Extreme Ultra Violet Explorer - Also called Explorer 67
Launch data:
| Designation |
21987
/ 92031A
|
|
Launch
date
| 07
Jun 1992 |
| Launch site | CC, LC-17A |
| Launch vehicle |
Delta-6920-10 (#210) |
| Mission | Scientific: Astronomy |
| Earth orbit: |
|
Perigee/Apogee
|
503/527
km
|
|
Inclination
|
28.4°
|
|
Period
|
94.9
min
|
|
|
EUVE has completed a survey of the entire celestial sphere in the extreme
ultraviolet (UV) spectrum. Spectroscopic observations of individual targets are
now made possible for guest observers.
In Sep 2000 NASA decided to stop supporting the satellite at the end of the
year to meet budget cuts.
The Extreme Ultraviolet Explorer, was switched off on
Feb 2, 2001. NASA decided to terminate funding for the mission, even though
the spacecraft was still operating well. EUVE was launched on 1992 June
7 into a 514 km x 528 km x 28.4 deg orbit. It carried three sky survey
scanner EUV telescopes and a deep survey telescope with a 1.4m focal
length and a 2-degree field of view. The sky survey was completed in Jan
1993 and since then EUVE has been used by guest astronomers for
observations of specific targets. Most EUV observations are of nearby
stars and the interstellar medium, since hydrogen absorption makes the
galaxy almost opaque at EUV (0.01-0.09 micron) wavelengths, but a few
extragalactic objects do shine through. The EUVE project was led by
Berkeley, and in 1997 the Center for EUV Astrophysics at Berkeley took
over operational control of the satellite. It is now in a 424 x 433 km x
28.4 deg orbit and will probably reenter next year. The final
observations were made on Jan 26. After end-of-life tests of the
never-used backup high voltage supplies and checking the remaining
battery capacity, EUVE was stabilized pointing away from the Sun and
sent into safehold at 2359 UTC on Jan 31. The transmitters were
commanded off on Feb 2, 2001.
History of NASA's Delta-class Explorers
---------------------------------------
Launch End of ops Current orbit
Int'l Sun-Earth Explorer 1 ISEE-1 1977 Oct 22 1987 Sep 26 Reentered 1987
Int'l Ultraviolet Explorer IUE 1978 Jan 26 1996 Sep 30 29474 x 42211 x 38
Int'l Sun-Earth Explorer 3 ISEE-3 1978 Aug 12 1997 May 5 Solar orbit
Dynamics Explorer 1 DE-1 1981 Aug 3 1991 Feb 28 581 x 23192 x 88
Dynamics Explorer 2 DE-2 1981 Aug 3 1983 Feb 19 Reentered 1983
Solar Mesosphere Explorer SME 1981 Oct 6 1986 Dec Reentered 1991
Charge Composition Explorer AMPTE-CCE 1984 Aug 16 1989 Jan 1102 x 49679 x 3
Cosmic Background Explorer COBE 1989 Nov 18 1997 May 1 873 x 887 x 99
Extreme Ultraviolet Explorer EUVE 1992 Jun 7 2001 Feb 2 424 x 433 x 28
X-ray Timing Explorer RXTE 1995 Dec 30 Operational 540 x 555 x 23
Advanced Composition Explorer ACE 1997 Aug 25 Operational Earth-Sun L1
Far UV Spectroscopic Explorer FUSE 1999 Jun 24 Operational 751 x 766 x 25
Decay:
| Out of service: | |
| Cause: | |
| Descent date: | 31 Jan 2002 |
| Lifetime: | |
Based on the MultiMission Spacecraft bus.
Telemetry & command via
TDRS.
Telemetry: 2287.5 MHz (realtime: 1/32 kbps, playback: upto 1024 kbps)
Command: 2106.4 MHz (1/0.125 kbps)
|
Ref.: #7(SR446), 15, #27 - update: 15.07.04 |
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