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"930224.DFC" (19754 bytes) was created on 02-24-93Enter {V}iew, {X}MODEM, {Y}MODEM, {K}ERMIT, ? for HELP, or {M}enu [V]...
24-Feb-93 Daily File Collection
These files were added or updated between 23-Feb-93 at 21:00:00 {Central}
and 24-Feb-93 at 21:03:47.
=--=--=START=--=--= NASA Spacelink File Name:930224.REL
2/24/93: NASA TO BRIEF PRESS ON TOPEX/POSEIDON MISSION
Brian Dunbar
Headquarters, Washington, D.C. Feb. 24, 1993
Bob MacMillin
Jet Propulsion Laboratory, Pasadena, Calif.
N93-08: NOTE TO EDITORS
New findings on the El Nino ocean current will be among topics discussed at
a press conference on the TOPEX/Poseidon satellite mission on Friday, Feb. 26,
at 1 p.m. EST, in the von Karman Auditorium at NASA's Jet Propulsion
Laboratory, Pasadena, Calif.
Scientists will discuss initial results from the U.S.-French TOPEX/Poseidon
satellite, which was launched Aug. 10, 1992, to map circulation of the world's
oceans and study the oceans' role in climate. The press conference comes at
the end of a week-long conference attended by more than 150 TOPEX/Poseidon
scientists and oceanographers from around the world.
Participants will include Charles Yamarone Jr., JPL Project Manager; Dr.
Lee-Lueng Fu, JPL Project Scientist; Dr. William Patzert, NASA Program
Scientist; Michel Dorrer, French Project Manager; Michel Lefebvre, French
Project Scientist; Jean-Francois Minster of the Centre National d'Etudes
Spatiales, Toulouse, France; and James Mitchell of the Naval Oceanographic and
Atmospheric Research Laboratory in Mississippi.
They will present results of the mission's verification phase, including
the first map of ocean topography and a video animation of the global ocean
current systems mapped by TOPEX/Poseidon.
The press conference will be broadcast live on NASA Select television
with two-way audio from other NASA centers. NASA Select is carried on Satcom
F2R, transponder 13, 72 degrees west longitude, C-band, frequency 3960 MHz,
audio subcarrier 6.8 MHz, vertical polarization.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:930224.SHU
KSC SHUTTLE STATUS 2/24/93
SPACE SHUTTLE DAILY STATUS-STS 55
Wednesday, February 24, 1993
George H. Diller
Kennedy Space Center
407/867-2468
Vehicle: OV-102/Orbiter Columbia Mission: STS-55
Current location: Pad 39-A Orbital altitude: 184 sm
Payload: Spacelab D-2 Inclination: 28.45 degrees
Launch timeframe: March wk 2 Nominal Landing: KSC
Mission Duration: 8 days 22 hours Crew size: 7
STS-55 IN WORK:
- liquid oxygen high pressure turbopump connections and securing
- troubleshooting enhanced orbiter refrigerator/freezer unit
- potable water sampling
- GAS can experiment removal preparations for battery charging
STS-55 WORK SCHEDULED:
- remove GAS experiments on Friday
- reinstall GAUS film magazine Saturday
- Flight Readiness Test of main engines/aerosurfaces Sat./Sun.
- install main engine heat shields starting Sunday
- load orbiter mass memory units Monday
- Helium Signature leak checks Mon./Tues.
STS-55 WORK COMPLETED:
- removal of GAUS experiment film magazine for servicing
NOTES: A launch date for STS-55 is expected to be set on Friday.
# # #
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:930224.SKD
DAILY NEWS/TV SKED 2/24/1993
Daily News
Wednesday, February 24, 1993
Two Independence Square, Washington, D.C. Audio service: 202/358-3014
% Work Continues on Space Shuttle Discovery, STS-56;
% STS-54 crew will go to White House tomorrow;
% Stennis to unveil ISEF poster;
% GSFC highlights African-American History Month.
Technicians at Kennedy Space Center plan to remove the main engines and close
the payload bay doors on Space Shuttle Discovery today in preparation for
STS-56. Discovery is expected to be rolled over to the VAB next Wednesday. An
April launch for STS-56 is still scheduled.
