Space & Astronomy/Space and Astronomy (October 1993).iso/pc/text/daily_2/930423.dfc

Text File | 1993-04-24 | 64KB | 1,762 lines

"930423.DFC" (62140 bytes) was created on 04-23-93

23-Apr-93 Daily File Collection
   These files were added or updated between 22-Apr-93 at 21:00:00 {Central}
                                         and 23-Apr-93 at 21:00:54.

=--=--=START=--=--= NASA Spacelink File Name:930423.REL

4/23/93:  NASA STATEMENT ON ADVI80RY COMMITTEE MEETING

Jeff Vincent
Headquarters, Washington, D.C.                 April 22, 1993


NASA Administrator Daniel S. Goldin today announced that Bryan O'Connor, Deputy
Director of the Space Station Redesign Team, will manage the effort so that a
request by Dr. Joseph F. Shea, the team's leader, to reduce his workload can be
accommodated.

In a letter to Goldin today, Shea submitted his resignation as Assistant Deputy
Administrator for Space Station Analysis. He will transition to a role as
Special Advisor to the Administrator and advisor to O'Connor.

"I greatly appreciate Joe's help and willingness to continue to contribute to
an effort that is critical to this nation's future in space," Goldin said.

The Advisory Committee on the Redesign of the Space Station, chaired by Dr.
Charles M. Vest, held its first public meeting today in Arlington, Va. They
received a comprehensive status report from the NASA Redesign Team, including
an introductory presentation from Shea. Briefings also were presented on space
station missions and requirements; science, technology and engineering
research; current option development and plans; and by the international
partners on redesign considerations to date.

"Today's meeting of the Advisory Committee was extremely productive," Goldin
said. "The redesign effort is on track, and I am especially gratified by the
terrific job being done by Bryan O'Connor and the rest of the NASA Redesign
Team."
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:930423.SHU

KSC SHUTTLE STATUS 4-23

      KENNEDY SPACE CENTER SPACE SHUTTLE STATUS REPORT
                         STS-55 L-1 Day
                     Friday, April 23, 1993

KSC Contact: Bruce Buckingham


Mission: STS-55/SL-D2                 Orbital Altitude: 184 miles
Vehicle: Columbia/OV-102              Inclination: 28.45 degrees
Location: Launch Pad 39-A             Crew Size: 7
Mission Duration: 8 days/22 hours     KSC Landing: May 3
Launch Date: April 24                 Landing Time: 8:57 a.m.
Launch Window: 10:52 a.m. - 1:22 p.m.


     Operations at launch pad 39-A are continuing to run smoothly and without
problem for the launch of Space Shuttle Columbia on mission STS-55. Launch
remains on schedule to occur at the open- ing of the window at 10:52 a.m.
Saturday, April 24.

     The countdown clock is currently holding at T-11 hours.  This 12 hour, 32
minute built-in hold will last until 8:32 p.m. today.

     Rotation of the service structure away from the Shuttle vehicle remains
scheduled for 11:00 a.m.

     Following RSS rotation, crews will continue with the instal- lation of
time critical flight crew materials and perform pre- ingress switch list
checks.  Also, operations will commence to ac- tivate the fuel cells.

     This evening Mission Control, Houston, will configure and check
communication links between mission control, KSC, and the Shuttle Columbia.

     The countdown clock will enter the planned one hour hold at the T-6 hour
mark as last minute checks are made prior to loading the external tank with
over 500,000 gallons of liquid oxygen and liquid hydrogen propellants.  Once
the pad is clear of all person- nel, tanking will begin at about 2:30 a.m.
tomorrow.  Following the three hour tanking operation, the "ice team" will be
deployed to the pad for final assessments of the vehicle.

     The seven members of the flight crew have been divided into two shifts for
around-the-clock operations once in orbit.  The blue team consists of commander
Steve Nagel, pilot Tom Henricks, mission specialist Jerry Ross and payload
specialist Ulrich Wal- ter.  The red team is mission specialists Charles
Precourt and Bernard Harris, and payload specialist Hans Schlegel.

     The weather forecast for launch tomorrow is very optimistic with Air Force
forecasters allowing a zero percent probability of violating launch constraints
during the window that opens at 10:52 a.m.  The 24 hour and 48 hour delay
predictions show a 10 percent chance of violation each day.





           SUMMARY OF HOLDS AND HOLD TIMES FOR STS-55

T-27 hours --- 4 hour hold ----------- Thurs. 8:00 a.m. - 12 noon
T-19 hours --- 4 hour hold ----------- Thurs. 8:00 p.m. - 12 mid.
T-11 hours --- 12 hour, 32 min. hold - Fri. 8:00 a.m. - 8:32 p.m.
T-6 hours ---- 1 hour hold ----------- Sat. 1:32 a.m. - 2:32 a.m.
T-3 hours ---- 2 hour hold ----------- Sat. 5:32 a.m. - 7:32 a.m.
T-20 minutes - 10 minute hold -------- Sat. 10:12 a.m.-10:22 a.m.
T-9 minutes -- 10 minute hold -------- Sat. 10:33 a.m.-10:43 a.m.



