







NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

SPACE SHUTTLE MISSION STS-76     PRESS KIT
March 1996

Third Space Shuttle - Mir Docking Mission


For Information on the Space Shuttle

Ed Campion  Policy/Management202/358-1778
  Headquarters, Washington, DC

Rob Navias  Mission Operations, Astronauts713/483-5111
  Johnson Space Center, Houston, TX

Bruce Buckingham Launch Processing, KSC Landing  407/867-2468
  Kennedy Space Center, FL

June Malone  External Tank/Shuttle Propulsion   205/544-0034



  Marshall Space Flight Center,Huntsville, AL

Cam Martin   DFRC Landing Information          805/258-3448
  Dryden Flight Research Center, Edwards, CA

For Information on STS-76 Experiments & Activities


Mike Braukus               Mir Science202/358-1979
  Headquarters, Washington, DC

Debbie Rahn   International Cooperation202/358-1639
  Headquarters, Washington, DC

Ray Castillo       MEEP            202/358-4555
  Headquarters, Washington, DC

Beth Schmid     KidSat/SAREX202/358-1760
  Headquarters  Washington, DC




Tammy Jones   TRIS                              301/286-5566
  Goddard Space Flight Center, Greenbelt, MD

CONTENTS


GENERAL BACKGROUND

1.0 General News Release
2.0 Media Services Information
  2.1 NASA Television Transmission
  2.2 Status Reports
  2.3 Briefings
  2.4 Internet Information
  2.5 Access by CompuServe
3.0 Quick Look
4.0 Shuttle Abort Modes'
5.0 Mission Summary Timeline
6.0 Orbital Events Summary
7.0 Payload and Vehicle Weights

8.0 Crew Responsibilities

STS-76 PAYLOADS & ACTIVITIES

9.0 Developmental Test Objectives/Detailed Supplementary
Objectives/Risk Mitigation Experiments
10.0 MIR Rendezvous/Docking
11.0 Extravehicular Activity
  11.1 Mir Environmental Experiment Payload
  11.2 Common US/Russian EVA Tools
  11.3 Docking Module Television Camera Removal
  11.4 Simplified Aid For EVA Rescue
12.0 MIR science

Cargo Bay Experiments

13.0 SPACEHAB Module
  13.1 Russian Logistics
  13.2 EVA Tools
  13.3 Risk Mitigation Experiments

  13.4 American Logistic
  13.5 Science And Technology Experiments
14.0 Mir Environmental Effects Payload (MEEP)
15.0 KidSat
16.0 Shuttle Amateur Radio Experiment (SAREX)
17.0 Trapped Ions in Space (TRIS)
18.0 Crew Biographies

----------



.0 General News Release

RELEASE:  96-46

CONTINUATION OF U.S./RUSSIA SPACE COOPERATION HIGHLIGHTS
THIRD SHUTTLE MISSION OF 1996

     The first spacewalk by U.S. astronauts while the shuttle

is attached to the Russian Space Station Mir and the first
American woman to serve as a Mir station researcher will
highlight NASA's third shuttle mission of 1996.

     The flight, designated mission STS-76, is the third of
nine planned Space Shuttle-Mir link ups between 1995 and
1998, including rendezvous, docking and crew transfers, which
will pave the way toward assembly of the International Space
Station beginning in November 1997.

The STS-76 crew is commanded by Kevin P. Chilton, making
his third Shuttle flight.  The pilot for the mission, Richard
A. Searfoss, is making his second flight.  There are four
mission specialists assigned to the flight.  Ronald M. Sega,
serving as the Payload Commander and Mission Specialist-1 is
making his second flight.  Mission Specialist-2 is Richard
Clifford who is making his third flight.  Linda Godwin,
serving as Mission Specialist-3, is also making her third
flight.  Mission Specialist-4, Shannon Lucid, is flying in
space for the fifth time.  Lucid will remain aboard the Mir

station after Atlantis undocks, becoming the first American
woman to serve as a Mir crew member.  She will remain aboard
the orbiting station until Atlantis again docks to Mir in
early August.

     Launch of Atlantis is currently targeted for no earlier
than March 21, 1996 at approximately 3:35 a.m. EST from
Kennedy Space Center's Launch Complex 39-B.  The actual
launch time may vary a few minutes based on calculations of
the Mir's precise location in space at the time of launch,
due to Shuttle rendezvous phasing requirements.  The
available launch period or "window" to launch Atlantis, is
approximately 6-10 minutes each day.

     The STS-76 mission is scheduled to last approximately 9
days, 4 hours, 29 minutes.  Docking with Mir is set for the
third day of the mission.   An on time launch and nominal
mission duration would result in a landing on March 30 at
8:04 a.m. EST.


     STS-76 rendezvous and docking activities with the Mir
actually begin with the precisely timed launch of Atlantis,
setting it on a course to meet the orbiting station.  Over
the next two days, periodic firings of Atlantis' small
thruster engines will gradually bring the Shuttle closer to
Mir.  Docking with the Mir station is planned to take place
43 hours into the flight.

     On the sixth day of the mission, Godwin and Clifford are
scheduled to perform a six-hour spacewalk while Atlantis is
docked to the Mir.  They will attach four experiments
individually onto handrails located on the Mir Docking
Modules.  The experiments, collectively referred to as the
Mir Environmental Effects Payload (MEEP), are designed to
help characterize the space environment at a 51.6 degree
inclination, the same inclination at which the International
Space Station will be built.  The MEEP experiments will be
retrieved during a spacewalk 18 months later.  Godwin and
Clifford also will work with common U.S./Russian EVA hardware
such as safety tethers and foot restraints and will retrieve

a video camera mounted on Mir.  Their EVA also represents one
in a series aimed at testing equipment and procedures which
may be implemented during assembly and maintenance of the
International Space Station.

