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"930118.DFC" (16194 bytes) was created on 01-18-93
18-Jan-93 Daily File Collection
These files were added or updated between 17-Jan-93 at 21:00:00 {Central}
and 18-Jan-93 at 21:01:58.
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_42_11.TXT
SPACE SHUTTLE ENDEAVOUR SCHEDULED TO LAND AT KSC TOMORROW MORNING
Mitch Varnes January 18, 1993
KSC Release No. 7-93
Nearly six days after rocketing into space on the year's first
Shuttle mission, the orbiter Endeavour is preparing to return
home tomorrow morning.
Endeavour is now scheduled to land at the Shuttle Landing
Facility (SLF) at 7:02 a.m. EST on Tuesday. The deorbit burn to
bring Endeavour back to Earth is planned to take place at 6:02
a.m., one hour before landing.
The second of KSC's two landing opportunities on Tuesday is at
8:38 a.m. EST. Endeavour also has a chance to land at Edwards
Air Force Base, Calif., at 10:05 EST tomorrow morning.
Flight controllers are aiming to bring Endeavour home on the ini-
tial KSC landing opportunity. If the weather cooperates on the
first try, Endeavour will reenter Earth's atmosphere over the
South Pacific and head eastward toward the three-mile-long
Shuttle runway. Endeavour will soar over Baja California,
Mexico, southern Texas and the Gulf of Mexico before reaching the
west central Florida coast. Mission commander John Casper will
then guide Endeavour high across Orlando and Titusville before
bringing the ship in for a landing onto the concrete runway.
Endeavour's twin sonic booms should be audible over much of
Central Florida.
NASA's newest spaceship roared away from KSC launch pad 39-B on
Wednesday, January 13 at 8:59 a.m. EST. STS-54 is the third
flight of Endeavour and the 53rd Space Shuttle mission. En-
deavour will next fly on mission STS-57, now targeted for launch
in late spring of this year.
# # # # #
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_42_5.TXT
STS-54 TV SKED, REV H
***********************************************************************
NASA SELECT TV SCHEDULE
STS-54 TDRS/IUS/DXS
Rev H
January 18, 1993
***********************************************************************
NASA Select programming can be accessed through GE Satcom F2R,
transponder 13. The frequency is 3960 MHz with an orbital position
of 72 degrees west longitude. This is a full transponder service
and will be operational 24 hours a day.
Two hour edited programs of each flight day will be replayed for Hawaii
and Alaska on Galaxy 6, transponder 19, channel 19. The orbital
position is 99 degrees west longitude, with a frequency of 4080 MHz.
Audio is 6.2 and 6.8 MHz. The programs will begin on launch day and
continue through landing, airing at 11 pm Central time.
This NASA Select Television schedule of mission coverage is available
on Comstore, the mission TV schedule computer bulletin board service.
Call 713-483-5817, and follow the prompts to access this service.
Launch occurred at 7:59 am Central Time, January 13.
* Denotes change from previous revision.
------------------------ Monday, January 18 ---------------------------
FD6
ORBIT SUBJECT SITE MET CST
84 CREW SLEEP 05/06:00 01:59 PM
88 REPLAY OF FD 6 ACTIVITIES JSC 05/11:01 07:00 PM
90 CREW WAKEUP 05/14:00 09:59 PM
------------------------- Tuesday, January 19 -------------------------
FD7
92 * Ku BAND STOW 05/17:13 01:12 AM
(NOT TELEVISED)
94 * DE-ORBIT BURN 05/21:03 05:02 AM
(NOT TELEVISED)
95 * LANDING AT KSC KSC 05/22:03 06:02 AM
LANDING REPLAYS KSC 06:15 AM
POST LANDING PRESS CONFERENCE KSC TBD TBD
***********************************************************************
Definition of Terms
***********************************************************************
CST: Central Standard Time
DXS: Diffuse X-ray Spectrometer Payload
FD: Flight Day
IUS: Inertial Upper Stage
JSC: Johnson Space Center
KSC: Kennedy Space Center
Ku: Ku Band Communications Antenna
MET: Mission Elapsed Time: day/hour/minute
STS: Shuttle Transportation System
TBD: To be decided
TDRS: Tracking And Data Relay Satellite Payload
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_42_7.TXT
STS-54 element set GSFC-018 (Orbit 76)
STS-54
1 22313U 93 3 A 93 18.28241927 0.00057457 00000-0 18286-3 0 180
2 22313 28.4722 119.8003 0012425 287.9395 71.9861 15.89505568 764
Satellite: STS-54
Catalog number: 22313
Epoch time: 93018.28241927 (18 JAN 93 06:46:41.03 UTC)
Element set: GSFC-018
Inclination: 28.4722 deg
RA of node: 119.8003 deg Space Shuttle Flight STS-54
Eccentricity: 0.0012425 Keplerian Elements
Arg of perigee: 287.9395 deg
Mean anomaly: 71.9861 deg
Mean motion: 15.89505568 rev/day Semi-major Axis: 6681.8004 Km
Decay rate: 0.57E-03 rev/day*2 Apogee Alt: 311.71 Km
Epoch rev: 76 Perigee Alt: 295.11 Km
NOTE - This element set is based on NORAD element set # 018.