          SUMMARY OF STS-55 LAUNCH DAY CREW ACTIVITIES

Saturday
5:42 a.m. -------- Wake up
6:12 a.m. -------- Breakfast/Dinner
6:32 a.m. -------- Don flight equipment (PS1, PS2)
6:57 a.m. -------- Weather briefing (CDR, PLT, MS2)
6:57 a.m. -------- Don flight equipment (MS1, MS3)
7:07 a.m. -------- Don flight equipment (CDR, PLT, MS2)
7:37 a.m. -------- Depart for launch pad 39-A
8:07 a.m. -------- Arrive at white room and begin ingress
9:22 a.m. -------- Close crew hatch
10:52 a.m. ------- Launch (April 24, 1993)



                     CREW FOR MISSION STS-55

Commander (CDR) Steve Nagel
Pilot (PLT) Tom Henricks
Mission Specialist (MS1) Jerry Ross
Mission Specialist (MS2) Charles Precourt
Mission Specialist (MS3) Bernard Harris
Payload Specialist (PS1) Ulrich Walter
Payload Specialist (PS2) Hans Schlegel



Blue Team:  Nagel, Henricks, Ross, Walter
Red Team:   Precourt, Harris, Schlegel

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

=--=--=START=--=--= NASA Spacelink File Name:930423A.REL

4/23/93:  HUBBLE TELESCOPE SERVICING MISSION SCHEDULED FOR ELEVEN DAYS

Ed Campion
Headquarters, Washington, D.C.
  Ap

Kyle Herring
Johnson Space Center, Houston

RELEASE:  93-76

        The December flight of Endeavour on Space Shuttle mission STS-61 to
service the Hubble Space Telescope (HST) has been scheduled as an 11 day
mission designed to accommodate a record five spacewalks with the capability
for an additional two, if needed.

        The decision to schedule five extravehicular activities, or EVAs, was
reached following extensive evaluations of underwater training, maneuver times
required using the Shuttle's robot arm based on software simulations and actual
EVA tasks on previous missions.

        "Basically what we've done by going to five EVAs rather than three is
to repackage our margin so that we have the capability to respond to the
dynamics, or unknowns, of spacewalks," Mission Director Randy Brinkley said.
"It improves the probabilities for mission success while providing added
flexibility and adaptability for reacting to real-time situations."

        In laying out the specific tasks to be completed on each of the
spacewalks, officials have determined that changing out the gyros, solar arrays
and the Wide Field/Planetary Camera (WF/PC) and installing the Corrective
Optics Space Telescope Axial Replacement (COSTAR) are priority objectives
during the mission.

        "When we looked at accomplishing all of the tasks, highest through
lowest priority, and recognizing that the major tasks -- gyros, solar arrays,
WF/PC and COSTAR -- would consume most of the time set aside for each
spacewalk, five EVAs were deemed appropriate," said Milt Heflin, Lead Flight
Director for the mission.

        While the five spacewalks will be unprecedented, the use of two
alternating spacewalk teams will alleviate placing more stress on the crew than
previous missions requiring two, three or four EVAs.

        "We have paid close attention to lessons learned during previous
spacewalks and factored these into our timeline estimates for five EVAs,"
Heflin said. "In planning for all Space Shuttle missions, it is necessary to
formulate a work schedule that represents as realistic a timeline as possible
to accomplish the mission objectives."

        Planning currently calls for at least five water tank training sessions
that include support from the Mission Control Center, called joint integrated
simulations, lasting between 10 and 36 hours.  In addition, many stand alone
underwater training "runs" will practice individual tasks in each spacewalk.

        Various refinements to the specific tasks on each spacewalk will be
made based on actual training experience during the months prior to the
mission.  Also, lessons learned from other spacewalks leading up to the flight
will be valuable in assisting the STS-61 crew in its training techniques.

        Endeavour's June flight and Discovery's July mission both will include
spacewalks to evaluate some of the unique tools to be used on the HST mission.
The evaluations will help in better understanding the differences between the
actual weightlessness of space and the ground training in the water tanks at
the Johnson Space Center, Houston, and the Marshall Space Flight Center,
Huntsville, Ala.

        Also, the inflight spacewalking experiences will assist in gaining
further insight into the time required for the various tasks and expand the
experience levels among the astronaut corps, the flight controllers and
trainers.

        Designed to be serviced by a Space Shuttle crew, Hubble was built with
grapple fixtures and handholds to assist in the capture and repair procedures.

        The telescope was launched aboard Discovery in April 1990.  At that
time the NASA mixed fleet manifest showed the first revisit mission to HST in
1993 to change out science instruments and make any repairs that may have
become necessary.
- end -
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:10_2_4.TXT

NASA FIELD CENTER TU OFFICES


FIELD CENTERS
Field Center Technology Utilization Officers manage center participation in
regional technology utilization activities.

