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Дата: 08 мая 1998 (1998-05-08)
От: Alexander Bondugin
Тема: Lunar Prospector Update - May 1, 1998
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Lunar Prospector Mission Status Report #30
May 1, 1998 - 1:00 p.m. EST (10:00 a.m. PST)
The Lunar Prospector spacecraft continues to perform very well and
instruments are collecting good data.
Several maneuvers were performed in the last week: a test pulse firing in
preparation for the larger precession maneuver (planned for 3 days later),
a reorientation of the spin axis to improve the Sun angle, a
circularization set of burns to adjust the orbit, and a spin trim to
maintain nominal rate.
On April 23 (DOY 113), commands were sent to set the telemetry to read out
thruster temperatures at a high rate for the test on April 24 (DOY 114).
Lunar Prospector executed a 2-pulse reorientation maneuver at 8:31AM (PDT)
April 24 (GMT 114/1531). Engines used were A1 and A4, each executed one
0.2 second pulse, for a total reorientation of approximately 0.15 degrees.
On April 27 (DOY 117), the spin axis was precessed by 8.5 deg by firing 40
0.2-sec pulses. Engines A1 and A4 were fired at 8:08AM (PDT) (117/1508).
A set of circularization burns were fired on May 1 (DOY 121). At 8:50AM
(15:50 GMT), thrusters A3 and A4 were fired for 38.8 seconds to increase
the s/c velocity by 6.0 m/s, raising periapsis (lowest point in orbit) from
85 km to 112 km. At 9:54 (16:54), thrusters A3 and A4 were fired for 37.1
seconds at the ascending node to make a new periapsis with altitude 88 km
by slowing the spacecraft down by 5.74 m/s. The target orbit is now 88 x
112 km but with apoapsis (highest point in orbit) and periapsis flipped.
The spin rate was trimmed with a spin down maneuver at 10:35 (17:35 GMT).
Thruster T1 was fired for 0.7 seconds to reduce the spin rate from 12.15 to
11.95 rpm.
After the maneuver burns, the high-level voltage on the GRS instrument was
increased by one count with a GHV1LEV command.
Current spacecraft state 9:00 (1600 GMT 5/1/98) [before all burns today]:
Orbit: 1330
Downlink: 3600 bps
Spin Rate: 11.96 rpm
Spin Axis Attitude (ecliptic):
Latitude: 88.9 deg
Longitude: 79.1 deg
Trajectory:
Periselene Alt: 85 km
Aposelene Alt: 114 km
Period: 118 minutes
Occultations: none
Eclipses: 45 minutes
The navigation team will need several hours to confirm the orbit burns, but
preliminary data shows that everything went nominally.
Lisa Chu Thielbar
NASA Ames Research Center
Moffett Field, CA 94035-1000
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Дата: 08 мая 1998 (1998-05-08)
От: Alexander Bondugin
Тема: Space Science Upate To Show How To Feed A Black Hole
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Douglas Isbell
Headquarters, Washington, DC May 7, 1998
(Phone: 202/358-1547)
Ray Villard
Space Telescope Science Institute, Baltimore, MD
(Phone: 410/338-4514)
NOTE TO EDITORS: N98-32
SPACE SCIENCE UPDATE TO SHOW HOW TO FEED A BLACK HOLE
New visible and infrared images of Centaurus A, the nearest
active galaxy to Earth, are the focus of the next Space Science
Update. These images, obtained by NASA's Hubble Space Telescope,
are providing astronomers with unique insights about the
supermassive black hole at the galaxy's center, which is actively
"feeding" due to a recent galactic collision.
The press briefing will be held at 1 p.m. EDT on Thursday,
May 14, at NASA Headquarters. Participants will include:
Dr. Ethan J. Schreier
Astronomer and associate director for operations,
Space Telescope Science Institute, Baltimore, MD
Dr. Alessandro Marconi
Astronomer, Astrophysical Observatory of Arcetri, Florence, Italy
Dr. Anne Kinney
Astronomer, Space Telescope Science Institute, Baltimore, MD
Dr. Bruce Margon
Astronomy professor and former chairman of the Astronomy Department,
University of Washington, Seattle, WA
Dr. Dave Leckrone
Senior project scientist, Hubble Space Telescope Project, NASA
Goddard Space Flight Center, Greenbelt, MD
The Space Science Update will originate from the NASA
Headquarters Auditorium, 300 E St., S.W., Washington, DC. It will
also be carried live on NASA TV with two-way question-and-answer
capability for reporters covering the event from participating
NASA centers, including the Johnson Space Center in Houston, site
of the media workshop on the International Space Station.