     During the five days of docked operations, many of th
planned joint activities will center around the middeck and
SPACEHAB module.  Equipment being flown in the module
includes items to be used during the EVA, supplies for the
Russians such as food, water, batteries, navigation
equipment, clothing and U.S. supplies to support Dr. Lucid's
stay aboard Mir.  The SPACEHAB module also will contain an
ESA-sponsored science experiment called Biorack, which is a
variety of experiments that addresses investigations in both
life and microgravity sciences.

     Two payloads will provide students the opportunity to
participate with the mission.  A new payload known as KidSat
will make its first flight and will provide students in
grades K-12 access to real-time images of the Earth from

their own observing instruments in space.  The Shuttle
Amateur Radio Experiment (SAREX), which has flown on several
flights, allows students to talk with STS-76 crewmembers via
ham radio.  During the communication sessions, students can
talk to the crew  about mission activities and learn about
how individuals live and work in space.

     The STS-76 mission will be the 16th flight of Atlantis
and the 76th for the Space Shuttle system.

 -- end of general release



2.0 Media Services Information

  2.1 NASA Television Transmission

     NASA television is available through the Spacenet-2
satellite system.  Spacenet-2 is located on Transponder 5, at

69 degrees West longitude, frequency 3880.0 MHz, audio 6.8
MHz.

   The schedule for television transmissions from the Orbiter
and for mission briefings will be available during the
mission at Kennedy Space Center, FL; Marshall Space Flight
Center, Huntsville, AL; Dryden Flight Research Center,
Edwards, CA; Johnson Space Center, Houston, TX; and NASA
Headquarters, Washington, DC.  The television schedule will
be updated to reflect changes dictated by mission operations.

    Television schedules also may be obtained by calling
COMSTOR at 713/483-5817.  COMSTOR is a computer data base
service requiring the use of a telephone modem.  A voice
update of the television schedule is provided daily at noon
Eastern time.

2.2  Status Reports

     Status reports on countdown and mission progress, on-

orbit activities and landing operations will be produced by
the appropriate NASA newscenter.

  2.3 Briefings

     A mission press briefing schedule will be issued prior
to launch.  During the mission, status briefings by a flight
director or mission operations representative and when
appropriate, representatives from the payload team, will
occur at least once each day.  The updated NASA television
schedule will indicate when mission briefings are planned.

  2.4 Internet Information

     The NASA Headquarters Public Affairs Internet Home Page
provides access to the STS-76 mission press kit and status
reports.  The address for the Headquarters Public Affairs
Home Page is: http://www.nasa.gov/hqpao/hqpao_home.html

Informational materials, such as status reports and TV

schedules, also are available from an anonymous FTP (File
Transfer Protocol) server at ftp.hq.nasa.gov/pub/pao.  Users
should log on with the user name "anonymous" (no quotes),
then enter their E-mail address as the password. Within the
/pub/pao directory there will be a "readme.txt" file
explaining the directory structure.


     Pre-launch status reports from KSC are found under
ftp.hq.nasa.gov/pub/pao/statrpt/ksc, and mission status
reports can be found under
ftp.hq.nasa.gov/pub/pao/statrpt/jsc.  Daily TV schedules can
be found under ftp.hq.nasa.gov/pub/pao/statrpt/jsc/tvsked.

  2.5 Access by CompuServe

     Users with CompuServe accounts can access NASA pres
releases by typing "GO NASA" (no quotes) and making a
selection from the categories offered.




3.0 Quick Look

Launch Date/Site:             March 21, 1996/KSC Pad 39-B
Launch Time:                  3:35 AM EST
Launch Window:Between 6-10 minutes
Orbiter:Atlantis (OV-105), 16th flight
Orbit Altitude/Inclination    160 nautical miles, 213 n.m.
 for docking/51.6 degrees
Mission Duration:             9 days, 4 hours, 29 minutes
Landing Date:                 March 30, 1996
Landing Time:                 8:04 AM EST
Primary Landing Site:Kennedy Space Center, FL
Abort Landing Sites:          Return to Launch Site - KSC
Transoceanic Abort Sites -
 Zaragoza, Spain
 Moron, Spain
 Ben Guerir, Morocco
Abort-Once Around - KSC


Crew:Kevin Chilton, Commander (CDR)
 Rick Searfoss, Pilot (PLT)
Ron Sega, Payload Cmdr.,
 Mission Specialist 1 (MS 1)
 Rich Clifford,
 Mission Specialist 2 (MS 2)
 Linda Godwin,
 Mission Specialist 3 (MS 3)
Shannon Lucid,
 Mission Specialist 4 (MS 4,
 Ascent-Docking)
Mir 21 Crew: Yuri Onufrienko, Commander
 Yuri Usachev, Flight Engineer
 (Lucid joins the Mir 21 crew
  after docking for
approximately 142 days)

EVA Crew :Linda Godwin (EV1),
Rich Clifford (EV2)


Cargo Bay Payloads:SPACEHAB-Single Module
Orbiter Docking System
MEEP

In-Cabin Payloads:KidSat
SAREX



4.0 Shuttle Abort Modes

     Space Shuttle launch abort philosophy aims toward safe
and intact recovery of the flight crew, Orbiter and its
payload.  Abort modes for STS-76 include:

 -- Abort-To-Orbit (ATO) -- Partial loss of main engine
thrust late enough to permit reaching a minimal 105-nautical
mile orbit with the orbital maneuvering system engines.


 -- Abort-Once-Around (AOA) -- Earlier main engine shutdown
with the capability to allow one orbit of the Earth before
landing at the Kennedy Space Center, FL.

 -- Transoceanic Abort Landing (TAL) -- Loss of one or more
main engines midway through powered flight would force a
landing at either Ben Guerir, Morocco; or Moron, Spain.