NASA AMES RESEARCH CENTER
Mail Code 223-3
Moffett Field, CA  94035
Technology Utilization Officer:  Geoffrey S. Lee
Phone: [phone]

NASA GODDARD SPACE FLIGHT CENTER
Mail Code 702
Greenbelt, MD  20771
Technology Utilization Officer:  Dr. George Alcorn
Phone: [phone]

NASA LYNDON B. JOHNSON SPACE CENTER
Mail Code IC-4
Building 4 South
Houston, TX  77058
Technology Utilization Officer:  Richard B. Ramsell
Phone: [phone]

NASA JOHN F. KENNEDY SPACE CENTER
Mail Stop PT-PAT-A
Kennedy Space Center, FL  32899
Technology Utilization Officer:  James S. Aliberti
Phone: [phone]

NASA LANGLEY RESEARCH CENTER
Mail Stop 200
Hampton, VA  23665
Technology Utilization Officer:  Joseph J. Mathis, Jr.
Phone: [phone]

NASA LEWIS RESEARCH CENTER
Mail Stop 7-3
21000 Brookpark Road
Cleveland, OH  44135
Technology Utilization Officer:  Anthony F. Ratajczak
Phone: [phone]

NASA George C. Marshall Space Flight Center
Mail Code AT01
Huntsville, AL  35812
Director, Technology Utilization Office:  Ismail Akbay
Phone: [phone]


JET PROPULSION LABORATORY
NASA Resident Office
Mail Stop 180-801D
4800 Oak Grove Drive
Pasadena, CA  91009
Technology Utilization Officer:  Arif Husain
Phone: [phone]

Technology Utilization Manager for JPL:  Dr. Norman L Chalfin
Mail Stop 156-211
Phone: [phone]


NASA JOHN C. STENNIS SPACE CENTER
Mail Code HA-30
Stennis Space Center, MS  39529
Technology Utilization Officer:  Robert Barlow
Phone: [phone]

NASA HEADQUARTERS
Code CU
Washington, DC  20546
Technology Utilization Officer:  Leonard A. Ault
Phone: [phone]
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:10_2_8.TXT

Applications Teams


Public organizations facing problems in such areas as safety, health,
manufacturing or environmental protection can request assistance from a
Technology Application Team by contacting one of the two organizations
sponsored by NASA or by contacting the nearest NASA Center Technology
Utilization Office.  These teams are formed at NASA's discretion to help solve
public sector problems.  Staffed by professionals from various disciplines,
they work with the industrial community, medical sector and other government
agencies to identify problems that may be solved using existing NASA
technology.

Research Triangle Institute
P.O. Box 12194
Research Triangle Park
North Carolina 27709
Telephone: [phone]


For information, applications, research, training, and services relating to
satellite and aerial data for Earth resources, contact NASA's transfer point:

Technology Application Center
University of New Mexico
Suite 100
2500 Yale Blvd. SE
Albuquerque, NM 87131-6031
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_12_7.TXT

Mir element set #29 (23-Apr-93)

Mir
1 16609U 86 17  A 93113.36887761  .00012040  00000-0  16169-3 0   294
2 16609  51.6194 134.7731 0000169 122.7184 237.3832 15.58361501410588

Satellite: Mir
Catalog number: 16609
Epoch time:      93113.36887761
Element set:      29
Inclination:       51.6194 deg
RA of node:       134.7731 deg          Semi-major axis:  3655.7738 n.mi.
Eccentricity:    0.0000169              Apogee altitude:   211.9015 n.mi.
Arg of perigee:   122.7184 deg          Perigee altitude:  211.7779 n.mi.
Mean anomaly:     237.3832 deg          Altitude decay:      0.0188 n.mi./day
Mean motion:   15.58361501 rev/day      Apsidal rotation:    3.7442 deg/day
Decay rate:     1.2040E-04 rev/day~2    Nodal regression:   -5.0130 deg/day
Epoch rev:           41058              Nodal period:       92.3431 min

G.L.CARMAN
     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 {30591 bytes} for inclusion in this collection.
    The first line of the file:

- Current Two-Line Element Sets #180 -

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

=--=--=START=--=--= NASA Spacelink File Name:6_2_2_43_3.TXT

STS-55 LAUNCH STATUS  4/23/93

      KENNEDY SPACE CENTER SPACE SHUTTLE STATUS REPORT
                         STS-55 L-1 Day
                     Friday, April 23, 1993

KSC Contact: Bruce Buckingham


Mission: STS-55/SL-D2                 Orbital Altitude: 184 miles
Vehicle: Columbia/OV-102              Inclination: 28.45 degrees
Location: Launch Pad 39-A             Crew Size: 7
Mission Duration: 8 days/22 hours     KSC Landing: May 3
Launch Date: April 24                 Landing Time: 8:57 a.m.
Launch Window: 10:52 a.m. - 1:22 p.m.


     Operations at launch pad 39-A are continuing to run smoothly and without
problem for the launch of Space Shuttle Columbia on mission STS-55. Launch
remains on schedule to occur at the open- ing of the window at 10:52 a.m.
Saturday, April 24.

     The countdown clock is currently holding at T-11 hours.  This 12 hour, 32
minute built-in hold will last until 8:32 p.m. today.

     Rotation of the service structure away from the Shuttle vehicle remains
scheduled for 11:00 a.m.

     Following RSS rotation, crews will continue with the instal- lation of
time critical flight crew materials and perform pre- ingress switch list
checks.  Also, operations will commence to ac- tivate the fuel cells.

     This evening Mission Control, Houston, will configure and check
communication links between mission control, KSC, and the Shuttle Columbia.

     The countdown clock will enter the planned one hour hold at the T-6 hour
mark as last minute checks are made prior to loading the external tank with
over 500,000 gallons of liquid oxygen and liquid hydrogen propellants.  Once
the pad is clear of all person- nel, tanking will begin at about 2:30 a.m.
tomorrow.  Following the three hour tanking operation, the "ice team" will be
deployed to the pad for final assessments of the vehicle.

