Space & Astronomy/Space and Astronomy (October 1993).iso/mac/TEXT/DAILY_2/930607.DFC

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07-Jun-93 Daily File Collection
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=--=--=START=--=--= NASA Spacelink File Name:930607.REL

6/7/93: NEW STS-57 LAUNCH DATE

Ed Campion
Headquarters, Washington, D.C.                   June 7, 1993

Bruce Buckingham
Kennedy Space Center, Fla.

EDITORS NOTE

NASA SETS JUNE 20 AS NEW DATE FOR THE STS-57 SHUTTLE MISSION

     NASA managers today set June 20, 1993 as the new launch date for the next
flight of the Shuttle system.  The STS-57 mission will see Space Shuttle
Endeavour and her six person crew conduct a mission highlighted by the
retrieval of the European observation satellite EURECA and the first flight of
a commercial spacelab facility known as Spacehab.

     The decision to go with a June 20 date follows the completion of work to
remove and replace the liquid oxygen turbopump from Endeavour's #2 main engine.
The pump was changed out because of an issue which was raised with a part on
the pump.  The decision to remove and replace the pump delayed the launch of
Endeavour which was originally scheduled for June 3rd.

     The launch window on June 20 opens at 9:37 a.m.  EDT and extends for 1
hour and 11 minutes.  The limited launch window time is based on EURECA
retrieval requirements.  The mission duration is planned for 7 days.  However,
it may be extended by 1 day immediately after launch if projections calculated
at that time for electrical power consumption permit an extra day in space.
The extra day will give two members of Endeavour's crew the opportunity to
perform an extravehicular activity (EVA) or spacewalk.

     This will be the fourth flight of Space Shuttle Endeavour and the 56th
flight of the Space Shuttle system.

- end -
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
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=--=--=START=--=--= NASA Spacelink File Name:930607.SHU

KSC SHUTTLE STATUS 6-7-93


        KENNEDY SPACE CENTER SPACE SHUTTLE STATUS REPORT
                      Monday, June 7, 1993

KSC Contact: Bruce Buckingham       407-867-2468 (fax [phone])
-----------------------------------------------------------------

Mission: STS-57/Spacehab/EURECA-Retrieval  Orbital Alt. 287 miles
Vehicle: Endeavour/OV-105                 Inclination: 28 degrees
Location: Pad 39-B                        Crew Size: 6
Launch Date/Window: June 20 at 9:37 a.m. EDT
Expected KSC Landing Date: June 28
Expected Mission Duration: 7 days/23 hours (if cryogenics allow)

IN WORK TODAY:
*  Secure new high pressure oxidizer turbopump (HPOTP) to main
   engine 2
*  Reaction control system helium tank pressurization
*  Pressurization checks and trickle purge of Reaction Control
   System and Orbital Maneuvering System

WORK SCHEDULED:
*  Engine leak checks
*  Engine 2 heatshield installation
*  Helium Signature test

WORK COMPLETED:
*  Preliminary HPOTP leak checks
*  HPOTP torque checks on main engine 2

-----------------------------------------------------------------
Mission: STS-51/ACTS-TOS/ORFEUS-SPAS      Orbital Alt.: 184 miles
Vehicle: Discovery/OV-103                 Inclination: 28 degrees
Location: OPF bay 3                       Crew Size: 5
Mission Duration: 9 days/22 hours     Target Launch Date: July 17

IN WORK TODAY:
*  Orbiter aft compartment closeouts
*  Orbiter mid-body closeouts
*  Preparations to replace Ku-Band deploy assembly

WORK SCHEDULED:
*  Main landing gear functional tests
*  Close payload bay doors
*  Aerosurface checks and operations

WORK COMPLETED:
*  Crew equipment interface tests
*  Nose landing gear functional checks
*  Microwave landing system tests
*  External tank/solid rocket booster electrical checks in VAB
   high bay 1


-----------------------------------------------------------------
Mission: STS-58/SLS-2              Orbital Altitude: 176 miles
Vehicle: Columbia/OV-102           Inclination: 39 degrees
Location: OPF bay 2                Crew Size: 7
Mission Duration: 14 days
Target launch period: Early/Mid September

IN WORK TODAY:
*  Operations to remove fifth cryogenic tank set
*  Configure payload bay for SLS-2
*  Preparations to remove Ku-Band deploy assembly
*  Preparations to remove main engines

WORK SCHEDULED:
*  Remove main engines
*  Drag chute installation

WORK COMPLETED:
*  Auxiliary power unit catch bottle drain
*  Orbital maneuvering system hypergolic deservice preparations
*  Remove and replace thruster from left OMS pod


                          #   #   #   #
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
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=--=--=START=--=--= NASA Spacelink File Name:930607A.REL

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6/7/93: Space Station Redesign Fact Sheets

     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:930607B.REL

6/7/93: NEW DISCOVERIES BY NASA'S EUV EXPLORER PRESENTED

Paula Cleggett-Haleim
Headquarters, Washington, D.C.                  June 7, 1993

Randee Exler
Goddard Spaceflight Center, Greenbelt, Md.