The spacecraft has been propagated to the next ascending
node, and the orbit number has been adjusted to bring it
into agreement with the NASA numbering convention.
R.A. Parise, Goddard Space Flight Center
G.L.CARMAN
STS-54
FLIGHT DAY 3 STATE VECTOR (ACTUAL)
ON ORBIT OPERATIONS
(Posted 01/15/93 by Bruce Williamson)
The following vector for the flight of STS-54 is provided by NASA
Johnson Space Center Flight Design and Dynamics Division for use in
ground track plotting programs. The vector is valid for flight
day three. The vector represents the trajectory of Endeavour after
the OMS-4 maneuver and during day 3.
Questions regarding these postings may be addressed to Roger Simpson,
Mail Code DM4, L. B. J. Space Center, Houston, Texas 77058,
Telephone (713) 483-1928.
Lift off Time : 1993/013/13:59:29.953
Lift off Date : 01/13/93
Vector Time (GMT) : 015/21:41:29.953
Vector Time (MET) : 002/07:42:00.000
Orbit Count : 38
Weight : 208114.0 LBS
Drag Coefficient : 2.00
Drag Area : 1208.5 SQ FT
M50 Elements Keplerian Elements
----------------------- --------------------------
X = -20680135.9 FT A = 3610.7809 NM
Y = 1639987.3 FT E = 0.0007676
Z = 7088501.4 FT I (M50) = 28.63417 DEG
Xdot = 1194.599724 FT/S Wp (M50) = 40.31458 DEG
Ydot = -23680.577422 FT/S RAAN (M50) = 136.72294 DEG
Zdot = 8966.082576 FT/S / N (True) = 2.11858 DEG
Anomalies \ M (Mean) = 2.11533 DEG
Ha = 164.02804 NM
Hp = 162.04195 NM
Mean of 1950 (M50) : Inertial, right-handed Cartesian system whose
Coordinate System origin is the center of the earth. The epoch
is the beginning of the Besselian year 1950.
X axis: Mean vernal equinox of epoch
Z axis: Earth's mean rotational axis of epoch
Y axis: Completes right-hand system
A: Semi-major axis
E: Eccentricity N: True anomaly
I: Inclination M: Mean anomaly
Wp: Argument of perigee Ha: Height of apogee
RAAN: Right ascension of ascending node Hp: Height of perigee
POSTED BY JBWMSON AT VMSPFHOU ON VMSPFHOU.VMBOARDS:PAONEWS
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_42_9_15.TXT
MISSION CONTROL CENTER
STS-54 Status Report #11
Monday, January 18, 1993, 6 a.m. CST
Another step in certifying the Space Shuttle orbiter fleet for long duration
periods while docked to Space Station Freedom was conducted today when the crew
of Endeavour turned off one of the electricity-producing fuel cells.
Shutting down the fuel cells will be a routine occurrence in the space station
era since the shuttle's electricity can be provided by the orbiting laboratory.
Also today the orbiter was put through a complete checkout to ensure all
systems are ready for tomorrow's deorbit and landing at the Kennedy Space
Center in Florida or at Edwards Air Force Base in California.
Three landing opportunities are available Tuesday for Endeavour and the STS- 54
crew. Two at the Kennedy Space Center and one at Edwards. The KSC landing
times are 6:02 a.m. Central on orbit 95 and 7:38 a.m. Central completing 96
orbits. The Edwards landing opportunity is at 9:05 a.m. Central on orbit 97.
The forecast for tomorrow's opportunities shows acceptable weather at KSC with
a chance of some low clouds in the area due to a frontal passage and a slight
chance of ground fog. Conditions at Edwards are expected to be marginal with a
chance of overcast skies and ground fog possible.
Endeavour has continued to perform with no problems on its third trip in space,
orbiting the Earth every 90 minutes at an average altitude of 162 nautical
miles.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_42_9_16.TXT
DXS SCIENCE RESULTS
Brian Dunbar
Headquarters, Washington, D.C.
Dolores Beasley
Goddard Space Flight Center, Greenbelt, Md.
Terry Devitt
University of Wisconsin, Madison, Wis.
NASA-WISCONSIN EXPERIMENT LINKS X-RAYS TO SUPERNOVA
Astrophysicists analyzing preliminary data from a NASA-University of Wisconsin
instrument aboard the Space Shuttle Endeavour have obtained the first direct
evidence that mysterious X-rays from deep space emanate from clouds of
invisible gas.
