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"930411.DFC" (27895 bytes) was created on 04-11-93
11-Apr-93 Daily File Collection
These files were added or updated between 10-Apr-93 at 21:00:00 {Central}
and 11-Apr-93 at 21:00:27.
=--=--=START=--=--= NASA Spacelink File Name:6_2_18_5.TXT
NOTE: This file is too large {29071 bytes} for inclusion in this collection.
The first line of the file:
- Current Two-Line Element Sets #171 -
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_44_12_16.TXT
STS-56 MCC Status Report 9
MISSION CONTROL STATUS REPORT #9
7 p.m. Saturday, April 10, 1993
Astronauts aboard Discovery reported making contact with the Russian Mir
Space Station this evening, the first such contact made between a shuttle and
Mir using amateur radio equipment.
Mission Specialist Mike Foale reported that the contact was brief, only long
enough to exchange greetings, before the connection was broken. He speculated
that the loss of contact was due to the Shuttle Amateur Radio Experiment
antenna having been pointed downward at the Earth instead of above at Mir,
which was in an orbit about 50 nautical miles higher than Discovery.
Orbit 3 Flight Director Bob Castle congratulated members of the flight control
team who had contributed to the success of the contact, saying that to his
knowledge it was the first success in after a number of unsuccessful attempts
on previous shuttle flights.
Earlier in the day, using an alternate telemetry path through Discovery's dish
antenna, flight controllers successfully dumped data through the orbiter's high
data rate recorder.
As Foale and Mission Specialst Ken Cameron took care of business aboard
Discovery on the Red Team shift, Commander Ken Cameron, Pilot Steve Oswald and
Mission Specialist Ellen Ochoa got a good night's sleep in preparation for
Sunday's 1 a.m. CDT deployment of the SPARTAN-201 free- flying platform.
Discovery's robot arm remained in an extended park position over the shuttle's
nose, ready for Ochoa to use it to grapple and deploy the satellite that will
study the Sun's corona and the solar wind for two days before being retrieved
Tuesday.
The Red Team continued Earth observations with the HERCULES camera and fixed
several samples in the Commercial MDA ITA Experiment's Bioprocessing Modules.
Discovery remains in a stable, 160 nautical mile high orbit circling the Earth
every 90 minutes.
* * *
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_44_12_17.TXT
STS-56 MISSION CONTROL STATUS #10
MISSION CONTROL CENTER
STS-56 Status Report #10
Sunday, April 11, 1993, 4:30 a.m. CDT
Discovery's crew flawlessly deployed the SPARTAN platform and its array of
sun-watching instruments on time today at 1:11 a.m. CDT.
SPARTAN will fly free for a little more than 48 hours, pointing the Solar Wind
Generation Experiment's instruments at features of the Sun, before Discovery
retrieves it and tucks it away in the cargo bay at about 2:17 a.m. CDT
Tuesday. The instruments will study features such as holes and streamers in the
Sun's corona, or outer atmosphere, and their effect on the speed and strength
of the solar wind, a stream of extremely hot gas composed of electrically
charged atoms that constantly floods the solar system. The solar wind is what
gives comets their tails and creates the Northern Lights when it encounters
Earth's magnetic field and upper atmosphere. At times, it can be strong enough
to interfere with satellite and radio communications on Earth.
The information gathered by SPARTAN's instruments will be tape recorded and
played back after they are returned to Earth since SPARTAN is totally automatic
and has no communications system.
Discovery is now about 16 miles behind SPARTAN and continuing to separate from
it by about 8 miles per orbit. It will continue that separation rate for the
next 21 hours before slowing.
After completing the deploy, Discovery's crew did a quick check to see if
interference from electronic devices in the cabin might be responsible for the
difficulties in sending high volume transmissions to the ground from the ATLAS'
ATMOS atmospheric instrument. However, with the electronic equipment turned
off, high-volume transmissions did not improve.