 -- Return-To-Launch-Site (RTLS) -- Early shutdown of one or
more engines, and without enough energy to reach a TAL site,
would result in a pitch around and thrust back toward Kennedy
until within gliding distance of the Shuttle Landing
Facility.



5.0 Mission Summary Timeline

Flight Day 1:
Launch/Ascent

OMS-2 Burn
SPACEHAB Activation
Mir Rendezvous Burns

Flight Day 2:
SPACEHAB Operations and Biorack
Rendezvous Tool Checkout
EVA Tool Transfer
KidSat Setup
EMU Checkout
SAFER Checkout
Rendezvous Burns

Flight Day 3:
Rendezvous
Docking
Hatch Opening/Welcoming Ceremony/Gift Exchange
Crew Transfer
Logistics Transfers


Flight Day 4:
Operations and Biorack
Photography Experiments
Logistics and Water Transfers

Flight Day 5:
SPACEHAB Operations and Biorack
Logistics Transfers
Joint Crew News Conference
EVA Middeck Preparations
Hatch Closure
Cabin Depress


EVA Preparations
EVA (6 hours)
Cabin Repress
Wireless Network Experiment
Hatch Opening

7
Logistics Transfers
SPACEHAB Operations and Biorack
Farewell Ceremony
Final Hatch Closure

Flight Day 8:
Undocking and Mir Flyaround
Separation Maneuver
KidSat Setup
Transfer Item Stowage
EVA Tool Stowage


Cabin Stowage
Flight Control System Checkout
Reaction Control System Hot-Fire
SPACEHAB Operations and Partial Deactivation

Flight Day 10:

Final SPACEHAB Deactivation
Entry Review
Deorbit Prep
Deorbit Burn
Entry
KSC Landing



6.0 Orbital Events Summary
(Based on a Mar. 21, 1996 Launch)

EVENTMETTIME OF DAY (EST)

Launch       0/00:003:35 AM, Mar. 21
OMS-2               0/00:43   4:18 AM, Mar. 21

Exact times for major events on STS-76 and other Phase 1
Shuttle-Mir docking missions will not be determined until
after launch because of the rendezvous requirements needed

for Atlantis to reach the Mir space station.  Docking with
the Mir is predicted to occur about 43 hours after launch.
The spacewalk outside Mir is scheduled to begin at an
approximate Mission Elapsed Time of 4/22:35. Undocking is
predicted to occur at an approximate Mission Elapsed Time of
6/17:34.

Deorbit Burn9/03:297:04 AM, Mar. 30
KSC Landing9/04:298:04 AM, Mar. 30



7.0 Payload and Vehicle Weights

Vehicle/Payload                       Pounds

Orbiter (Atlantis) empty and 3 SSME's152,246
Orbiter Docking System                                 4,016
SPACEHAB Module and Tunnel Adapter                    10,387
Risk Mitigation Experiments (RME's)                      709

KidSat                                                     4
SAREX                                                     28
Shuttle System at SRB Ignition                     4,509,746
Orbiter Weight at Landing                            246,335



8.0 Crew Responsibilities

PayloadsPrimeBackup

SPACEHABSegaGodwin
Biorack                     SegaGodwin
RendezvousChilton, Searfoss   Clifford
Orbiter Docking SystemCliffordGodwin
KidSatGodwinSearfoss
Russian Language            Sega     ----
EVA                   Godwin (EV 1)     Clifford (EV 2)
Intravehicular Crewmember   Sega  ----
Space Vision System         CliffordSearfosse

Dewar TransferCliffordSearfoss
Battery TransferCliffordSearfoss
Gyrodyne Transfer           CliffordSearfoss
Water Transfer              SearfossClifford
Frozen Sample TransferSegaGodwin
SAREXGodwinSearfoss



9.0 Developmental Test Objectives/Detailed Supplementary
Objectives/Risk Mitigation Experiments

DTO 301D:    Ascent Structural Capability Evaluation
DTO 307D:    Entry Structural Capability
DTO 312:     ET TPS Performance
DTO 648:     Electronic Still Photography Test
DTO 671:     EVA Hardware for Future Scheduled EVA Missions
DTO 700-5:   Trajectory Control Sensor
DTO 700-10:  Orbiter Space Vision System Video Taping
DTO 700-13:  Signal Attenuation Effects of ET During Ascent

DTO 805:     Crosswind Landing Performance
DTO 1118:    Photographic and Video Survey
               of Mir Space Station
DTO 1210:    EVA Operations Procedures
DSO 331:     LES and Sustained Weightlessness
     on Egress Locomotion
DSO 483:     Back Pain Pattern in Microgravity
DSO 487:     Immunological Assessment of Crewmembers
DSO 489:     EVA Dosimetry Evaluation
DSO 901:     Documentary Television
DSO 902:     Documentary Motion Picture Photography
DSO 903:     Documentary Still Photography
RME 1301:    Mated Shuttle and Mir Structural Dynamics Test
RME 1302:    Mir Electric Fields Characterization
RME 1304:    Mir/Environmental Effects Payload
RME 1306:    Mir Wireless Network
RME 1310:    Shuttle/Mir Alignment Stability Experiment
RME 1315: pped Ions in Space Experiment




10.0 Mir Rendezvous and Docking

     STS-76's rendezvous and docking with the Russian Space
Station Mir begins with the precisely timed launch of
Atlantis on a course for the station.  Over the next two
flight days, periodic small engine firings will gradually
bring Atlantis to a point eight nautical miles behind Mir on
docking day, the starting point for a final approach to the
station.