NASA Television is broadcast on the GE-2 satellite, located
on Transponder 9C, at 85 degrees West longitude, vertical
polarization, frequency 3880.0 Mhz, audio 6.8 MHz. Live audio of
the broadcast will be available on voice circuit at NASA's Kennedy
Space Center, FL, on 407/867-1220.
-end-
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Дата: 08 мая 1998 (1998-05-08)
От: Alexander Bondugin
Тема: WDC-A R&S Launch Announcement 12936: Cosmos 2351
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COSPAR/ISES
WORLD WARNING AGENCY FOR SATELLITES
WORLD DATA CENTER-A FOR R & S, NASA/GSFC
CODE 633, GREENBELT, MARYLAND, 20771. USA
SPACEWARN 12936
COSPAR/WWAS USSPACECOM NUMBER
SPACECRAFT INTERNATIONAL ID (CATALOG NUMBER) LAUNCH DATE,UT
COSMOS 2351 1998-027A 25327 07 MAY 1998
DR. JOSEPH H. KING, DIRECTOR, WDC-A-R&S.
[PH: (301) 286 7355.
E-MAIL: KING@NSSDCA.GSFC.NASA.GOV
07 MAY 1998, 19:00 UT]
Further details will be in the next SPACEWARN Bulletin
Dr. Edwin V. Bell, II
_/ _/ _/_/_/ _/_/_/ _/_/_/ _/_/ Mail Code 633
_/_/ _/ _/ _/ _/ _/ _/ _/ NASA Goddard Space
_/ _/ _/ _/_/ _/_/ _/ _/ _/ Flight Center
_/ _/_/ _/ _/ _/ _/ _/ _/ Greenbelt, MD 20771
_/ _/ _/_/_/ _/_/_/ _/_/_/ _/_/ +1-301-286-1187
ed.bell@gsfc.nasa.gov
SPACEWARN home page: http://nssdc.gsfc.nasa.gov/spacewarn/
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Дата: 08 мая 1998 (1998-05-08)
От: Alexander Bondugin
Тема: Sam Armstrong Named Associate Administrator For Aeronautics And Space
Subject: Sam Armstrong Named Associate Administrator For Aeronautics And Space
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Dwayne C. Brown
Headquarters, Washington, DC May 7, 1998
(Phone: 202/358-1726)
RELEASE: 98-78
ARMSTRONG NAMED ASSOCIATE ADMINISTRATOR FOR
AERONAUTICS AND SPACE TRANSPORTATION TECHNOLOGY
Lt. Gen. Spence M. (Sam) Armstrong (USAF, Ret.) has been
named to head NASA's Aeronautics and Space Transportation
Technology Enterprise at NASA Headquarters in Washington, DC,
effective May 11, 1998, Administrator Daniel S. Goldin announced today.
Armstrong's extensive career includes experience in flight
testing and astronautical engineering as well as command at five
different levels within the U.S. Air Force. He has served as
NASA's Associate Administrator for Human Resources and Education
since September 1991. (Stanley S. Kask Jr. will serve as acting
Associate Administrator for this office.) Prior to that
assignment, Armstrong served as director of program architecture
for the Synthesis Group, formed as a temporary organization from
1990-1991 to develop long-range program architectures for the U.S.
human space flight program.
As Associate Administrator, Armstrong will be responsible for
strategic planning, requirements definition and budgetary
formulation of NASA's aeronautics research and space
transportation technology activities. Armstrong's duties will
include overall responsibility for each of NASA's four
aeronautical research centers -- Ames, Moffett Field, CA; Dryden,
Edwards Air Force Base, CA; Langley, Hampton, VA; and Lewis,
Cleveland, OH.
"We are at a crucial time for NASA, the Nation and the world
in aerospace technology," Goldin said. "We have the traditional
aeronautics research and we have the technologies that are
emerging from the efforts in space transportation. NASA needs to
fully integrate the two to get the leverage and synergy needed if
we are to be the future aerospace leader. I've chosen Sam
Armstrong because he has the technical background and proven
track record as a leader. He has my complete backing to make this
happen through organizational changes within the enterprise and
through cooperation with other government agencies, the aerospace
industry and the international community."
Armstrong is a retired U.S. Air Force Lieutenant General and
command pilot with over 4,500 hours (including 100 missions over
North Vietnam in the F-105) flying time in 50 different aircraft.