ATMOS information is still being recorded onboard and some is being transmitted
to the ground via a new transmitting format sent to Discovery that allows it to
be sent in a low-volume mode. Discovery is now in a 163 by 159 nautical mile
orbit, circling Earth every 90 minutes.
* * * * *
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_44_12_18.TXT
ATLAS 2 STATUS #7
ATLAS 2 Public Affairs Status Report #7
6:00 a.m. CDT, April 11, 1993
3/05:31 MET
Spacelab Mission Operations Control
Marshall Space Flight Center
Huntsville, Alabama
Scientific instruments for the second Atmospheric Laboratory for
Applications and Science (ATLAS 2) mission were put on standby for
for several hours last night while crew members released the
Spartan-201 satellite from the cargo bay of the Space Shuttle
Discovery.
Three ATLAS 2 instruments gathered information during the night to
improve our understanding of how the atmosphere responds to
chemical and solar variations. The Millimeter-wave Atmospheric
Sounder (MAS) experiment measured microwave radiation produced by
water vapor, chlorine monoxide and ozone in the Earth's atmosphere
and, prior to the SPARTAN deployment, spent over seven hours in
improved scan mode. Scientists made some tests of the instrument's
brightness pointing mode earlier in the shift. This worked very
well, and they are considering shifting to this data taking scheme
again later in the mission.
Changes in the atmosphere have been observed over the years, but
the causes of those changes are not fully understood. MAS is
designed to furnish a library of measurement data dealing with
effects of chlorofluorocarbons and related chemicals which release
chlorine into the atmosphere, possibly causing ozone depletion
under some conditions. Data from this joint German, Swiss and U.S.
experiment will be studied in conjunction with measurements from
the free-flying Upper Atmosphere Research satellite to construct a
more complete picture of the middle atmosphere.
The Shuttle Solar Backscatter Ultraviolet (SSBUV) experiment
provided ozone measurements that will be used to verify the
accuracy of similar instruments aboard free-flying NASA and
National Oceanic and Atmospheric Administration satellites. Housed
in two Get-Away-Special canisters on the side of the payload bay,
SSBUV measures solar radiation in 12 ultraviolet wavelengths
scattered back from the Earth's atmosphere. The instrument has
obtained a number of earth view orbits, all of which are of
excellent quality.
ATLAS 2 is the fifth mission for the SSBUV instrument.
Investigators will use pre- and postflight calibration
measurements, along with data from previous flights, to precisely
determine the instrument's characteristics and stability in order
to make accurate measurements of stratospheric ozone for comparison
with other space-based instruments.
The Atmospheric Trace Molecule Spectroscopy (ATMOS) measured solar
infrared radiation passing through the Earth's atmosphere at sunset
and sunrise. The ATMOS instrument uses an infrared spectrometer to
create spectra which can be read to determine the concentrations of
trace gases present in the area scanned. This information, coupled
with data from related experiments on balloons, rockets, satellites
and aircraft, will provide a reference source for atmospheric
scientists in the future.
A "tiger team" from Marshall Space Flight Center, Johnson Space
Center and Goddard Space Flight Center developed an option for
allowing some high rate ATMOS data to be captured on the Spacelab
High Data Rate Recorder and downlinked at a slower rate. This
option was evaluated by the ATLAS science team last night, and a
decision was made to implement the procedure following the SPARTAN
satellite release. It is expected that this will increase the
ATMOS experiment's overall data return for the mission.
The plan essentially calls for ATMOS sunrise data to continue to be
captured on the instrument's dedicated tape recorder. Some
selected orbital sunset observations will be stored on the Spacelab
High Data Rate Recorder and will subsequently be downlinked as
tracking and data relay satellite opportunities allow. Currently
four ATMOS observations have been captured on the Spacelab recorder
and plans are to downlink them during the next solar observing
period.
