home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Space & Astronomy
/
Space and Astronomy (October 1993).iso
/
mac
/
TEXT_ZIP
/
daily
/
930417.ZIP
/
930417.DFC
Wrap
Text File
|
1993-04-17
|
7KB
|
132 lines
17-Apr-93 Daily File Collection
These files were added or updated between 16-Apr-93 at 21:00:00 {Central}
and 17-Apr-93 at 21:01:17.
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_44_12_40.TXT
STS-56 Status Report #22
MISSION CONTROL CENTER
Friday, April 16, 1993, 3 p.m. CDT
Investigators with the second Atmospheric Laboratory for Applications and
Science mission will be getting an additional 12 to 18 hours of solar and
atmospheric data as Discovery logs 500,000 more miles following this morning's
weather wave off.
The orbiter was maneuvered throughout the day to point the payload bay
instruments at the Sun and Earth to record and downlink solar and atmospheric
data. Many of the flight's secondary experiments, however, remained stowed
away with the crew making only periodic temperature checks.
In preparation for landing, the crew will deactivate the Spacelab pallet at
11:30 Houston time tonight and begin deorbit preparations at about 1:30 a.m.
CST tomorrow. The payload bay doors will be closed at about 3 a.m. CST, and
the deorbit burn dropping Discovery out of orbit will take place at about 5:30
a.m. CST, or about an hour prior to landing.
Weather conditions in Florida steadily improved throughout the day and are
expected to be favorable for tomorrow morning's landing opportunity at the
Kennedy Space Center. With high, scattered clouds and winds out of the
northwest, Discovery will approach the Shuttle Landing Facility runway from the
South, landing at 6:37 a.m. CST on Runway 33.
Two additional landing opportunities are available in California at the Edwards
Air Force Base facility at 8:04 a.m. and 9:38 a.m. CST. Weather in Southern
California is also expected to be excellent should one of those two
opportunities become necessary.
With a landing in Florida completing 148 orbits of the Earth, Discovery and
crew will have traveled 3,850,000 miles.
* * *
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_44_12_41.TXT
ATLAS 2 Public Affairs Status Report #18
6:00 p.m. CDT, April 16, 1993
8/17:31 MET
Spacelab Mission Operations Control
Marshall Space Flight Center
Huntsville, Alabama
Five of the seven ATLAS 2 instruments took advantage of an extra
day in space to add to the very successful observations they have
made over the past eight days. The Spacelab had been shut down
late last night in anticipation of landing. Payload managers and
experiment teams at Spacelab Mission Operations Control began
putting their plan for reactivating the instruments into action
after a landing delay was announced at 4:15 a.m. CDT.
The data management team in Huntsville, Ala., also taking advantage
of the extra day, gradually activated payload communication links
in an effort to pinpoint the problem which prevented high-rate-data
downlinks during the mission. The Spacelab experiments
participating in today's observations were reactivated shortly
before noon.
The first two bonus science orbits were devoted to solar
observations. The Active Cavity Radiometer Irradiance Monitor
(ACRIM) and the Solar Constant (SOLCON) instrument took readings of
the total energy from the sun, while the Solar Spectrum (SOLSPEC)
experiment measured solar energy across the wavelength spectrum
from far ultraviolet to far infrared. There was a relatively low
level of solar sunspots at the beginning of ATLAS 2, and the sun
has been even quieter late in the mission. Observations made
without sunspot interference will provide excellent data for
post-mission comparison among solar instruments.
The Shuttle Solar Backscatter Ultraviolet (SSBUV) experiment
resumed Earth observations at around 7 a.m. this morning. It
switched to solar viewing for the two sun orbits, then back to
atmospheric studies for the rest of the mission. The additional
day in orbit provided the opportunity for SSBUV to conduct more
unique experiments. The science team reconfigured the SSBUV
wavelength drive to allow measurements of nitric oxide in the
mesosphere. Later this evening, SSBUV will operate in a sweep
wavelength mode, for measurements that may help determine how much
ultraviolet radiation is actually reaching the Earth.
Today's six extra orbits of atmospheric observations will allow the
Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment to
obtain several more observations of trace gases in the middle
atmosphere. During ATLAS 2, ATMOS will have half again as many
opportunities to record atmospheric data as they did during ATLAS
1. The additional day also is giving ATMOS the chance to record
sunsets further to the north than it had thus far, stretching its
range of sunset observations from the tip of South America almost
to the equator. "Any time we can extend the range of our
observations, we add to our understanding of the state of the
atmosphere," said ATMOS Principal Investigator Dr. Mike Gunson.
The Solar Ultraviolet Spectral Irradiance Monitor (SUSIM) team
chose not to collect extra data today. The instrument requires one
orbit of calibration at the beginning and one at the end of each
viewing period, so two solar orbits would not allow sufficient time
to take a full scientific data set. The Millimeter-Wave
Atmospheric Sounder (MAS) concluded operations yesterday, because
the stowed Remote Manipulator System arm blocks its field of view.
Atmospheric observations will continue until just before midnight,
when the crew will deactivate the payload once more in anticipation
of landing Saturday morning.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_44_12_42.TXT
4/17/93: STS-56 LANDING
SPACELINK NOTE: Discovery landed this morning at the Kennedy Space Center in
Florida. Preliminary times show main gear touchdown at 6:37:19 a.m. CDT,
nose gear touchdown at 6:33:34 a.m CDT, and wheel stop at 6:38:21 a.m. CDT. kd
CDT. Mission Elapsed Time (MET) was 9 days, 6 hours and 21 minutes. Orbits of
the Earth totaled 148, with 3,853,977 miles flown. Additional information will
be posted when available.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=END OF COLLECTION---COLLECTED 3 FILES---COMPLETED 21:14:21=--=