The clouds of ionized, extremely hot gas, many scientists believe, were
produced long ago by cataclysmic supernova explosions.
Using a detector known as the Diffuse X-ray Spectrometer (DXS), astrophysicists
from the University of Wisconsin-Madison sampled faint X-rays that appear to be
a signal from a supernova event that occurred in the vicinity of our solar
system.
Since the beginning of X-ray astronomy in the early 1960s, scientists have
puzzled over the origins of the low-energy X-rays that emanate from seemingly
empty space, including a huge region around our solar system.
If scientists' ideas of how these enormous pockets of superheated gas came to
be is correct, then the X-ray signal detected by DXS may be coming from gas
heated by the blast wave of a supernova, said Dr. Wilton T. Sanders of the
University of Wisconsin- Madison, the DXS' principal investigator.
That supernova, which occurred approximately 300,000 years ago, likely created
a pulsating star known as Geminga as well as an expanding pocket of superhot
X-ray emitting gas that now surrounds our solar system and extends for several
hundred light years in all directions.
Recent observations from the German-American X-ray satellite ROSAT and NASA's
Compton Gamma Ray Observatory identified Geminga as a pulsar, a very dense,
rapidly rotating species of star associated with supernova events.
"What we are seeing is like an echo from the past," said Sanders. "For thirty
years, scientists have speculated about the origins of these X-rays and now
this echo, these faint X-rays that we're looking at, are starting to give us
some answers."
The X-rays being deciphered by the Wisconsin scientists seem to underpin a
theory put forward 20 years ago by UW-Madison scientists that the X-rays are
produced in vast clouds of superhot, ionized gas heated by supernova explosions
in our galaxy.
"We're looking at objects that are so hot they glow in X-rays, " said Sanders.
"They're hotter than white hot, they're hotter than blue hot. They're X-ray
hot, and that means that the temperatures of these clouds is something on the
order of a million degrees."
In addition to scanning the sky in the direction of Geminga, the DXS
detectors--a pair of extremely sensitive X-ray spectrometers mounted on
opposite sides of Endeavour's cargo bay--swept other regions of space. There
they detected X-rays who signature looks distinctly different from that of
Geminga, and could possibly be from a far older supernova event.
That supernova, which probably occurred millions of years ago, created a
similar gas bubble that is now much bigger than the one that may have been
caused by Geminga.
"So what we may be seeing with Geminga is the creation of a gas bubble within a
gas bubble," said Sanders. "The effect of Geminga would be to reheat and, if it
exploded near the edge of this region, enlarge the existing cavity in one
direction."
Sanders cautioned that while the DXS data look good, they are still preliminary
and will require extensive analysis before they can be presented to the
scientific community.
High counts of high-energy particles initially led to some problems with the
instrument early in the flight of STS-54, which was launched from the Kennedy
Space Center, Cape Canaveral, Fla., on Jan. 13. However, by purging the
detectors with gas and heating them, ground controllers at the Goddard Space
Flight Center (GSFC), Greenbelt, Md., were able to return the instruments to
operation. GSFC manages the DXS for NASA's Office of Space Science and
Applications.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_42_9_17.TXT
STS-54 Status Report #12
MISSION CONTROL CENTER
Monday, January 18, 1993, 2 p.m. CST
Endeavour's five-member crew stowed the orbiter's experiment equipment in
preparation for deorbit and landing operations Tuesday, should weather in
Florida or California permit.
STS-54 astronauts spent the afternoon preparing for the end of their six-day
flight. They also successfully restarted a fuel cell on-orbit for the first
time. The test, which was a demonstration of the capability to shut-down and
start a fuel cell, went nominally and Fuel Cell 2 is performing as expected.
In the Space Station Freedom era, the shuttle will be docked to the station for
a month or more at a time. This would require a power down of shuttle
equipment to conserve cryogenic fuels for producing electrical power. Today's
fuel cell test was the first in a series to demonstrate such a procedure.
Endeavour's third mission is scheduled to come to a close Tuesday, and the only
outstanding issue is weather at the landing sites. Forecasts call for
acceptable weather at Kennedy Space Center, Fla., with a chance of some low
clouds in the area due to a frontal passage and a slight chance of ground fog.
Conditions at Edwards Air Force Base, Calif., are expected to be marginal with
a chance of overcast skies and possible ground fog.
Three landing opportunities are available Tuesday -- two at KSC and one at
Edwards. The KSC landing times are 6:02 a.m. Central on orbit 95 and 7:38 a.m.
Central on orbit 96. The Edwards landing opportunity is at 9:05 a.m. Central
on orbit 97.
The crew will be awakened for landing day at 9:59 p.m. Central.
* * *
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=