* * * * * * * * * * * * * * * * Tomorrow, Feb. 25, the STS-54 crew -- John
Casper, Commander; Donald McMonagle, Pilot; Gregory Harbaugh, Mission
Specialist; Mario Runco, Jr., Mission Specialist and Susan Helms, Mission
Specialist -- will visit the White House. They will meet with President Clinton
and will present him with a number of items including a replica of the Liberty
Bell that flew on STS-54. After the presentation, the crew and their spouses
will be taken on a tour of the White House. Administrator Dan Goldin will
accompany the crew.
* * * * * * * * * * * * * * * *
On Thursday, February 25, the Stennis Space Center will host a press conference
to unveil the 1993 International Science and Engineering Fair poster which is
manifested to fly aboard STS-55, Columbia. The ISEF will be held on the
Mississippi Gulf Coast in May, and Stennis will be the site of the opening
ceremonies set for May 10.
* * * * * * * * * * * * * * * *
To highlight African-American History Month, Goddard Space Flight Center hosted
about 200 students from area schools to listen to a lecture by Dr. Benjamin S.
Carson. Dr. Carson is Director of Pediatric Neurosurgery at the Johns Hopkins
Medical Institute. Dr. Carson gained fame when he separated the Binder Siamese
twins from Germany in 1987.
* * * * * * * * * * * * * * * *
Here's the broadcast schedule for Public Affairs events on NASA Select TV. Note
that all events and times may change without n are Eastern. Live indicates a
program is transmitted live.
Wednesday February 24, 1993
Live 12:00 pm NASA Today news program
12:15 pm Aeronautics and Space Report.
12:30 pm Wonder Tools
1:00 pm Manned Flight Awareness: A Personal Commitment
1:30 pm NASA Bio-Satellite Program
2: 00 pm Starfinder #5
2:30 pm Our Laboratories in Space
3:00 pm TQM #43
NASA Select TV is broadcast on Satcom F2R, transponder 13, C-Band, 72 degrees
West Longitude, transponder frequency is 3960 MegaHertz, audio subcarrier is
6.8 MHz, polarization vertical.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_18_5.TXT
NOTE: This file is too large {26335 bytes} for inclusion in this collection.
The first line of the file:
- Current Two-Line Element Sets #148 -
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_45.TXT
ULYSSES MISSION OPERATIONS REPORT No. 127
PERIOD: 26th January to 1st February 1993
1. MISSION OPERATIONS
Experiment reconfigurations have been carried out as
required.
On 27th January, a HED calibration was performed.
A KEP EPAC in-flight calibration was conducted on 1st
February.
The BAM-I matrix was also changed from 1 to 0 on 1st
February.
Routine Earth pointing manoeuvres were performed on 26th,
28th and 31st January.
An average of 98.1 % data recovery was achieved during the
reporting period.
The percentage of data acquired as a function of bit rate is
as follows:
1024 bps 50.6 %
512 bps 47.5 %
2. SPACECRAFT STATUS
POWER
Nominal.
Estimated S/C power consumption 257 watts.
AOCS
Nominal.
TTC
The spacecraft is currently configured with receiver 2 as
the prime unit fed via the high gain antenna and with
receiver 1 as backup fed through the low gain antenna (LGA-
F). The downlink is provided through EPC2/TWTA2.
The 34 meter ground stations are in use to support TTC
operations. Ranging from 34 meter ground stations is
performed when the spacecraft is configured for bit rates of
1024 bps or less. Ranging passes from 70 meter ground
stations are also being taken periodically.
Received downlink level -137 dBm.(34 meter) X-band.
(Variations of up to 10 db. can be expected as a result of
station antenna in use, local weather conditions, and
spacecraft antenna off-pointing).
Received uplink level -124 dBm.
DATA HANDLING
Nominal.
THERMAL
Nominal.
3. FLIGHT DYNAMICS
Solar Aspect The angle reduced from 8.31 on
Angle (deg.) 26th January to 7.36 on 1st February.
Sun-Probe-Earth The angle reduced from 8.27 on Angle (deg.)
26th January to 7.46 on 1st February.
Spin Rate 4.980 rpm.
4. ORBITAL DATA
Data taken at 13:00 PDT on 1st February.
Distance from Earth 630,006,850 km.
Velocity relative to the Earth 119,819 km/hr.
Velocity relative to the Sun 34,632 km/hr.
Ecliptic latitude 17.5 deg/south
5. PLANNED OPERATIONS
Routine data gathering operations will continue together
with experiment reconfigurations as required.
On 8th February a KEP EPAC in-flight calibration will be
carried out and a RAM dump will be performed the following
day.