     The seven members of the flight crew have been divided into two shifts for
around-the-clock operations once in orbit.  The blue team consists of commander
Steve Nagel, pilot Tom Henricks, mission specialist Jerry Ross and payload
specialist Ulrich Wal- ter.  The red team is mission specialists Charles
Precourt and Bernard Harris, and payload specialist Hans Schlegel.

     The weather forecast for launch tomorrow is very optimistic with Air Force
forecasters allowing a zero percent probability of violating launch constraints
during the window that opens at 10:52 a.m.  The 24 hour and 48 hour delay
predictions show a 10 percent chance of violation each day.





           SUMMARY OF HOLDS AND HOLD TIMES FOR STS-55

T-27 hours --- 4 hour hold ----------- Thurs. 8:00 a.m. - 12 noon
T-19 hours --- 4 hour hold ----------- Thurs. 8:00 p.m. - 12 mid.
T-11 hours --- 12 hour, 32 min. hold - Fri. 8:00 a.m. - 8:32 p.m.
T-6 hours ---- 1 hour hold ----------- Sat. 1:32 a.m. - 2:32 a.m.
T-3 hours ---- 2 hour hold ----------- Sat. 5:32 a.m. - 7:32 a.m.
T-20 minutes - 10 minute hold -------- Sat. 10:12 a.m.-10:22 a.m.
T-9 minutes -- 10 minute hold -------- Sat. 10:33 a.m.-10:43 a.m.



          SUMMARY OF STS-55 LAUNCH DAY CREW ACTIVITIES

Saturday
5:42 a.m. -------- Wake up
6:12 a.m. -------- Breakfast/Dinner
6:32 a.m. -------- Don flight equipment (PS1, PS2)
6:57 a.m. -------- Weather briefing (CDR, PLT, MS2)
6:57 a.m. -------- Don flight equipment (MS1, MS3)
7:07 a.m. -------- Don flight equipment (CDR, PLT, MS2)
7:37 a.m. -------- Depart for launch pad 39-A
8:07 a.m. -------- Arrive at white room and begin ingress
9:22 a.m. -------- Close crew hatch
10:52 a.m. ------- Launch (April 24, 1993)



                     CREW FOR MISSION STS-55

Commander (CDR) Steve Nagel
Pilot (PLT) Tom Henricks
Mission Specialist (MS1) Jerry Ross
Mission Specialist (MS2) Charles Precourt
Mission Specialist (MS3) Bernard Harris
Payload Specialist (PS1) Ulrich Walter
Payload Specialist (PS2) Hans Schlegel



Blue Team:  Nagel, Henricks, Ross, Walter
Red Team:   Precourt, Harris, Schlegel






STS-55 LAUNCH DELAY

3/30/93: ATLAS 2 LAUNCH DATE SET, SPACELAB D-2 MISSION RESCHEDULED



Ed Campion
Headquarters, Washington, D.C.         March 30, 1993


LAUNCH ADVISORY

     NASA today announced that Space Shuttle Discovery with the
STS-56/ATLAS 2 payload will be the next mission to fly with
launch scheduled for April 6, 1993 at 1:32 a.m.  EDT. Space
Shuttle Columbia and the STS-55/Spacelab D-2 payload, which
experienced a launch scrub on March 22, has been assigned a new
target launch date of no earlier than April 24.

     The decision for STS-56 to be the next mission flown came
after the main engine team finished analyzing the purge valve
which caused the STS-55 launch scrub.  The team's investigation
concluded that the valve from the number 3 main engine failed to
operate properly because of contamination that had been in the
valve since it was manufactured.  The team also determined that
this condition could exist in other engines.  A series of tests
designed to reveal such a condition have been performed on
Discovery and one suspect valve from one engine is being removed
and replaced.

     "Flying the missions in this order is the most effective
use of all our resources" said Shuttle Director Tom Utsman. "The
early April launch of the ATLAS 2 mission will give scientists
the opportunity to observe changes in the Earth's ozone during
the seasonal transition between spring and summer in the
northern hemisphere.  At the same time, the launch team at
Kennedy will be working to get Columbia back to launch
configuration for launch on April 24.  NASA is very pleased with
the cooperation given by our friends in the German space agency.
They have been involved as all possible options were considered.
Their willingness to let the STS-56 mission have an early April
launch will give the ATLAS folks the chance to collect some very
important data on the Earth's ozone."

     As part of the effort to have Columbia ready at the
earliest possible date, all three main engines are being removed
and will be replaced with ones originally scheduled for use
during the STS-57 mission with Space Shuttle Endeavour .

     The STS-57 mission, which will involve the first flight of
the SPACEHAB commercial payload and the retrieval of the
European Space Agency's EURECA satellite, is now scheduled to
fly in late May. The rest of the Space Shuttle missions planned
for 1993 will stay in their planned order and schedule.

-end-

3/22/93

     While igniting Columbia's three main engines which began at
T-6.6 seconds, the onboard computers initiated a main engine abort
sequence.  Shutdown was completed at approximately T-3 seconds at
9:51 a.m. EST.

     The reason for the abort appears to be that  main engine #3
did not fully ignite due to a liquid oxygen preburner check valve
which apparently experienced an internal leak, causing the purge
system to be pressurized above the maximum 50 pounds per square
inch allowed.  Ambient pressure would have allowed full engine
ignition to occur. The onboard computers sensed the higher than
allowed pressure in the line and terminated the main engine
ignition sequence.