RELEASE:  93-105

        Recent discoveries from NASA's Extreme Ultraviolet Explorer (EUVE) will
be presented June 7 and 8, 1992, at the 182nd National Meeting of the American
Astronomical Society (AAS), University of California at Berkeley following the
1-year anniversary of EUVE's launch.

        The new results include discovery of elements that blanket the light
from white dwarf stars, the detection of ionized helium in the local
interstellar gas, the detection of an extreme ultraviolet shadow in the local
interstellar medium and new findings on the mysteries of rare extragalactic
objects.

        The astronomers will discuss why hot white dwarf stars emit only small
amounts of extreme ultraviolet radiation, despite that their high temperatures
should make them produce large amounts of EUV radiation.  EUVE data reveal that
unexpected elements - mostly iron - may work as a blanket which blocks the EUV
radiation and prevent it from escaping into space.

        This information promises important new results about the evolution of
stars into the white-dwarf stage and may help astronomers calculate the details
of how stars age and die, as our the sun will die when it becomes a white dwarf
in about 5 billion years, according to the astronomers.

        What physical conditions describe the gas surrounding this solar
system?  The EUVE has allowed astronomers for the first time to observe ionized
helium (helium atoms that have lost one of their two electrons) in the gas that
floats among the sun and nearby stars.  The EUVE satellite's observations may
soon yield far better measurements of the density, temperature and ionization
state of this interstellar gas than have been possible until now.

        The Deep Survey Telescope on board EUVE has obtained the first direct
evidence that the gas and dust drifting among the stars in this galaxy emit a
faint glow in the EUV. EUVE observed an EUV "shadow" cast by this gas and dust
cloud.  The cloud lies in the direction of the constellation Taurus and is
believed to be approximately 200 light-years away.  Its location indicates to
astronomers that the hot, ionized gas of the local interstellar medium extends
much farther than previously thought.

Unraveling the Nature of Extragalactic Objects

        The first sky survey ever conducted in the entire EUV band of the
electromagnetic spectrum has revealed that some of the rarest, most exotic
objects in the universe -- BL Lacertae Objects (BL Lacs) -- are surprisingly
visible in the EUV. The finding, which will be discussed at this meeting,
brings scientists one step closer to puzzling out the mysterious nature of BL
Lacs.

        BL Lacs are comparatively rare and are theorized to be centered on
massive black holes.  By analyzing the EUV light given off by these objects,
scientists may learn more about the composition and velocities of matter
entering possible black holes.

        Active galactic nuclei (AGN) are another class of rare extragalactic
objects to be discussed at this meeting.  Many of the AGNs seen in previous
surveys either were detected weakly or not observed at all in the EUV. EUVE has
revealed that some AGNs are visible in the EUV because their central source of
energy is powerful enough to clear a path through the surrounding, otherwise
opaque neutral gas.

        The EUVE was launched June 7, 1992 to make the first survey of the
universe at all the wavelengths contained in the EUV band of the spectrum.  The
Center for Extreme Ultraviolet Astrophysics (CEA), under contract to NASA's
Goddard Space Flight Center, Greenbelt, Md., serves as the Science Operations
and Data Analysis Facility for EUVE. EUVE is part of NASA's Office of Space
Science's Explorer program in Washington, D.C.

- end -
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_10_10.TXT

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    The first line of the file:

6/7/93: Space Station Redesign Fact Sheets

     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_2_2_45_5.TXT

NEW STS-57 LAUNCH DATE

Ed Campion
Headquarters, Washington, D.C.                   June 7, 1993

Bruce Buckingham
Kennedy Space Center, Fla.

EDITORS NOTE

NASA SETS JUNE 20 AS NEW DATE FOR THE STS-57 SHUTTLE MISSION

     NASA managers today set June 20, 1993 as the new launch date for the next
flight of the Shuttle system.  The STS-57 mission will see Space Shuttle
Endeavour and her six person crew conduct a mission highlighted by the
retrieval of the European observation satellite EURECA and the first flight of
a commercial spacelab facility known as Spacehab.

