NASA/Goddard Space Flight Center, Code 217, Greenbelt, MD 20771

A -- GLOBAL POSITIONING SYSTEM ATTITUDE AND NAVIGATION SENSOR SOL RFO5-08562-232 DUE 040897 POC Diane Scherer, Contract Specialist, Phone (301)286-5971, Fax (301)286-1720, Email Diane.B.Scherer.1@gsfc.nasa.gov WEB: Click here for the latest information about this notice, http://procurement.nasa.gov/EPS/GSFC/date.html#RFO5-08562-232. E-MAIL: Diane Scherer, Diane.B.Scherer.1@gsfc.nasa.gov. This is a modification to the synopsis entitled GLOBAL POSITIONING SYSTEM ATTITUDE AND NAVIGATION SENSOR, which was posted on March 24, 1997. You are notified that the following change is made to the nominal operating conditions of GANS performance: FROM: GANS performance shall be achieved under the following nominal operating conditions with selective availability (SA) enabled in any circular, low Earth orbit (LEO) whose radius is less than 1000 Km. TO: GANS performance shall be achieved under the following nominal operating conditions with selective availability (SA) enabled in any circular, low Earth orbit (LEO) whose attitude is less than 1000 Km. All other information remains the same. (0083)

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