The amount of time estimated to pick up the Columbia's STS-55 countdown again
is about a minimum of three weeks.  No definite schedule has been developed.
Schedule options are under consideration this week.






STS-55 LAUNCH DATE SET FOR MARCH 21,1993



Ed Campion                                     March 12, 1993
Headquarters, Washington, D.C.


George Diller
Kennedy Space Center, Fla.


Release No. 22-93

NOTE TO EDITORS:  NEW LAUNCH DATE FOR STS-55 MISSION

     NASA Managers today set March 21, 1993 as the launch date for Shuttle
Mission STS-55 which will see Space Shuttle Columbia and her 7 member crew fly
a mission dedicated to the German Space Agency. The major payload for STS-55,
the pressurized spacelab module - designated as Spacelab-D2 for this flight -
will allow the astronauts to conduct a wide range of experiments in the
microgravity environment of space.

     The launch window on March 21 opens at 9:52 a.m.  EST. Following launch,
Columbia's crew will be divided into two teams each working a 12-hour shift, so
that science operations can be carried out around the clock.  The Spacelab-D2
mission duration is planned for 9 days and will conclude with a landing at
Kennedy Space Center's Shuttle Landing Facility.

     Columbia's launch date will have an influence on the next mission to be
flown.  Space shuttle Discovery, flying the ATLAS 2 payload on Shuttle Mission
STS-56, now targeted for launch sometime around April 7th.  The actual launch
date for STS-56 will be set at a Flight Readiness Review meeting which will be
held approximately two weeks before launch.

     "The Shuttle team has done a great job in addressing and closing issues
such as the hydraulic flex hose problem and putting together a new plan for
processing activities" said Shuttle Director Tom Utsman. "Also the cooperation
we've received from the United States Navy, the United States Air Force and
Hughes Space and Communication Company made the March 21st launch of Columbia
possible."






STS-55 STATUS    3/08/93
DAILY NEWS/TV SKED

Daily News
Monday, March 8, 1993


Managers and engineers will continue to asses the launch schedule impact
attributable to inspections of the hydraulic flex hoses and clean-up and
inspection of the aft engine compartment and number two main engine.  An
assessment of a new schedule will be made available early this week.





2/26/93: MARCH 14 SET AS LAUNCH DATE FOR STS-55 MISSION

Ed Campion
Headquarters, Washington, D.C.                Feb. 26, 1993

George Diller
Kennedy Space Center, Fla.

KSC Release No. 16 - 93


     NASA managers today set March 14, 1993 as the launch date
for Shuttle Mission STS-55 which will see Space Shuttle Columbia
and her seven-member crew fly a mission dedicated to the German
Space Agency.

     The major payload for STS-55, the pressurized spacelab
module - designated as Spacelab-D2 for this flight - will allow
the astronauts to conduct a wide range of experiments in the
microgravity environment of space.  Some 90 experiments are
planned during the mission.

     The launch announcement follows the removal, inspection and
replacement of the high pressure oxidizer turbopumps on
Columbia's three main engines.  The pump changeout came after a
search of processing paperwork could not conclusively determine
that the pumps were equipped with a newer version of turbine tip
seal retainers.  The seals minimize the flow of gas around the
tips of the turbine blades to enhance pump performance and the
retainers hold the seals in place.

     The launch window on March 14 extends from 10 a.m. until
12:30 p.m. EST.  Following launch, Columbia's crew will be
divided into two teams, each working a 12-hour shift, so that
science operations can be carried out around the clock.  The
Spacelab-D2 mission duration is planned for 9 days and will con-
clude with a landing at Kennedy Space Center's Shuttle Landing
Facility.  This date was chosen primarily because it was the
first open date on the Eastern Range during this time frame.
                             # # # # #


STS-55 REVIEW COMPLETED, LAUNCH DATE TO BE SET LATER

Ed Campion
Headquarters, Washington, D.C.                  February 11, 1993


George Diller
Kennedy Space Center, Fla.


NOTE TO EDITORS:  N93-7

        NASA managers today completed their review of the flight readiness of
Shuttle Mission STS-55, a mission dedicated primarily to the German Space
Agency for research in life and microgravity sciences.

        Because of a decision reached yesterday to remove and replace
Columbia's high pressure oxidizer pumps, a launch date for the mission was not
set.  Managers are still assessing the time it will take to perform the work
and resume launch preparations.  Tom Utsman, Director of the Space Shuttle
Program, said a launch date for STS-55 would be set the last week in February.

        The pumps being replaced feed super cold oxygen to the Shuttle's three
main engines.  They are being removed because a search of processing paperwork
could not conclusively determine that the pumps are equipped with a newer
version of turbine tip seal retainers.  The tip seals minimize the flow of gas
around the tips of the turbine blades to enhance pump performance and the
retainers hold the seals in place.

        The major payload for Space Shuttle Columbia and her 7 member crew is
the pressurized Spacelab module - designated Spacelab-D2 - which will allow the
astronauts to conduct a wide range of experiments in the microgravity
environment of space.  Some 90 experiments are planned during the mission.