     The decision to go with a June 20 date follows the completion of work to
remove and replace the liquid oxygen turbopump from Endeavour's #2 main engine.
The pump was changed out because of an issue which was raised with a part on
the pump.  The decision to remove and replace the pump delayed the launch of
Endeavour which was originally scheduled for June 3rd.

     The launch window on June 20 opens at 9:37 a.m.  EDT and extends for 1
hour and 11 minutes.  The limited launch window time is based on EURECA
retrieval requirements.  The mission duration is planned for 7 days.  However,
it may be extended by 1 day immediately after launch if projections calculated
at that time for electrical power consumption permit an extra day in space.
The extra day will give two members of Endeavour's crew the opportunity to
perform an extravehicular activity (EVA) or spacewalk.

     This will be the fourth flight of Space Shuttle Endeavour and the 56th
flight of the Space Shuttle system.

- end -



SPACELINK NOTE:  Previously issued launch delay and launch announcement
information relating to STS-57 follows below.


STS-57 LAUNCH DELAY ADVISORY

Ed Campion                                May 27, 1993
Headquarters, Washington, D.C.            6:00 p.m. EDT


Bruce Buckingham
Kennedy Space Center, Fla.


LAUNCH ADVISORY - JUNE 3 LAUNCH OF ENDEAVOUR POSTPONED

     NASA managers have decided to changeout Space Shuttle Endeavour's #2 main
engine liquid oxygen turbopump because of an issue which was raised with a part
on the pump.  The decision to remove and replace the pump will move the launch
of Endeavour on Shuttle Mission STS-57, originally scheduled for June 3, to
sometime around mid-June.  A firm launch date will be set after the replacement
pump has been installed and checked out.

     The specific issue with the turbopump is with one of two springs which are
designed to keep the pump's ball bearings in place and in their proper
positions.  During inspection of the pump, engineers discovered evidence of an
inspection etch mark in a high-stress region of the spring.  While there is
data which indicates the spring will work as designed, NASA managers decided to
replace the unit since they could not firmly determine that the pump would
operate in a safe manner.  If a spring were to fail, the rotor position may not
be held accurately and the potential exists for higher vibration.

     Springs are etched for a variety of reasons.  They are marked to document
individual serial numbers, to verify that materials penetration inspections
have been complete, and/or to note that the part has been used in ground test
operations.  The misplaced etch mark on Endeavour's engine was a penetration
verification stamp.

     The pumps on the main engines to be used on the upcoming flights of Space
Shuttle Discovery (STS-51/July 1993) and Space Shuttle Columbia (STS-58/Sept.
1993) will be examined as part of their pre-launch processing.

- end -



5/21/93:  JUNE 3 AS TARGET DATE FOR NEXT SHUTTLE MISSION

STS-57 LAUNCH ANNOUNCEMENT

Ed Campion                                   May 21, 1993
Headquarters, Washington, D.C.

Bruce Buckingham
Kennedy Space Center, Fla.


KSC RELEASE: 57 - 93

     NASA managers today set June 3, 1993 as the target date for the next
flight of the Shuttle system.  The mission, designated as STS-57, will see
Space Shuttle Endeavour and her six person crew conduct a mission highlighted
by the retrieval of the European observation satellite EURECA and the first
flight of a commercial spacelab facility known as Spacehab.

     The June 3 date is based on successful completion of work in progress to
understand the cause of a noise/vibration event experienced during launch pad
processing.

     The launch window on June 3 opens at 6:17 p.m.  EDT and extends for 1 hour
and 11 minutes.  The limited launch window time is based on EURECA retrieval
requirements.  The mission duration is planned for 7 days.  However, it may be
extended by 1 day immediately after launch if projections calculated at that
time for electrical power consumption permit an extra day in space.  The extra
day will give two members of Endeavour's crew the opportunity to perform an
extravehicular activity (EVA) or spacewalk.

     The STS-57 EVA will be the second in a series of spacewalks designed to
refine training methods and expand the EVA experience level of astronauts,
flight controllers and instructors.  The STS-57 spacewalk also will assist in
refining several procedures being developed to service the Hubble Space
Telescope on Shuttle Mission STS-61 in December.

     Leading the STS-57 crew will be Mission Commander Ronald Grabe. Pilot for
the mission is Brian Duffy. Heading up the science team will be Payload
Commander David Low who is also designated as Mission Specialist-1. The three
other mission specialists for this flight are Nancy Sherlock (MS-2), Jeff
Wisoff (MS-3) and Janice Voss (MS-4).

     This will be the fourth flight of Space Shuttle Endeavour and the 56th
flight of the Space Shuttle system.
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
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