posted on the NASAAcquisition Internet Service (NAIS) by midnight EDT on May 25, 2010. Documents related tothis procurement are available over the internet. These documents reside on a World WideWeb (WWW) server which may be accesses using a WWW browser application. The Internet siteor URL, for the NASA/GSFC Business Opportunities home page is:http://prod.nais.nasa.gov/cgi-bin/eps/bizops.cgi?gr=D&pin=51
- Web Link
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- Record
- SN02157094-W 20100523/100521235555-ef7fe9d6b3bcb687cf9ee17bdd995fbc (fbodaily.com)
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