Mir Rendezvous -- Flight Day 3

     About two hours before the scheduled docking time on
Flight Day Three of the mission, Atlantis will reach a point
about eight nautical miles behind the Mir space station and
fire a Terminal Phase Initiation (TI) burn, beginning the
final phase of the rendezvous.  Atlantis will close the final
eight nautical miles to Mir during the next orbit.  As
Atlantis closes in, the Shuttle's rendezvous radar system

will begin tracking Mir and providing range and closing rate
information to Atlantis.  Atlantis' crew also will begin air-
to-air communications with the Mir crew.

     As Atlantis closes in on the Mir, the Shuttle will have
the opportunity for four small successive engine firings to
fine-tune its approach using its onboard navigation
information.  Identical to the two prior Mir dockings,
Atlantis will aim for a point directly below Mir, along
Earth radius vector (R-Bar), an imaginary line drawn between
Mir's center of gravity and the center of Earth.  Approaching
along the R-Bar, from directly underneath the Mir, allows
natural forces to brake Atlantis' approach more so than would
occur along a standard Shuttle approach from directly in
front of Mir.  During this approach, the crew will also use a
handheld laser ranging device to supplement distance and
closing rate measurments made by Shuttle navigational
equipment.

     The manual phase of the rendezvous will begin just as

Atlantis reaches a point about a half-mile below Mir.
Commander Kevin Chilton will fly the Shuttle using the aft
flight deck controls as Atlantis begins moving up toward Mir.
During the approach up the R-Bar, Chilton will perform a 180
degree yaw rotation to align the Shuttle with the Mir
station.  Because of the approach along the R-Bar, from
underneath Mir, Chilton will have to perform very few braking
firings.  However, if  such firings are required, the
Shuttle's jets will be used in a mode called "Low-Z", a
technique that uses slightly offset jets on Atlantis' nose
and tail to slow the spacecraft rather than firing jets
pointed directly at Mir.  This technique avoids contamination
of the space station and its solar arrays by exhaust from the
Shuttle steering jets.

     Using the centerline camera fixed in the center of the
Atlantis' docking mechanism, Chilton will center Atlantis'
mechanism with the docking module mechanism on Mir,
continually refining this alignment as he approaches within
300 feet of the station.


     At a distance of about 30 feet from docking, Chilton
will stationkeep momentarily to adjust the docking mechanism
alignment, if necessary. The crew will use ship-to-ship
communications with Mir to inform the two cosmonauts of the
shuttle's status and to keep them informed of major events,
including confirmation of contact, capture and the conclusion
of damping.  Damping, the halt of any relative motion between
the two spacecraft after docking, is performed by shock
absorber-type springs within the docking device.

     Once Atlantis is ready to undock from Mir, the initial
separation will be performed by springs that will gently push
the shuttle away from the docking module.  Both the Mir and
Atlantis will be in a mode called "free drift" during the
undocking, a mode that has the steering jets of each
spacecraft shut off to avoid any inadvertent firings.

     Once the docking mechanism's springs have pushed
Atlantis away to a distance of about two feet from Mir,

Chilton will turn Atlantis' steering jets back on when the
docking devices will be clear of one another and fire the
shuttle's jets in the Low-Z mode to begin very slowly moving
away from Mir.

     Atlantis will continue away from Mir to a distance of
about 600 feet, where Searfoss will begin a flyaround of the
station. At that distance, Atlantis will circle Mir twice
before firing its jets again to depart the vicinity of the
station.

11.0 Extravehicular Activity

     STS-76 crew members Dr. Linda Godwin (EV1) and Rich
Clifford (EV2) will perform an approximately six-hour
spacewalk on flight day six of the mission to install the Mir
Environmental Effects Payload (MEEP) on the exterior of the
Mir's docking module and to evaluate new spacewalking
equipment. The spacewalk will be the first ever performed
from the docked Space Shuttle and Mir complex.


     The Simplified Aid For EVA Rescue (SAFER), first test-
flown on shuttle mission STS-64 in September 1994, will be
worn by Godwin and Clifford and will be used only for a
contingency.  Spacewalking equipment to be evaluated consists
of several new tether designs with hooks that can be attached
to both space shuttle handrails and to Mir space station
handrails.  Normal space shuttle tether hooks are not large
enough to be connected to the Mir handrails.  A U.S. camera
mounted on the exterior of the Mir docking module, used
during STS-74 to align the module as it was permanently
docked to the Mir, also will be removed by the spacewalkers
and returned to Earth for reuse.

     While Godwin and Clifford are performing the work in the
cargo bay and on the Mir docking module, Mission Specialist
Ron Sega will serve as the Intravehicular (IV) crewmember,
coordinating the tasks from inside Atlantis' crew cabin.
Prior to beginning the spacewalk, the hatches of both
Atlantis and the Mir will be closed at the docking mechanism.

A hatch at the end of the shuttle tunnel adapter also will be
closed, allowing only the airlock and tunnel to be
depressurized.

     All of the shuttle crew members will be in Atlantis'
crew cabin for the duration of the spacewalk, and all Mir
crew members, including Mir-21 crewmember astronaut Shannon
Lucid, will be aboard the Mir.

  11.1 Mir Environmental Experiment Payload

Godwin and Clifford will remove the four MEEP experiment
containers from their stowed positions along the right and
left sides of Atlantis' cargo bay.  Each experiment container
will be attached to handrails on the exterior of the docking
module using special clamps installed by Godwin and Clifford.
After each experiment package is clamped to the appropriate
module handrails, the spacewalkers will unfold the packages
to expose the experiment panels.


  11.2 Common US/Russian EVA Tools

The tools to be evaluated are called Common US/Russian EVA
tools and include safety tethers with larger hooks to allow
attachment to the Mir's exterior handrails and a new foot
restraint also designed to allow attachment to the Mir
fixtures.

  11.3 Docking Module Television Camera Removal

To remove the Docking Module television camera, the
spacewalkers will use cable cutters to sever the cable
connecting the camera and then turn a knob that releases the
camera's mounting.  The camera will be tethered and taken
aboard Atlantis.