He was Vice Commander of Air Force Systems Command from July 1987
to April 1990, and prior to that was Vice Commander in Chief,
Military Airlift Command.
From July 1983 to July 1985 he was Chief of the U.S. Military
Training Mission to Saudi Arabia. He also served as Commander,
Air Force Military Training Center, San Antonio, TX; Deputy Chief
of Staff for Technical Training, Air Training Command; Deputy
Director for Space and C3, DCS Research, Development, and
Acquisition, Headquarters USAF, the Pentagon; Assistant Deputy
Chief of Staff for Operations, Air Training Command; Commander,
80th Flying Training Wing, Sheppard Air Force Base, TX; Base
Commander and, later, Deputy for logistics, 12th Flying Training
Wing, Randolph AFB, TX.
He graduated from the U.S. Naval Academy, Annapolis, MD, with
a BS in engineering. Armstrong also received master's degrees in
both astronautical and instrumentation engineering from the
University of Michigan. He also attended Harvard University's
Senior Managers in Government Program; Columbia University's
Executive Program in Business Administration; the USAF Aerospace
Research Pilot School, Edwards Air Force Base, CA; and the Air War
College.
He is married to the former Beth Webb of Myrtle Beach, SC,
and they have two children and three grandchildren.
-end-
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Дата: 08 мая 1998 (1998-05-08)
От: Alexander Bondugin
Тема: Full Data Sets From Galileo's First 7 Orbits Now Available
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Galileo Solid State Imaging Full Data Releases
ALL IMAGES
obtained by the Galileo Solid State Imaging (SSI) system during the
spacecraft's first seven orbits (G1, G2, C3, E4, E6, G7) of Jupiter are now
validated and available.
Images and data obtained by NASA/JPL's Galileo mission have been available
on an ongoing basis during the spacecraft's journey through the Jovian
system in order to share with the public the excitement of exploration and
new discoveries being made via the NASA/JPL Galileo spacecraft. Galileo
scientists have a one year period set aside for the process of calibrating
and validating the data. The full digital images necessary for scientific
analysis are released within one year of receipt of an orbit's last data.
* IMAGE PRODUCTS from the ongoing public releases are available now in
multiple formats (including tiff, gif, pict, jpeg).
* ALL IMAGES from the first seven orbits (G1, G2, C3, E4, E6 & G7) are
merged and validated and available via the Planetary Data System.
* Nominal Mission (6/96 - 12/97) Release Schedule for validated data sets
* ALL Galileo Cruise Phase (10/89 - 12/95) Data
ALL IMAGING DATA from Orbits 1 through 7
is available via the Planetary Data System (PDS) Imaging Node
For Galileo SSI data, go to URL:
http://www-pdsimage.jpl.nasa.gov/PDS/public/Atlas/Atlas.html
and select the option:
"Galileo SSI REDRs of Earth and the Moon, Venus, Gaspra, Ida, and Jupiter
and its satellites "
The PDS homepage is: http://www-pdsimage.jpl.nasa.gov/PDS/
The PDS offers a simple query interface to access all fully released SSI
data. It allows the user to search by various parameters such as target
name, spacecraft clock, latitude/longitude, filter, phase angle, exposure,
gain, and compression ratio. PDS will continue to expand and improve this
interface which will eventually include a format to select data via a map
interface.
To accomodate the various needs of the scientific community, the archived
files are raw data files which merge the multiple downlinks of data to
provide the best final version of an image. Supporting data such as
calibration files are also available. Such files include dark currents,
radiometric calibrations, blemishes, hot pixels, etc..
Galileo Primary Mission (6/96-12/97)
Solid State Imaging Orbital Data Sets
Public Release Schedule
Orbit 1 (G1) September 06, 1997
Orbit 2 (G2) November 04, 1997
Orbit 3 (C3) December 19, 1997
Orbit 4 (E4) February 20, 1998
Orbit 6 (E6) April 05, 1998
Orbit 7 (G7) May 07, 1998
Orbit 8 (G8) June 25, 1998
Orbit 9 (C9) September 17, 1998
Orbit 10 (C10) November 06, 1998
Orbit 11 (E11) & GEM Schedules will be posted when available.
NASA/JPL's Galileo Project gratefully acknowledges the collaborative efforts
of NASA's Planetary PhotoJournal and the Planetary Data System in making
Galileo mission images and data available to the public and scientific
communities.
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