During the next 12 hours, the Solar Spectrum Measurement and Solar
Ultraviolet Spectral Irradiance Monitor instruments will study
ultraviolet wavelengths of sunlight, including the ultraviolet
region, which is the primary energy source for chemical reactions
in Earth's middle atmosphere. The Active Cavity Radiometer
Irradiance Monitor and the Measurement of Solar Constant
investigations will make further correlative measurements with the
Upper Atmosphere Research Satellite (UARS) and the European
Retrievable Carrier (EURECA) satellite to refine the value of the
total amount of solar energy reaching the Earth, an important
factor in the study of our climate.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_44_12_19.TXT
STS-56 MCC Status Report #11
MISSION CONTROL CENTER
STS-56 Status Report #11
Sunday, April 11, 1993, 11 a.m. CDT
Pilot Steve Oswald spent the day carefully maneuvering Discovery away from
the SPARTAN science satellite while keeping the Atmospheric Laboratory for
Applications and Science instruments pointed at the Sun for its scheduled
observations.
SPARTAN will operate away from the orbiter for about 48 hours, pointing its
instruments at the Sun and gathering science data on the solar wind that is
generated by the corona.
The solar wind is what gives comets their tails and creates the Northern Lights
when it encounters Earth's magnetic field and upper atmosphere. At times, it
can be strong enough to interfere with satellite and radio communications on
Earth.
Discovery's crew will begin a series of small maneuvers during the night to
begin the rendezvous phase with SPARTAN. Plans currently are to retrieve the
free-flying spacecraft and tuck it back into the payload bay shortly after 2
a.m. central Tuesday.
Currently Discovery is trailing SPARTAN by about 55 nautical miles and
separating at about eight nautical miles every hour and a half.
Early this morning, Ellen Ochoa activated the Solar Ultraviolet Experiment. The
small instrument is packaged inside a canister in the rear of the payload bay
and is designed to study the extreme ultraviolet solar radiation as it affects
the Earth's ionosphere. The experiment was designed, managed and built
entirely by students at the University of Colorado.
Mission Commander Ken Cameron made successful ham radio contacts with the
Lehigh Valley School in Allentown, Pennsylvania and Armand Bayou Elementary in
Houston. He had the added treat of talking with his son who attends the Armand
Bayou school.
Astronauts Ken Cockrell and Mike Foale took over operation of Discovery at
about noon when their three colleagues begain a sleep period.
Discovery is now in a 162 by 159 nautical mile orbit, circling the Earth every
90 minutes.
* * *
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_44_12_20.TXT
ATLAS-2 Status Report #8
ATLAS 2 Public Affairs Status Report #8
6:00 p.m. CDT, April 11, 1993
3/17:31 MET
Spacelab Mission Operations Control
Marshall Space Flight Center
Huntsville, Alabama
ATLAS 2 operations are proceeding smoothly on this fourth day of
the STS-56 mission. Scientists and engineers at Spacelab Mission
Operations Control in Huntsville are pleased with the quality of
information they have been able to review thus far, and they look
forward to more detailed analysis of their data in the weeks and
months ahead.
ATLAS 2 completed six orbits of solar observations at around 2 p.m.
CDT today. This was the second of four solar periods planned for
the mission.
The Active Cavity Radiometer Irradiance Monitor (ACRIM) and the
Solar Constant (SOLCON) experiment took readings of the total solar
energy coming to Earth. They made preliminary data comparisons
with each other, as well as with observations by nearly identical
instruments aboard the Upper Atmosphere Research Satellite (UARS)
and the European Retrievable Carrier (EURECA). Science teams said
that the rough comparisons were extremely good, indicating that
instruments measuring total solar irradiance on the satellites had
not experienced significant degradation.
