NASA/Goddard Space Flight Center, NASA Headquarters Acquisition Branch, Code 210.H, Greenbelt, MD 20771

A -- MARS SURVEYOR PROGRAM 2003 LANDER MISSION AND MARS 2005 DEFINITION STUDIES; PREPARING FOR HUMAN EXPLORATION OF MARS SOL AO-99-HEDS-01 DUE 081799 POC Peter Ahlf, Life Sciences Division, Phone (202) 358-0708, Fax (202) 358-4168, Email peter.ahlf@hq.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/HQ/date.html#AO-99-HEDS-01. E-MAIL: Peter Ahlf, peter.ahlf@hq.nasa.gov. The purpose of this amendment is to clarify that this Announcement of Opportunity will be open through August 17, 1999, as opposed to August 10, 1999 as originally stated. Accordingly, the anticipated due date for proposals is also August 17, 1999. Posted 06/02/99 (D-SN337942). (0153)

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