        This will be the 14th flight of the orbiter Columbia and the 54th Space
Shuttle mission.
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_2_2_43_7.TXT

STS-55 Keplerian Elements/State Vector (Predicted)

STS-55 elements (April 24 launch)

STS-55
1 00055U          93114.67000478  .00120200  00000-0  36300-3 0    69
2 00055  28.4697 267.1108 0003812 314.2100  45.8202 15.90487610    22

Satellite: STS-55
Catalog number: 00055
Epoch time:      93114.67000478   =    (24 APR 93   16:04:48.41 UTC)
Element set:     JSC-006
Inclination:       28.4697 deg
RA of node:       267.1108 deg          Space Shuttle Flight STS-55
Eccentricity:     .0003812             Prelaunch Keplerian Elements
Arg of perigee:   314.2100 deg         Launch:  24 APR 93  14:52 UTC
Mean anomaly:      45.8202 deg
Mean motion:   15.90487610 rev/day              G. L. Carman
Decay rate:     1.2020e-03 rev/day~2     NASA  Johnson Space Center
Epoch rev:               2

G.L.CARMAN


STS-55
FLIGHT DAY 1 STATE VECTOR (PREDICTED)
ON ORBIT OPERATIONS
(Posted 04/22/93 by Roger Simpson)

The following vector for the flight of STS-55 is provided by NASA Johnson
Space Center, Flight Design and Dynamics Division for use in ground track
plotting programs.  The vector represents the predictied trajectory of
Columbia during on orbit operations, after the OMS-2 maneuver.  The vector
assumes an on time launch.  Questions regarding these postings may be
addressed to Roger Simpson, Mail Code DM4, L. B. J. Space Center, Houston,
Texas 77058.


Lift off Time : 1993/114/14:52:00.000
Lift off Date : 04/24/93

Vector Time (GMT) : 114/15:35:00.000
Vector Time (MET) : 000/00:43:00.000
Orbit Count : 1
Weight : 244237.0 LBS
Drag Coefficient : 2.00
Drag Area : 2750.0 SQ FT

     M50 Elements                           Keplerian Elements
-----------------------                 --------------------------
X    =   -16316639.1  FT                A          = 3608.0505 NM
Y    =    11463512.2  FT                E          = 0.000522
Z    =    -9082446.2  FT                I  (M50)   =  28.21573 DEG
Xdot = -11959.988763  FT/S              Wp (M50)   = 258.26527 DEG
Ydot = -21597.692493  FT/S              RAAN (M50) = 266.81945 DEG
Zdot =  -5764.287807  FT/S            / N (True)   = 342.98133 DEG
                           Anomalies  \ M (Mean)   = 342.99882 DEG

                                        Ha         = 162.4037  NM
                                        Hp         = 160.0044  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
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_7_2_18_3.TXT

4/23/93:  HUBBLE TELESCOPE SERVICING MISSION SCHEDULED FOR ELEVEN DAYS

Ed Campion
Headquarters, Washington, D.C.
  Ap

Kyle Herring
Johnson Space Center, Houston

RELEASE:  93-76

        The December flight of Endeavour on Space Shuttle mission STS-61 to
service the Hubble Space Telescope (HST) has been scheduled as an 11 day
mission designed to accommodate a record five spacewalks with the apability
for an additional two, if needed.

        The decision to schedule five extravehicular activities, or EVAs, was
reached following extensive evaluations of underwater training, maneuver times
required using the Shuttle's robot arm based on software simulations and actual
EVA tasks on previous missions.

        "Basically what we've done by going to five EVAs rather than three is
to repackage our margin so that we have the capability to respond to the
dynamics, or unknowns, of spacewalks," Mission Director Randy Brinkley said.
"It improves the probabilities for mission success while providing added
flexibility and adaptability for reacting to real-time situations."

        In laying out the specific tasks to be completed on each of the
spacewalks, officials have determined that changing out the gyros, solar arrays
and the Wide Field/Planetary Camera (WF/PC) and installing the Corrective
Optics Space Telescope Axial Replacement (COSTAR) are priority objectives
during the mission.

        "When we looked at accomplishing all of the tasks, highest through
lowest priority, and recognizing that the major tasks -- gyros, solar arrays,
WF/PC and COSTAR -- would consume most of the time set aside for each
spacewalk, five EVAs were deemed appropriate," said Milt Heflin, Lead Flight
Director for the mission.

        While the five spacewalks will be unprecedented, the use of two
alternating spacewalk teams will alleviate placing more stress on the crew than
previous missions requiring two, three or four EVAs.

        "We have paid close attention to lessons learned during previous
spacewalks and factored these into our timeline estimates for five EVAs,"
Heflin said. "In planning for all Space Shuttle missions, it is necessary to
formulate a work schedule that represents as realistic a timeline as possible
to accomplish the mission objectives."

        Planning currently calls for at least five water tank training sessions
that include support from the Mission Control Center, called joint integrated
simulations, lasting between 10 and 36 hours.  In addition, many stand alone
underwater training "runs" will practice individual tasks in each spacewalk.

        Various refinements to the specific tasks on each spacewalk will be
made based on actual training experience during the months prior to the
mission.  Also, lessons learned from other spacewalks leading up to the flight
will be valuable in assisting the STS-61 crew in its training techniques.

        Endeavour's June flight and Discovery's July mission both will include
spacewalks to evaluate some of the unique tools to be used on the HST mission.
The evaluations will help in better understanding the differences between the
actual weightlessness of space and the ground training in the water tanks at
the Johnson Space Center, Houston, and the Marshall Space Flight Center,
Huntsville, Ala.

        Also, the inflight spacewalking experiences will assist in gaining
further insight into the time required for the various tasks and expand the
experience levels among the astronaut corps, the flight controllers and
trainers.