ATLAS instruments take very reliable readings of the atmosphere and
the sun, since they are carefully calibrated against strict
laboratory standards before and after each flight. Yet these
readings are "snapshots" of only a few days' duration. Longterm
conditions are tracked by free-flying satellites, whose instruments
may be somewhat degraded by extended exposure to space. By
comparing the two measurements, scientists can determine the amount
of degradation in free-flying satellite readings. This allows them
to make accurte corrections, essential to tracking subtle changes
over time in atmospheric conditions and the solar energy which
influences them.
The Solar Spectrum (SOLSPEC) instrument again received excellent
data on the infrared, visible and ultraviolet radiation from the
sun. The information was sent back to the European Space Agency
facility in Brussels for analysis. The Naval Research Laboratory's
Solar Ultraviolet Spectral Irradiance Monitor (SUSIM) was
calibrated successfully, then received good real-time data during
the six solar orbits. The crew regularly interacted with the SUSIM
team to verify that their instrument was centered on the sun. The
SUSIM instrument aboard the UARS satellite has been decreasing in
sensitivity since UARS was placed in orbit. This is to be expected
since ultraviolet light, which SUSIM monitors, has a severe impact
on space instruments. Comparison with ATLAS readings gives
scientists an accurate yardstick for measuring that degradation.
The Shuttle Solar Backscatter Ultraviolet (SSBUV) experiment made
solar irradiance measurements during last two solar orbits and
reports that their instrument is operating "splendidly." The
Shuttle crew followed the standard procedure of pointing the cargo
bay toward deep space during nighttime portions of solar viewing
orbits, allowing the SSBUV instrument to cool. Temperature
control, important to successful operations, has been consistent
with pre-flight predictions throughout the mission. The science
team has used an improved capability for "quick-look" data analysis
during the mission to make rough comparisons of both solar and
ozone data with images taken from the NASA Total Ozone Mapping
Spectrometer aboard Russia's Meteor 3 satellite, as well as
comparisons of ATLAS 2 data with that taken during ATLAS 1.
After a two-hour break to allow an orbiter water dump, ATLAS-2
operations resumed about an hour ago with the cargo bay pointed
toward Earth for atmospheric observations. Also after the water
dump, SOLCON and SOLSPEC completed planned onboard calibrations to
further ensure the extreme accuracy required for their solar
irradiance measurements.
Data controllers took advantage of the solar viewing period to
downlink all the Atmospheric Trace Molecule Spectroscopy (ATMOS)
data which had been stored on the Spacelab High Data Rate Recorder
during last night's atmospheric observations. Real-time data from
the solar instruments was transmitted to the ground simultaneously
on another channel, partially confirming the viability of the
workaround approved last night for relaying ATMOS data. Some
planned television from the Shuttle is being rescheduled so
communications channels can be available for the ATMOS dowlinks.
The High Data Rate Recorder was empty and ready to retrieve more
sunset observations as this afternoon's atmospheric operations
began. The dedicated ATMOS recorder is about two-thirds full and
will continue to capture observations, giving priority to orbital
sunrises. ATMOS teams at Spacelab Control and at the Jet
Propulsion Laboratory are evaluating the quality of the downlinked
data they received. The capacity of the onboard recorder alone,
along with observations already downlinked to Spacelab control,
will allow ATMOS to make as many observations as they did during
the entire ATLAS 1 flight, a very successful mission for the
experiment.
The current atmospheric viewing period will continue until shortly
before midnight Monday.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_44_7.TXT
STS-56 element set GSFC-011a (orbit 52)
STS-56
1 22621U 93 23 A 93101.42729449 0.00057240 00000-0 17184-3 0 112
2 22621 57.0073 164.1203 0006381 283.1092 76.9272 15.91824663 522
Satellite: STS-56
Catalog number: 22621
Epoch time: 93101.42729449 (11 APR 93 10:15:18.24 UTC)
Element set: GSFC-011a
Inclination: 57.0073 deg
RA of node: 164.1203 deg Space Shuttle Flight STS-56
Eccentricity: 0.0006381 Keplerian Elements
Arg of perigee: 283.1092 deg
Mean anomaly: 76.9272 deg
Mean motion: 15.91824663 rev/day Semi-major Axis: 6675.3091 Km
Decay rate: 0.57E-03 rev/day*2 Apogee Alt: 301.18 Km
Epoch rev: 52 Perigee Alt: 292.66 Km
NOTE - This element set is based on NORAD element set # 011.