An HET calibration will be performed on 2nd February.
Earth pointing manoeuvres will be performed on 2nd, 4th and
6th January.
Periods of 2048 bps at low antenna elevations will now be
avoided only when using DSS42, which shows poorer
performance due to larger tracking errors. Playback at low
elevations will, however, continue to be avoided.
6. GROUND SEGMENT
The ground segment performed nominally during the reporting
period with the exception of a subreflector focusing problem
at DSS12 on 30th January, resulting in a 26 minute real-time
data loss.
Upgrades to the ground communications system started during
the reporting period with a switch from Area Routing
Assemblies (ARA) to Station Communications Processors (SCP)
on 28th January. Both uplink and downlink are now routed
via SCPs.
ULYSSES MISSION OPERATIONS REPORT No. 128
PERIOD: 2nd February to 8th February 1993
1. MISSION OPERATIONS
Experiment reconfigurations have been carried out as
required.
On 2nd February a HET calibration and a KEP RAM dump were
carried out.
On 3rd February a HET reset occurred.
On 8th February a KEP EPAC in flight calibration was carried
out.
Routine Earth pointing manoeuvres were performed on 2nd, 4th
and 6th February.
An average of 98.2 % data recovery was achieved during the
reporting period.
The percentage of data acquired as a function of bit rate is
as follows:
1024 bps 46.9 %
512 bps 51.2 %
2. SPACECRAFT STATUS
POWER
Nominal.
Estimated S/C power consumption 257 watts.
AOCS
Nominal.
TTC
The spacecraft is currently configured with receiver 2 as
the prime unit fed via the high gain antenna and with
receiver 1 as backup fed through the low gain antenna (LGA-
F). The downlink is provided through EPC2/TWTA2.
The 34 meter ground stations are in use to support TTC
operations. Ranging from 34 meter ground stations is
performed when the spacecraft is configured for bit rates of
1024 bps or less. Ranging passes from 70 meter ground
stations are also being taken periodically.
Received downlink level -137 dBm.(34 meter) X-band.
(Variations of up to 10 db. can be expected as a result of
station antenna in use, local weather conditions, and
spacecraft antenna off-pointing).
Received uplink level -123 dBm.
DATA HANDLING
Nominal.
THERMAL
Nominal.
3. FLIGHT DYNAMICS
Solar Aspect The angle reduced from 7.12 on
Angle (deg.) 2nd February to 6.47 on 8th February.
Sun-Probe-Earth The angle reduced from 7.32 on
Angle (deg.) 2nd February to 6.48 on 8th February.
Spin Rate 4.980 rpm.
4. ORBITAL DATA
Data taken at 13:00 PDT on 8th February.
Distance from Earth 619,071,989 km.
Velocity relative to the Earth 116,985 km/hr.
Velocity relative to the Sun 34,876 km/hr.
Ecliptic latitude 17.9 deg/south
5. PLANNED OPERATIONS
Routine data gathering operations will continue together
with experiment reconfigurations as required.
On 9th February a Tape Recorder 2 tape length test will
commence.
On 15th February a KEP EPAC in flight calibration will be
carried out.
Earth pointing manoeuvres will be performed on 9th, 11th and
14th February.
Periods of 2048 bps at low antenna elevations will now be
avoided only when using DSS42, which shows poorer
performance due to larger tracking errors. Playback at low
elevations will, however, continue to be avoided.
6. GROUND SEGMENT
The ground segment performed nominally during the reporting
period.
ULYSSES MISSION OPERATIONS REPORT No. 129
PERIOD: 9th February to 15th February 1993
1. MISSION OPERATIONS
Experiment reconfigurations have been carried out as
required until the occurrence of DNEL.
On 9th February a Tape Recorder 2 tape length test was
carried out.
On 10th February a HED calibration was carried out.
On 14th February a DNEL (Disconnect Non-Essential Loads)
condition occurred on-board the spacecraft. This coincided
with the end of the planned routine Earth pointing
manoeuvre. This was followed by activation of the on-board
REC program. The last frame of telemetry was received at
00:57 UTC. The appropriate commands were transmitted and
telemetry from the spacecraft was re-gained at 06:03 UTC.
Health checks confirmed that the spacecraft had reconfigured
itself correctly.
