Orbital Sciences Corporation, 21700 Atlantic Boulevard, Dulles, VA 20166

18 -- LAUNCH SERVICES Contact Mr. Cary Pao at 703-406-5227, FAX 703-406-5461. LAUNCH COMMERCIAL OPPORTUNITY FOR SMALL SPACE EXPERIMENTS OFFERED BY PRIVATE INDUSTRY. POC Orbital Sciences Corporation (OSC) Cary Pao Telephone: 703/406-5227. NASA has contracted with Orbital Sciences Corporation (OSC) under Contract No. NAS5-32839 to LAUNCH 2 firm and 8 optional small SPACECRAFT as primary payloads using the Pegasus air LAUNCH vehicle under the Ultralight Expendable Launch Vehicle (UELV) contract. Excess LAUNCH capacity exists on two of these flights; moreover NASA has specifically authorized multiple manifesting of small class SPACECRAFT as independent secondary PAYLOAD(S) and has vested OSC with the responsibility for management of unused LAUNCH vehicle capability. This excess capacity can be obtained either as a NASA sponsored secondary MISSION or directly procured from OSC as a Commercial mission. OSC invites organizations with potential secondary PAYLOADS to indicate their interest in co-manifested LAUNCH services on current or future launches. The following flight opportunities (Ultralight and Commercial) exist for secondary PAYLOAD manifesting: Mission A: Launch Date: 1st Half 1996, Orbit: 600 km @ 28.5-40i, Mass: 150 kg, Volume: 7'' length x 40'' diameter. Mission B: Launch Date: 1st Half 1996, Orbit: 750 km @ 25i, Mass: 200 kg, Volume: 45'' length x 46'' diameter. Mission C: Launch Date: 1st Half 1997, Orbit: 550 km @ 97.3i, Mass: 160 kg, Volume: 33'' length x 46'' diameter. Mission D: Launch Date: 1st Half 1997, Orbit: 550 km @ 97.3i, Mass: 140 kg, Volume: 33'' length x 46'' diameter. The shared MISSION process is intended to maximize available LAUNCH opportunities for small (Ultralight & New Millennium Class) PAYLOADS to obtain earth and space science/data, flight experimentation, and technology validation. These secondary PAYLOADS can either be attached or deployed with payload unique or OSC standard interfaces. In your reply, please indicate the mass, dimensions, target orbit, desired launch date, free flyer or attached, and status of your PAYLOAD. Inquiries will be screened and evaluated for compatibility with the primary mission. For those candidates that appear to be viable for co-manifesting, further technical and cost information will be exchanged leading to LAUNCH commitments. The following commercial payload opportunity also exist on the OSC Taurus launch vehicle for 1st half 1997, 775km@45 inclination, 640kg, 65'' length x 55'' diameter. Please contact Mr. Cary Pao, OSC Launch Systems Group, Voice: 703/406-5227, FAX: 703/406-5461, or Email: cpao@orbital.com, at 21700 Atlantic Blvd., Dulles, VA 20166. It is intended that definitive launch agreements be reached no later than 12 months or more prior to the scheduled launch. Notice: This is not a Government Solicitation. Any contract negotiated for launch of a secondary payload will be between OSC and the organization providing that payload. Reply by May 31, 1995. (075)

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