EUVE
Extreme Ultraviolet Explorer

The objectives of the EUVE mission are to: (1) produce a high-sensitivity "all-sky" survey in the 70- to 760-angstrom portion of the spectrum; (2) perform a "deep survey" of a strip of the sky along the ecliptic with extremely high sensitivity; (3) perform follow-up spectroscopic observations on bright extreme ultraviolet point sources; (4) study stellar evolution and the local stellar population; (5) investigate energy transport in stellar atmospheres; and (6) study ionization and opacity of the interstellar medium. The initial "all-sky" survey was completed in January 1993, and a Guest Observer program was initiated in February, 1993. EUVE is controlled from the Center for EUV Astrophysics at the University of California, Berkeley.

Spacecraft
Based on the NASA/Fairchild Multi-Mission Spacecraft (MMS) bus. 3-axis stabilized. Downlink through TDRSS at 512 kbit/sec. Designed for on-orbit servicing by the Shuttle.

Payload
Three grazing incidence UV telescopes covering 80-900 angstroms (188 kg each). One EUV spectrometer (323 kg). The scanning telescopes will compile all-sky maps over 80-900 angstroms with positional accuracy of 0.1 deg. The spectrometer will observe in the anti-Sun direction along the ecliptic, to complete a survey in two bands between 80-500 angstroms.

Country of Origin	United States
Customer/User	GSFC, University of California Space Sciences Lab
Manufacturer(s)	NASA Goddard Space Flight Center, Fairchild
Size	4.5 x 3 meters
Orbit	528 km, incl. = 28.5 deg
Design Life	19 months
Related Sites	Center for EUV Astrophysics

Launch Facts

Name	Int'l Desig.	Date	Site	Vehicle	Orbit	Mass(kg)
Notes
EUVE	1992-031A	6/7/92	ESMC	Delta 6920-10	LEO	3275
Extreme Ultra-Violet Explorer; mapped galactic EUV sources