Main switch closure was initiated by ground command at 07:50
UTC. This was followed by the switch on of experiment
heaters. After reconfiguration of the on-board protection
logic, switch on of instrument converters commenced. This
was completed by 15:08 UTC.
During successive passes the spacecraft platform was
configured back to its nominal operationg configuration and
experiment switch on continued.
Routine Earth pointing manoeuvres were performed on 9th,
11th and 14th February.
An average of 92.23 % data recovery was achieved during the
reporting period.
The percentage of data acquired as a function of bit rate is
as follows:
1024 bps 37.23 %
512 bps 54.97 %
Individual experiment data recovery is lower for the
reporting period due to the switch off of instruments.
2. SPACECRAFT STATUS
POWER
Nominal. DNEL ocurred but no cause observed in telemetry.
Estimated S/C power consumption 257 watts.
AOCS
Nominal. Redundant units were activated by on-board REC
program. Prime units re-selected by ground command.
TTC
The spacecraft is currently configured with receiver 2 as
the prime unit fed via the high gain antenna and with
receiver 1 as backup fed through the low gain antenna (LGA-
F). The downlink is provided through EPC2/TWTA2.
The 34 meter ground stations are in use to support TTC
operations. Ranging from 34 meter ground stations is
performed when the spacecraft is configured for bit rates of
1024 bps or less. Ranging passes from 70 meter ground
stations are also being taken periodically.
Received downlink level -137 dBm.(34 meter) X-band.
(Variations of up to 10 db. can be expected as a result of
station antenna in use, local weather conditions, and
spacecraft antenna off-pointing).
Received uplink level -124 dBm.
DATA HANDLING
Nominal. On-board REC program activated correctly following
DNEL.
THERMAL
Nominal.
3. FLIGHT DYNAMICS
Solar Aspect The angle reduced from 6.22 on
Angle (deg.) 9th February to 5.57 on 15th February.
Sun-Probe-Earth The angle reduced from 6.34 on
Angle (deg.) 9th February to 5.52 on 15th February.
Spin Rate 4.979 rpm.
4. ORBITAL DATA
Data taken at 13:00 PDT on 15th February.
Distance from Earth 610,359,071 km.
Velocity relative to the Earth 114,678 km/hr.
Velocity relative to the Sun 35,093 km/hr.
Ecliptic latitude 18.2 deg/south
5. PLANNED OPERATIONS
Routine data gathering operations will continue together
with experiment reconfigurations as required.
Activities will continue to return the spacecraft payload to
its nominal operational configuration. It is expected that
this activity will be complete by 18th February.
Earth pointing manoeuvres will be carried out on 16th, 18th
and 21st February.
Periods of 2048 bps at low antenna elevations will now be
avoided only when using DSS42, which shows poorer
performance due to larger tracking errors. Playback at low
elevations will, however, continue to be avoided.
6. GROUND SEGMENT
The ground segment performed nominally during the reporting
period.
ULYSSES MISSION STATUS REPORT
February 16, 1993
PUBLIC INFORMATION OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE TECHNOLOGY
PASADENA, CALIF. 91109
The Ulysses spacecraft went into an automatic safe mode at about 4:50 p.m.
Pacific Standard Time on Sunday, Feb. 14, while it was being tracked by the
Deep Space Network facility near Madrid, Spain. All instruments were
automatically switched off by on-board computers, followed by switch-off of
spacecraft telemetry. The loss of communication lasted about five hours and 10
minutes.
Once the telemetry was regained, spacecraft health checks confirmed that
Ulysses had reconfigured itself correctly. An investigation into the cause of
the anomaly was under way.
Progress has been made to restore the spacecraft to its normal operational
condition. Three of the spacecraft's nine science instruments are now fully
operational. All but one of the remaining instruments were expected to be
restored during the next tracking pass over the Goldstone Deep Space Network
facility, which was completed at about 10 a.m. today. The Solar Wind Ion
Composition experiment operates at high voltage and requires additional time to
be switched on.
Today Ulysses is approximately 610 million kilometers (379 million miles)
from Earth, traveling at a heliocentric velocity of about 35,000 kilometers per
hour (22,000 miles per hour). The spacecraft is about 18 degrees south of the
ecliptic plane, slowly looping its way back toward the sun, where it will begin
its primary mission in June 1994 of studying the sun's poles. One-way light
time to Earth is about 38 minutes.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=END OF COLLECTION---COLLECTED 5 FILES---COMPLETED 21:17:25=--=