  11.4 Simplified Aid For EVA Rescue

The Simplified Aid for EVA Rescue (SAFER) is a small, self-
contained, propulsive backpack device that can provide free-

flying mobility for a spacewalker in an emergency. It is
designed for self-rescue by a spacewalker in the event the
shuttle is docked to the Mir and thus unable to retrieve a
detached, drifting astronaut.

SAFER is attached to the spacesuit's Portable Life Support
System backpack, and is, in essence, a scaled-down, miniature
version of the Manned Maneuvering Unit backpack flown aboard
shuttle missions in 1984. It is designed for emergency use
only, however, without backup systems built in.  SAFER's
propulsion is provided by 24 fixed-position thrusters that
expel nitrogen gas and have a thrust of .8 lbs. each.  Stowed
in the crew cabin for launch and landing, SAFER's nitrogen
supply can be recharged in orbit from the shuttle's nitrogen
system.  SAFER's three-pound supply of nitrogen can provide
only a total 10-foot-per-second change in velocity for the
operator before it is exhausted. Its attitude control system
includes an automatic attitude hold and six degrees of
freedom.  A 28-volt battery pack for SAFER can be replaced in
orbit.




12.0 MIR science

     Earth orbit places humans in a most unusual environment
with reduced gravitational forces, a near-absolute vacuum, a
broad spectrum of radiation, and wide temperature extremes.
Scientific research has always been one of the most important
objectives for both the American and Russian space programs
and the long-term research platform supplied by the Mir
complex allows extensive studies in fundamental physics,
chemistry, human and plant biology, and technology, as well
as investigations directed toward understanding processes
used on Earth.  A carefully planned program of studies
designed to use the capabilities of Mir during the next few
years will be an integral part of the evolutionary process
into understanding the effects of long-duration microgravity
on biological and physical processes.  Scientists have the
opportunity to better understand the space environment, study

and learn to cope with the effects that it has on humans, and
increase their scientific knowledge and technological
developments for implementation on the International Space
Station and here on Earth.

The commercial and technology development program will
evaluate advanced technologies and manufacturing techniques.
Space environmental effects on physical dynamics will also be
studied.  The Mir station will be used as a test bed to study
several major technology disciplines:  structures, materials,
biotechnology, and physical processes.

     Earth sciences research will be performed in ocean
biochemistry, land surface hydrology, meteorology, and
atmospheric physics and chemistry.  Observation and
documentation of transient natural and human-made phenomena
will be accomplished with the use of passive microwave
radiometers, a visible region spectrometer to study the
ocean, and a side-looking radar.


     Life sciences and fundamental biology applications
include investigations that evaluate new technologies for
life support systems which enhance the capabilities for on-
orbit environmental monitoring.  These include characterizing
the biological and chemical aspects of the research
environment of Mir, and expanding the knowledge of space
human factors and extravehicular activity.

     International Space Station Risk Mitigation consists of
technology demonstrations associated with human
factors and maintenance of crew health and safety aboard the
space station.  By fully evaluating the Mir interior and
exterior environments, such as audible noise levels, radio
frequency interference, crew-induced forces to structures,
particle impacts on the station, and docking configuration
stability, information can be gathered for the improved
design of the International Space Station.

     Microgravity research has the general goal of advancing
scientific understanding and providing value on Earth through

research in biotechnology, fluid physics, combustion, and
materials science.  The ambient acceleration and vibration
environment of Mir will be characterized for benefit to both
research and engineering programs.

     Space science research will collect interstellar and
interplanetary particles in space to further our
understanding of the origin and evolution of planetary
systems and life on Earth.

     Most of the Mir 21/NASA 2 research will be conducted on
the Mir.  Some of the shuttle missions will carry SpaceHab
and provide shuttle-based facilities and Middeck lockers for
short duration experiments.

13.0 SPACEHAB Module

     STS-76 will begin a series of Shuttle-Mir missions that
will carry a SPACEHAB module onboard.  Over the course of
these missions, SPACEHAB modules will carry a mix of supplies

and scientific equipment to and from Mir.

     On STS-76, the SPACEHAB module will be in a single
module configuration, similar to previous SPACEHAB missions.
In addition to the Spacelab short tunnel and airlock which
have flown on SPACEHAB single module missions before, there
will be an extended tunnel beyond the airlock and a 19-inch
tunnel extension built by SPACEHAB, Inc. to position the
SPACEHAB module in the optimal point in the Shuttle's cargo
bay.  Because the single module will be positioned further
aft than on previous missions, the module will be able to
carry up to 4,800 pounds of useable payload up to and back
from Mir.

     Equipment that will be carried in the SPACEHAB module on
STS-76 can be categorized in the following five types:

-- Russian Logistics
-- Extravehicular Activity (EVA) Tools
-- ISS Risk Mitigation Experiments (RME)

-- American Logistics
-- Science and Technology Experiments.

  13.1 Russian Logistics
     A double rack will be dedicated to some of the Russian
logistics, including the gyrodyne and the individual
equipment and seat liner (IESL) kit.  The gyrodyne will be
transferred by the crew to and from Mir to replace a used
gyrodyne.  The IESL kit will be transferred by the crew to
Mir to be available for use by Mission Specialist Shannon
Lucid in case of an emergency return to Earth in a Soyuz
capsule.  Three Russian storage batteries which were returned
to Earth from Mir on STS-71 will be mounted on the aft
bulkhead of the SPACEHAB module.  During docked operations,
the crew will remove the batteries and transfer them to Mir.
Numerous Russian logistics items totaling approximately1,900
lbs. will be carried in the SPACEHAB soft stowage system.
Items include food and water containers, clothing and
sleeping articles, personal hygiene equipment, a current
transformer, and a Mir supplemental kit.  These items will be

transferred to Mir by the crew.

