SYMPOSIUM ON OPTICAL SYSTEMS CONCEPTS AND TECHNOLOGY FOR THE NEXT GENERATION SPACE TELESCOPE (NGST) Contact James W. Bilbro/EB51, Phone: 205-544-3467, Fax: 205-544-2659, email: james.bilbro@msfc.nasa.gov. You are cordially invited to attend a Symposium on Optical Systems Concepts and Technology for the Next Generation Space Telescope (NGST) at the Marshall Space Flight Center (MSFC) in Huntsville, Alabama, April 15 - 17, 1996. The symposium is being organized by MSFC's Center of Excellence for Space Optical Systems in support of the Goddard Space Flight Center's mission studies on the NGST. The purpose of the symposium is six fold: 1) To introduce the community to the proposed goals for the Optical Telescope Assembly (OTA) of the NGST. 2) To solicit from the community concepts for the OTA. 3) To offer the community (particularly small businesses) an opportunity to show case technologies which would be applicable to the OTA. 4) To identify new technologies which need to be developed. 5) To promote an interchange of information amongst members of the community. 6) To raise awareness of the potential for submissions to a SBIR focused topic on Large Aperture Space Telescope Systems to be released this summer. Consequently, presentations are being solicited which will address the above areas. The length of the presentations will be 30 minutes. Presentation material should be made available in a format suitable for reproduction and distribution to the attendees. If more presentations are submitted then time permits, then parallel sessions or poster sessions will be employed. If you are making a presentation, please let me know by April 1. The symposium will be held at the Morris Auditorium in Bldg 4200 at MSFC. The symposium will start at 9:00 am on April 15th and will adjourn at 4:30 pm April 17th. A tour of the optics facilities at MSFC will be provided for interested persons during the symposium. A detailed agenda will be provided at a later date. A block of rooms has been set aside at the Huntsville Marriot Tranquility Base, phone #205-830-2222. Rooms are available at a government rate of $58 (picture id required) and a corporate rate of $79. Reservations must be made by March 29th. A map of the area and a list of other hotels can be made available upon request. The current goals of the Optical Telescope assembly are as follows: Aperture diameter: 8 m, F#: 1.5, FOV: 10 arcmin x 10 arcmin, Wavelength - 1 microns to 5 microns (goal 0.5 - 30 microns), Temperature - 60 K (goal 30 K) Passive Cooling, Orbit - L2, Weight - 1000 Kg, Packaged in upper 8 m of Atlas IIas shroud for launch, Cost - $100M. Additional information may be obtained by contacting: James W. Bilbro/EB51, Phone: 205-544-3467, Fax: 205-544-2659, email: james.bilbro@msfc.nasa.gov.

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