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-56
FLIGHT DAY 2 STATE VECTOR (ACTUAL)
ON ORBIT OPERATIONS
(Posted 04/09/93 by Bruce Williamson)
The following vector for the flight of STS-56 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 two. The vector represents the trajectory of Discovery after
the OMS-2 maneuver. Questions regarding these postings may be
addressed to Don Pearson, Mail Code DM4, L. B. J. Space Center,
Houston, Texas 77058, Telephone (713) 483-8052.
Lift off Time : 1993/098/05:28:59.950
Lift off Date : 04/08/93
Vector Time (GMT) : 099/13:30:00.00
Vector Time (MET) : 001/08:01:00.05
Orbit Count : 22
Weight : 224876.0 LBS
Drag Coefficient : 2.00
Drag Area : 2750.0 SQ FT
M50 Elements Keplerian Elements
----------------------- --------------------------
X = 4453511.8 FT A = 3599.8507 NM
Y = -12175603.3 FT E = 0.000537
Z = 17629159.4 FT I (M50) = 57.01746 DEG
Xdot = 24651.987451 FT/S Wp (M50) = 318.68275 DEG
Ydot = 430.344756 FT/S RAAN (M50) = 172.03355 DEG
Zdot = -5921.325652 FT/S / N (True) = 147.49768 DEG
Anomalies \ M (Mean) = 147.46460 DEG
Ha = 160.544 NM
Hp = 157.192 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_44_9.TXT
STS-56 TV SKED REV D
***********************************************************************
NASA SELECT TV SCHEDULE
STS-56/ATLAS-II/SPARTAN-201
4/11/93
REV D
***********************************************************************
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 11pm 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-Thursday, April 8, 1993 KSC 00/00:00 12:29 AM
------------------------ Sunday, April 11 ----------------------------
FD 4
ORBIT SUBJECT SITE MET CDT
----- ------- ---- --- ---
56 MISSION STATUS BRIEFING JSC 03/12:31 01:00 PM
MSFC
57 BLUE/RED (FD5) HANDOVER 03/12:45 01:14 PM
60 WEATHER CHANNEL INTERVIEW TDRW 03/17:15 05:44 PM
T=15:00
61 FD4 ACTIVITIES REPLAY JSC 03/18:31 07:00 PM
------------------------- Monday, April 12 ----------------------------
FD 5
65 SPARTAN RENDEZVOUS OPS BEGIN TDRW/E 04/00:36 01:05 AM
(TV opportunity)
65 RED/BLUE (FD5) HANDOVER 04/01:00 01:29 AM
71 MISSION UPDATE JSC 04/09:31 10:00 AM
72 MISSION STATUS BRIEFING JSC 04/12:31 01:00 PM
MSFC
73 BLUE/RED (FD6) HANDOVER 04/12:45 01:14 PM
76 SCI-FI CHANNEL INTERVIEW TDRW 04/17:25 05:54 PM
T=15:00
77 FD5 ACTIVITIES REPLAY JSC 04/18:31 07:00 PM
79 CONFIGURE Ku TO RADAR 04/21:45 10:14 PM
(not televised)
80 RED/BLUE (FD6) HANDOVER 04/23:15 11:44 PM
----------------------- Tuesday, April 13 -----------------------------
FD 6
80 SPARTAN RENDEZVOUS OPS 04/23:49 12:18 AM
Ti TIG
(not televised)
80 SPARTAN CAPTURE POSITION 04/23:57 12:26 AM
(not televised)
80 P/TV09 SPARTAN RETRIEVE OPS TDRW/E 05/00:00 12:29 AM
(may not be televised)
T=150:00
81 CONFIGURE Ku FOR COMM 05/01:30 01:59 AM