  13.2 EVA Tools
     Several soft bags will be used to carry EVA support
equipment.  The EVA tools will support Detailed Test
Objectives (DTOs) as listed.  The equipment will include
Waist Tethers (DTO 672), Push Lock Tether Tools (DTO 671,
672) and a 35mm Camera and Accessories (Tools for 96 Bolts).
Other Detailed Science Objectives (DSOs) also will be
supported by the EVA equipment, including DSOs 486, 489 and
494.

  13.3 ISS Risk Mitigation Experiments
     The Risk Mitigation Experiments hardware will be carried
in soft stowage bags and consist of the following items:  Mir
Electric Field Characterization (MEFC) hardware, and the Mir
Environmental Effects Payload (MEEP) attachment brackets

 -- The MEFC experiment will collect data on the internal and
external radio interference in the 400 MHz to 18 GHz

frequency band.  The hardware consists of a radio frequency
spectrum analyzer and power cable, an orbiter window antenna,
and a payload general support computer.  The experiment
hardware will be removed from the SPACEHAB module.
Experiment operations will be performed on the shuttle's
flight deck then returned to the module for return to Earth.

 -- The MEEP experiment is designed to collect samples of
orbital and micrometeoroid debris and will be attached to Mir
during an EVA by the crew. The MEEP attachment brackets will
be clamped to external handrails on Mir and will remain there
after their installation during the mission.

13.4 American Logistics
     About 15 full water bags supplied through the shuttle's
water system will be transferred to Mir.  New film also will
be swapped for film already shot aboard Mir, and the docking
module light and television camera will be returned to Earth.

  13.5 Science And Technology Experiments


 -- Biorack:  The European Space Agency's Biorack experiment
will share a double rack with the Life Sciences Laboratory
Equipment Refrigerator/Freezer (LSLE) in the SPACEHAB module.
The Biorack is a multi-purpose facility designed to enable
biological investigations on plants, tissues, cells,
bacteria, and insects during spaceflight.  Its main purpose
is to investigate the effects of microgravity and cosmic
radiation, particularly the effects of high-energy (HZE)
particles, on the development of these species.  Eleven
experiments will be conducted during the mission: three from
the U.S., three from France, three from Germany, one from
Switzerland and one from the Netherlands.  Over 21 hours of
crew time will be spent with the Biorack.

     The equipment which comprises the Biorack includes
incubator units, a glovebox, an experiment power switching
unit, an external power data panel, and one soft stowage
locker.  In addition to the rack-mounted hardware, the
Biorack also will use three middeck lockers, each containing

a passive thermal conditioning unit (PTCU).

     The incubator units provide controlled temperature
environments for certain payload element containers during
Biorack operations while on orbit.  The glovebox is a
containment facility to be used for specimen manipulations.
The glovebox provides a means to contain accidental spillage
of any toxic materials and to prevent contamination of
biological samples when the covers of the payload element
containers are removed for operations.  Payload element
containers come in two sizes, one about the size of cigarette
packs, and another about the size of one-pint ice cream
cartons.  The PTCU provides controlled temperature
environments for the payload element containers when active
temperature conditioning cannot be provided.  Biorack will
require the partial use of one LSLE freezer to contain
payload element samples for on-orbit processing and for
descent.

     The LSLE will be operated in the freezer mode at -22

degrees C on orbit and for the descent.

Biorack will be a combination of nine different payload
elements to be performed throughout the mission.  High-energy
atomic number charged particles (HZE) radiation will be
studied to explicitly correlate biological responses with
naturally occurring HZE particles.  Also, the study of
microgravity potential modifications of biological responses
to radiation will be analyzed.

     Studies also will include the effect of microgravity on
bone loss by investigating alterations in select gene
expression patterns, the continuing studies of microgravity
on gravity sensing, and response in Hematopoietic cells.
Studies on PKC, which is an important enzyme in intra-
cellular signaling pathways, will be analyzed under
microgravity conditions.  The signaling pathways appear to be
sensitive to gravity in a number of cell types.

effects of using centrifuges as 1-g references have

demonstrated sedimentation and convection may affect cells on
a macroscopic scale by the formation of oxygen and nutrient
gradients.  A Biorack payload element will study this
phenomena which implies that a 1-g reference centrifuge may
not necessarily be an optimal control for all types of space
experiments.  An analysis on the effects of the transfer from
1-g to microgravity on the polarity of statocytes and the
role of actin filaments on the positioning of treated and
untreated roots will be conducted during the mission.
Additional plant experiments will study the effects of
microgravity on cell wall regeneration, cell division, and
growth and differentiation of plants from protoplasts.

     A dosimetry experiment will be flown to document the
radiation environment inside the Biorack facility and other
locations inside the SPACEHAB module and the middeck.  The
data will provide a radiation baseline for Biorack payload
elements and in addition, the payload element will be
monitoring the SPACEHAB module along with new orbit
inclination and altitude.


 -- Life Sciences Laboratory Equipment Refrigerator/Freezer
(LSLE R/F): The LSLE R/F is a vapor compression refrigerator
which will be carried in a double rack (with the Biorack) in
the SPACEHAB module.  The LSLE R/F has flown five times on
board the Shuttle.  Its internal volume is 2.5 ft 3 in., and
can accept a variety of racks, shelves and containers, and
maintains internal temperatures ranging from +10 degrees C to
-22 degrees C.  On STS-76, the LSLE R/F will carry processed
samples from the Biorack as well as the Johnson Space Center
Frozen Stowage experiment which includes blood, urine and
saliva samples from the Mir-21 crew.  These samples will be
analyzed on Earth for evidence of accelerated renal stone
development and protein metabolism in microgravity.