        Designed to be serviced by a Space Shuttle crew, Hubble was built with
grapple fixtures and handholds to assist in the capture and repair procedures.

        The telescope was launched aboard Discovery in April 1990.  At that
time the NASA mixed fleet manifest showed the first revisit mission to HST in
1993 to change out science instruments and make any repairs that may have
become necessary.
- end -
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_8_3_4_15.TXT

MAGELLAN STATUS 4/23/93

Magellan Significant Events for Week Ending 4/23/93:


* 1.  The Magellan spacecraft continues to operate normally, gathering gravity
data to plot the density variations of Venus in the mid-latitudes.  The solar
panel offpoint was returned to zero degrees and spacecraft temperatures dropped
2-3 degrees C.

* 2.  An end-to-end test of the Delayed Aerobraking Data readout process was
conducted this week in preparation for the Transition Experiment. There was
some difficulty locking up to the data frames, and engineers are presently
checking whether the problem was in equipment at the tracking station.

        3.  Magellan has completed 7277 orbits of Venus and is now 32 days from
the end of Cycle 4 and the start of the Transition Experiment.

* 4.  Magellan scientists were participating in the Brown-Vernadsky
Microsymposium at Brown University in Providence, RI, this week.  This joint
meeting of U.S. and Russian Venus researchers has been continuing for many
years.


Magellan Significant Events for Next Week


* 1.  A three-day simulation of Transition Experiment aerobraking activities is
planned for next week, including Orbit Trim Maneuvers and Starcal Orbits.
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_10.TXT

ULYSSES STATUS 3/30/93

ULYSSES: The spacecraft is in a highly inclined solar orbit, now
more than 20 degrees south of the ecliptic plane, in transit from
its Jupiter gravity assist in February 1992 toward its solar
polar passages in 1994 and 1995.  Ulysses is participating in the
gravity wave experiment with Galileo.  Spacecraft condition and
performance are excellent, and cruise science data-gathering
continues.  The Ulysses spacecraft was built by the European
Space Agency and launched October 6, 1990 aboard Space Shuttle
Discovery, with IUS and PAM-S stages.
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_2.TXT

 NOTE: This file is too large {93965 bytes} for inclusion in this collection.
    The first line of the file:

1990 ULYSSES STATUS REPORTS

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

=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_3.TXT

 NOTE: This file is too large {203220 bytes} for inclusion in this collection.
    The first line of the file:

1991 ULYSSES STATUS REPORTS

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

=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_4.TXT

 NOTE: This file is too large {174753 bytes} for inclusion in this collection.
    The first line of the file:

1992 ULYSSES STATUS REPORTS

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

=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_5.TXT

ULYSSES MISSION STATUS
January 5, 1993

     All spacecraft and science operations are performing well.  Ground
controllers are carrying out routine data-gathering activities and experiment
reconfigurations as required.  The 34- meter ground antennas are being used for
ranging when the spacecraft is sending data at a low bit rate.  Seventy-meter-
antenna ranging passes are also performed periodically.

     Earth-pointing maneuvers were carried out on Dec. 27 and 30, 1992, and on
Jan. 3, 1993.  The next maneuver is scheduled for Jan. 7, 1993.

     Today Ulysses is about 688 million kilometers (428 million miles) from
Earth, traveling at a heliocentric velocity of about 32,000 kilometers per hour
(21,000 miles per hour).  Ulysses is about 15.5 degrees south of the ecliptic
plane in which the planets orbit, slowly looping its way back toward the sun.
     Source:NASA Spacelink    Modem:205-895-0028  Internet:192.149.89.61
=--=--=-END-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_6.TXT

ULYSSES  STATUS REPORT          January 27,1993
Jet Propulsion Laboratory


The spacecraft is in a highly inclined solar orbit, now almost 17 degrees south
of the ecliptic plane, in transit from its Jupiter gravity assist in February
1992 toward its solar polar passages in 1994 and 1995.  Its condition and
performance are excellent, and it continues to observe the interplanetary
medium.  The Ulysses spacecraft was built by the European Space Agency and
launched October 6, 1990 aboard Space Shuttle Discovery, with IUS and PAM-S
stages.

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

=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_7.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-=--=--=

=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_8.TXT

ULYSSES MISSION OPERATIONS REPORT  2/23/93 Thru 3/01/93

PERIOD:   23rd February to 1st March 1993

1. MISSION OPERATIONS

     Experiment reconfigurations have been carried out as required.

     On 24th February a HED (Magnetic Field instrument) calibration was carried
     out.

     On 1st March a KEP (Energetic Particles instrument) in-flight calibration
     was carried out.

     Routine Earth pointing manoeuvres were performed on 23rd, 25th, and 27th
     February and 1st March.

     An average of 98.45 % data recovery was achieved during the reporting
     period.

     The percentage of data acquired as a function of bit rate is as follows:

     1024 bps 45.13 %
      512 bps 53.37 %



2.  SPACECRAFT STATUS

     POWER

     Nominal.

     Estimated S/C power consumption 256 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 4.82 on
     Angle (deg.)   23rd February to 4.71 on 1st March.

     Sun-Probe-Earth  The angle reduced from 4.81 on
     Angle (deg.)     23rd February to 4.62 on 1st March.

     Spin Rate               4.979 rpm.



