TABLE 2-1 



NASA Telescopes 



ORBITAL 



IUE 



HST 



ASTRO 



International Ultraviolet Explorer (1977) [Goddard Space Flight 

 Center] . This spacecraft has outlived its original planned lifetime, 

 but it continues to function and is supported by an active guest 

 investigator program. Longevity is unpredictable, no plans exist 

 to decommission the spacecraft. 



Hubble Space Telescope (1989) [Space Telescope Science Insti- 

 tute] . The first generation of instruments is constructed and 

 integrated into the telescope, awaiting launch. These instruments 

 are detailed in Appendix B. The next generation of instruments 

 (to be installed on orbit ~1994) have been selected for competi- 

 tive development during 1986-88. All three selected instruments 

 are described in Appendix B. 



Hopkins Ultraviolet Telescope (HUT) [Johns Hopkins Univer- 

 sity], Ultraviolet Imaging Telescope (UIT) [Goddard Space Flight 

 Center], Wisconsin Ultraviolet Photopolarimetry Experiment 

 (WUPPE) [University of Wisconsin] . These instruments have been 

 finalized by their respective proposers and will be flown at least 

 twice as a package Shuttle payload. Collaboration with the prin- 

 cipal investigators as a guest investigator is possible and will be 

 solicited by an announcement of opportunity (AO) for flights in 

 1989. 



COBE 



EUVE 



GRO 



AXAF 



Cosmic Background Explorer (1989) [Goddard Space Flight 

 Center]. The instrument complement is finalized and is detailed 

 in Appendix B. 



Extreme Ultraviolet Explorer (1991) [University of California 

 Berkeley Space Sciences Laboratory]. The instrument comple- 

 ment is finalized and is detailed in Appendix B. 



Gamma Ray Observatory (1990) [Marshall Space Flight Center] . 

 The instrument complement is finalized and is detailed in Appen- 

 dix B. 



Advanced X-ray Astrophysics Facility (1994) [Goddard Space 

 Flight Center] . The instrument complement has been selected on 

 the basis of a competitive AO, but implementation is not yet 



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