 -- Mir Glovebox Stowage (MGBX):  The MGBX will be carried in
soft stowage bags to replenish hardware for the MGBX located
on Mir.  Equipment included in the MGBX includes the
Combustion Experiments Parts Box to be used with the candle
flames in microgravity experiment and the Forced Flow

Flamespread Test, the Passive Accelerometer, the Protein
Crystal Growth Experiment, and the Protein Crystal Growth
Thermal Enclosure System Ancillary.

 -- Queen's University Experiment in Liquid Diffusion
(QUELD).  QUELD will be carried in a soft stowage bag and
middeck locker.

 -- High Temperature Liquid Phase Sintering (LPS).  Developed
by the University of Alabama at Huntsville's (UAH) Consortium
for Materials Development of Space--one of NASA's 11 Centers
for the Commercial Development of Space--the Liquid Phase
Sintering (LPS) experiment will be carried to the Mir space
station aboard STS-76 and will be returned to U.S.
experimenters for analysis following the planned August
Shuttle-Mir docking mission of STS-79.

    The experiment will use the Optizon furnace aboard
Russia's Mir space station.  A variety of metals will be
bonded together in a series of experiments over a two week

period on Mir.  Researchers are using a process called Liquid
Phase Sintering to create these metal composites.  By
conducting these technology experiments in space, new
insights may be gained concerning industrial needs and
operations on Earth.

    As one example, Liquid Phase Sintering experiments in
microgravity may provide greater understanding on how metals
bond.  One area which could benefit from improved metal
composites is the tool industry.



14.0 Mir Environmental Effects Payload (MEEP)

     MEEP, managed by NASA's Langley Research Center,
Hampton, VA, will study the frequency and effects of space
debris striking the Mir space station.  MEEP will study both
human-made and natural space debris, capturing some debris
for later study.  It will be attached to the Mir shuttle

docking module during a spacewalk by  mission specialists
Linda M. Godwin and Michael (Rich) Clifford.

     MEEP also will expose selected and proposed
International Space Station materials to the effects of space
and orbital debris. Because the International Space Station
will be placed in approximately the same Earth orbit as Mir,
flying MEEP aboard Mir will give researchers an opportunity
to test materials for the International Space Station in a
arable orbital position.

MEEP consists of four separate experiments. The Polished
Plate Micrometeoroid and Debris experiment is designed to
study how often space debris hit the station, the sizes of
these debris, the source of the debris, and the damage the
debris would do if it hit the station. The Orbital Debris
Collector experiment is designed to capture orbital debris
and return them to Earth to determine what the debris are
made of and their possible origins.


     The Passive Optical Sample Assembly I and II experiments
consist of various materials that are intended for use on the
International Space Station.  These materials include paint
samples, glass coatings, multi-layer insulation and a variety
of metallic samples.

     MEEP will remain attached to Mir until late 1997, when
the four experiment containers will be retrieved by another
space shuttle crew (STS-86) and returned to Earth for study.
The data will be studied to determine what kind of debris hit
the space station and how those contaminants can actually
collect on some of the different surfaces of a space station,
affecting its surfaces and long-term performance.

     The four MEEP experiments are contained in four Passive
Experiment Carriers (PEC). Each of the four PECs consists of
a sidewall carrier for attachment to the payload bay of
Atlantis (STS-76), a handrail clamp for attachment to the Mir
shuttle docking module, and an experiment container to house
the individual experiment.




15.0 KidSat

     KidSat is a three-year pilot project that will fly on
the shuttle once a year.  This is the project's first flight.
KidSat seeks to give middle school students the opportunity
to participate in space exploration.  KidSat will enable
students to configure their own payload of digital video and
a camera for flight on the Shuttle, command the camera from
their classrooms, and download their images of Earth in near
real-time.  Images will be used as the basis for a variety of
classroom discoveries, including history, geography, geology,
physics, oceanography, mathematics and current events, and as
a means of exploring their own planet using NASA data.

     KidSat will be powered on and tested at three
participating ools on flight day two.  Images will be
posted on the KidSat home page.  Interested public school

districts, teachers, and students may view the images and
information provided by students during the mission via the
World Wide Web site:  http://www.jpl.nasa.gov/kidsat/

Participating Schools

     For the first flight, three pilot districts were
selected on the basis of three criteria: 1) urban schools; 2)
proximity to one of the institutional partners; 3) previous
involvement with Space Shuttle missions.  Each district
selected a classroom to initiate the pilot program:  Samuel
Gompers Secondary School, San Diego, CA (7-8th grade);
Washington Accelerated Learning Center, Pasadena, CA (5th
grade) Buist Academy, Charleston, SC (5-8th grade).

Institutional Partners

The KidSat concept was inspired by a group of high school
students working on a Shuttle mission as part of the Jet
Propulsion Laboratory's (JPL) collaboration with The Johns

Hopkins University Institute for Academic Advancement of
Youth (IAAY).  The program was developed by JPL, IAAY and the
Univeristy of California, San Diego (UCSD).  JPL has the lead
role in the project management of KidSat, the development of
the remote sensing instruments and cameras, and the data
system.  The UCSD provides the mission operations for this
program, and IAAY is leading the curriculum development,
teacher training, and evaluation.  Significant support from
the Johnson Space Center also is a key element of this
project, and the first digital still camera is a Kodak
DC460C.  The project is supported by NASA's Office of Human
Resources and Education, Washington, DC,  with support from
NASA's Office of Mission to Planet Earth, Office of Space
Flight, and the Office of Space Science, Washington, DC.



16.0 Shuttle Amateur Radio Experiment (SAREX)

     U.S. students will have a chance to speak via amateur

radio with astronauts aboard STS-76.  Ground-based amateur
radio operators ("hams") will be able to contact shuttle
astronauts through a direct voice ham radio link as time
permits.