4.   ORBITAL DATA

     Data taken at 13:00 PDT on 1st March.
     Distance from Earth                600,126,827 km.
     Velocity relative to the Earth         108,782 km/hr.
     Velocity relative to the Sun            35,509 km/hr.
     Ecliptic latitude                         19.1 deg/south




5.  PLANNED OPERATIONS

     Routine data gathering operations will continue together with experiment
     reconfigurations as required.

     On 2nd March a HET calibration will be carried out.

     On 3rd March HET will be reset.

     On 8th March a KEP in-flight calibration will be carried out.

     Earth pointing manoeuvres will be carried out on 3rd, 5th, 7th and 9th
     March.

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

=--=--=START=--=--= NASA Spacelink File Name:6_8_5_3_9.TXT

ULYSSES STATUS REPORTS 132 & 133

SUBJECT:  ULYSSES MISSION OPERATIONS REPORT No. 132
PERIOD:   2nd March to 8th March 1993

1.   MISSION OPERATIONS

     Experiment  reconfigurations  have  been  carried   out   as
     required.

     On 2nd March a HET calibration was carried out.

     On 3rd March HET was reset.

     On 8th March a KEP (Energetic Particles instrument) in-flight
     calibration was carried out.

     Routine  Earth  pointing manoeuvres were performed  on  3rd,
     5th, and 7th March.

     An  average of 93.2 % data recovery was achieved during  the
     reporting period.

     The percentage of data acquired as a function of bit rate is
     as follows:

     1024 bps 45.86 %
      512 bps 46.92 %

     On 4th March a complete pass at Goldstone was lost due to  a
     maser failure.  An extra pass was made available at Canberra
     and  a rapid replanning of operations took place to minimise
     the  amount of data loss.  Operations for the following  day
     were also replanned.

     On  5th  March  the  Goldstone maser was brought  back  into
     operation.  The total data loss following this failure was 4
     1/2  hours.  More than 27 hours of data would have been lost
     if  the  replanning had not occurred.  The support from  the
     Deep  Space  Network in providing extra  coverage  was  much
     appreciated.

2.   SPACECRAFT STATUS

     POWER

     Nominal.

     Estimated S/C power consumption 256 watts.

     AOCS

     Nominal.

     TTC

     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 -126 dBm.

     DATA HANDLING

     Nominal.

     THERMAL

     Nominal.

3.   FLIGHT DYNAMICS

     Solar Aspect   The angle increased from 4.64 on
     Angle (deg.)   2nd March to 4.91 on 8th March.

     Sun-Probe-Earth  The angle increased from 4.63 on
     Angle (deg.)     2nd March to 4.90 on 8th March.

     Spin Rate               4.979 rpm.

4.   ORBITAL DATA

     Data taken at 13:00 PDT on 8th March.
     Distance from Earth                598,709,567 km.
     Velocity relative to the Earth         105,627 km/hr.
     Velocity relative to the Sun            35,740 km/hr.
     Ecliptic latitude                         19.5 deg/south

5.   PLANNED OPERATIONS


     Routine  data  gathering operations will  continue  together
     with experiment reconfigurations as required.

     On 10th March a HED (Magnetic Field instrument) calibration will
     be carried out.

     On  15th  March a KEP in-flight calibration will be  carried
     out.

     Earth  pointing manoeuvres will be carried out on 9th, 11th,
     13th, and 15th March.

     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  the  failure  at  Goldstone
     referred to above.




SUBJECT:  ULYSSES MISSION OPERATIONS REPORT No. 133

PERIOD:   9th March to 15th March 1993

1.   MISSION OPERATIONS

     Experiment reconfigurations have been carried out as
     required.

     On 10th March a HED (Magnetic Field instrument) calibration
     was carried out.

     On 15th March a KEP (Energetic Particles instrument) in-flight
     calibration was carried out.

     Routine Earth pointing manoeuvres were performed on 9th,
     11th, 13th and 15th March.

     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 53.60 %
      512 bps 44.39 %

2.   SPACECRAFT STATUS

     POWER

     Nominal.

     Estimated S/C power consumption 256 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 -136 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,
     andspacecraft antenna off-pointing).

     Received uplink level -121 dBm.

     DATA HANDLING

     Nominal.

     THERMAL

     Nominal.

3.   FLIGHT DYNAMICS

     Solar Aspect   The angle increased from 4.87 on
     Angle (deg.)   9th March to 5.51 on 15th March.

     Sun-Probe-Earth  The angle increased from 4.98 on
     Angle (deg.)     9th March to 5.62 on 15th March.

     Spin Rate               4.979 rpm.

4.   ORBITAL DATA

     Data taken at 13:00 PDT on 15th March.
     Distance from Earth                599,711,379 km.
     Velocity relative to the Earth         102,385 km/hr.
     Velocity relative to the Sun            35,975 km/hr.
     Ecliptic latitude                         19.9 deg/south

5.   PLANNED OPERATIONS

     Routine data gathering operations will continue together
     with experiment reconfigurations as required.

     Earth pointing manoeuvres will be carried out on 17th, 19th,
     21st, and 23rd March.

     On 20th March a HUS (Solar X-ray instrument) datation test will
     commence.

     On 21st March the HUS datation test will terminate.

     On 22nd March a KEP in-flight calibration will be carried
     out.

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

=--=END OF COLLECTION---COLLECTED 20 FILES---COMPLETED 21:10:26=--=