NASA Headquarters, Administration & Resources Management Division, Washington, DC 20546 Attn:SZ/John Lintott

99 -- MEDIUM-CLASS EXPLORER SOL AO 95-OSS-02 POC John Lintott tel: (202) 358-0382 The National Aeronautics and Space Administration is planning to announce the opportunity to conduct space science investigations in the Explorer Program using scientific payloads launched with Med-Lite expendable launch vehicles. The opportunity is limited to astrophysics and space physics scientific disciplines. The Medium-class Explorer (MIDEX) Announcement of Opportunity will solicit 2 investigations which NASA expects to confirm for flight and to launch before the end of 2000. Proposals are due June 27, 1995. Beginning March 27, 1995, the Announcement will be available electronically from the NASA FTP server. You can connect from an Internet host with the command ''ftp.mercury.hq.nasa.gov.'' You should use ''anonymous'' for the user name and enter your email address for the password. Files containing the AO and the Appendices in various formats are located in a directory entitled ''/pub/astrophysics/AOs/Midex''. Download the file entitled ''README'' which contains a listing of the MIDEX AO files and information about retrieving the files electronically. If you are unable to retrieve the Appendices electronically from the FTP server, you can request a paper hardcopy version of Announcement AO-95-OSS-02 from: Explorers Project Library, Code 410, Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, MD 20771, FAX: (301) 286-1698, E-Mail: MIDEX_DOC@ccmail.gsfc.nasa.gov The solicitation will be open to all categories of organizations; educational institutions, industry, nonprofit institutions, NASA Field Centers, and other governmental agencies, as well as foreign research institutions. (0068)

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