(not televised)
81 SPARTAN GRAPPLE 05/01:48 02:17 AM
82 SPARTAN BERTH 05/02:00 02:29 AM
84 VTR DUMP TDRE 05/05:50 06:19 AM
SPARTAN RETRIEVE OPS
T=20:00
86 MISSION UPDATE JSC 05/09:31 10:00 AM
88 MISSION STATUS BRIEFING JSC 05/13:31 02:00 PM
MSFC
89 BLUE/RED (FD7) HANDOVER 05/13:45 02:14 PM
92 FD6 ACTIVITIES REPLAY JSC 05/18:31 07:00 PM
----------------------- Wednesday, April 14 ---------------------------
FD 7
97 RED/BLUE (FD7) HANDOVER 06/01:00 01:29 AM
99 P/TV10 CREW CONFERENCE TDRW 06/03:40 04:09 AM
WITH JSC/KSC/MSFC PARTICIPATION
T=15:00
102 MISSION UPDATE JSC 06/09:31 10:00 AM
103 CHANNEL ONE INTERVIEW TDRW 06/09:45 10:14 AM
T=15:00
104 WGN/CHICAGO MUSEUM TDRW 06/11:25 11:54 AM
OF SCIENCE & INDUSTRY INTERVIEW
T=15:00
106 BLUE/RED (FD8) HANDOVER 06/13:00 01:29 PM
104 MISSION STATUS BRIEFING JSC 06/13:31 02:00 PM
MSFC
108 FD7 ACTIVITIES REPLAY JSC 06/18:31 07:00 PM
----------------------- Thursday, April 15 ----------------------------
FD 8
114 RED/BLUE (FD8) HANDOVER 07/03:30 03:59 AM
118 MISSION UPDATE JSC 07/09:31 10:00 AM
120 MISSION STATUS BRIEFING JSC 07/13:31 02:00 PM
MSFC
123 BLUE/RED (FD9) HANDOVER 07/16:15 04:44 PM
124 FD8 ACTIVITIES REPLAY JSC 07/18:31 07:00 PM
------------------------ Friday, April 16 -----------------------------
FD 9
129 Ku BAND ANTENNA STOW 08/01:20 01:49 AM
(not televised)
131 DEORBIT BURN 08/05:05 05:34 AM
(not televised)
132 KSC LANDING KSC 08/05:58 06:27 AM
LANDING REPLAYS KSC TBD TBD
POST LANDING PRESS CONFERENCE KSC TBD TBD
***********************************************************************
DEFINITION OF TERMS
***********************************************************************
ACR: Active Cavity Radiometer
ATMOS: Atmospheric Trace Module Spectroscopy
CDT: Central Daytight Time
CST: Central Standard Time
DOD: Department of Defense
FD: Flight Day
JSC: Johnson Space Center
KSC: Kennedy Space Center
MAS: Millimeter Wave Atmospheric Sounder
MECO: Main engine cut-off
MET: Mission Elapsed Time. The time which begins at the moment
of launch and is read: days/hours:minutes. Launch=00/00:00
OPS: Operations
P/TV: Photographic/Television activity
RMS: Remote Manipulation System
SAREX: Shuttle Amateur Radio Experiment
SOLCON: Solar Constant Experiment
SOLSPEC: Solar Spectrum
SPARTAN: Solar Wind Generation Experiment
SSBUV: Shuttle Solar Backscatter Ultraviolet Experiment
SUSIM: Solar Ultraviolet Spectral Irradiance Monitor
STS: Space Transportation System
T=: Time equivalent; Used for duration of event.
TBD: To be determined.
TDRE,W: Tracking and Data Relay Satellite, East and West longitudes.
TIG: Terminal Initiation; on-orbit shuttle burn.
VTR: Videotape recorder.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
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