     Shuttle Pilot Richard A. Searfoss (call sign KC5CKM) and
mission specialists Linda Godwin (N5RAX), Ron Sega (KC5ETH)
and Shannon Lucid (call sign pending) as well as Commander
Chilton will talk with students in five U.S. schools using
ham radio.

     Students in the following schools will have the
opportunity to talk directly with orbiting astronauts for
approximately 4 to 8 minutes:

 -- Artesia Public Schools, Artesia, NM
 -- Troy Middle School, Troy, TX
 -- S.J. Davis Middle School, San Antonio, TX
 -- Bethlehem Central Senior High School, Delmar, NY
 -- University of Colorado, Colorado Springs, CO


     The radio contacts are part of the SAREX (Shuttle
Amateur Radio EXperiment) project, a joint effort by NASA,
the American Radio Relay League (ARRL), and the Radio Amateur
Satellite Corporation (AMSAT).

     The amateur radio station at the Goddard Space Flight
Center,Greenbelt, MD, (WA3NAN), will operate around the clock
during the mission, providing SAREX information, and
retransmitting live Shuttle air-to-ground audio.  The Goddard
amateur radio club's planned HF operating frequencies are:

 -- 3.860 MHz   7.185 MHz
 -- 14.295    21.395
 -- 28.650

    Information about orbital elements, contact times,
frequencies and crew operating schedules will be available
during the mission.  Current Keplerian elements to track the
Shuttle and SAREX specific information are available from the

following sources:

  --   NASA Spacelink computer information system
  BBS: (205) 895-0028
  Internet, Telnet, FTP, Gopher: spacelink.msfc.nasa.gov
  WWW:  http://spacelink.msfc.nasa.gov

  --   NASA SAREX WWW Home Page:
http//www.nasa.gov/sarex/
sarex_mainpage.html


 --   American Radio Relay League
  Telephone:  (860) 594-0301
  BBS: (860) 594-0306
  WWW:  http://www.arrl.org

 --   AMSAT
  Telephone:  Frank Bauer (AMSAT/NASA) (301) 286-8496
  WWW:   http://www.amsat.org3


  --   NASA Johnson Space Center Amateur Radio Club
  BBS:  (713) 244-5625

--   Goddard Amateur Radio Club
  BBS:  (301) 286-4137
  WWW:  http://garc.gsfc.nasa.gov/www/garc-home-page.html

STS-76 SAREX Frequencies

IMPORTANT NOTE:  Since the flight is a Shuttle-Mir docking
mission, and SAREX and Mir amateur radio stations usually
share the same downlink frequency (145.55), the SAREX Working
Group has decided to make the following SAREX frequency
changes for the STS-76 mission:

Worldwide downlink frequency is 145.84MHz.

 The voice uplink frequencies are:
     144.45, 144.47 MHz



   Note:   Ham operators should not transmit on the
Shuttle's downlink frequency.  The downlink is your receiving
frequency.  The uplink is your transmitting frequency. In
addition, the astronauts will not favor any one of the above
frequencies.  Therefore, the ability to talk with an
astronaut depends on selecting one of the above frequencies
chosen by the astronaut.



17.0 Trapped Ions in Space (TRIS)

     The Naval Research Laboratory's (NRL's) Trapped Ions in
Space (TRIS) experiment will fly as a Get Away Special
payload on STS-76.  TRIS will measure a recently-discovered
belt of energetic cosmic ray nuclei trapped in Earth's
magnetic field to quantify radiation hazards in space and
lead to a better theoretical understanding of how these

cosmic ray nuclei have become trapped in the Earth's magnetic
field.

     So-called "anomalous cosmic rays", which originate in
the nearby interstellar medium, form the radiation belt which
TRIS will observe.  These trapped anomalous cosmic rays, say
the researchers, have sufficient energy to pose a potential
radiation hazard to some lightly shielded electronic systems
planned for the International Space Station and perhaps to
astronauts during spacewalks in certain parts of the orbit.

Although the existence of this radiation belt was
predicted by scientists in 1977, it was not confirmed until
1991, when an NRL-led team of U.S. and Russian scientists
compared satellite data from both countries.   Since 1992
trapped anomalous cosmic rays have also been observed by
experiments aboard NASA's Solar, Anomalous, and
Magnetospheric Particle Experiment (SAMPEX) satellite at an
altitude of about 372 miles.  At present, however, there is
insufficient theoretical understanding of trapped anomalous

s to extrapolate from the SAMPEX observations down
to altitudes of 217-279 miles, where the Russian Space
Station Mir is located and where the ISS will operate.
Scientists will be able to compare simultaneous observations
from TRIS and SAMPEX to bridge this gap.

     TRIS, which previously flew on a space shuttle mission
in 1984, measures and identifies cosmic ray nuclei using
polycarbonate detectors, including some of the same type that
are routinely used in the astronauts' dosimeter badges.
Ionizing particles produce trails of radiation damage as they
pass through these detectors.  After return from space, the
detectors are chemically etched in the laboratory to revea
the damage trails, which are then measured with high-
precision microscopes.  The atomic numbers, energies, and
arrival directions of the cosmic ray nuclei are determined
from these measurements.

     TRIS was built by NRL's Space Science Division.  The
flight is being sponsored by the U.S. Air Force Space Test

Program office at the Johnson Space Center.



18.0 Crew Biographies

Note:  Complete biographical information on all NASA
astronauts is available through the NASA Shuttle Web home
page on: http://shuttle.nasa.gov.

STS-76 CREW

Kevin Chilton (Col., USAF) was born November 3, 1954 in Los
Angeles, CA.  He received a bachelor of science degree in
engineering science in 1976 from the U.S. Air Force Academy
and a master of science degree in mechanical engineering from
Columbia University on a Guggenheim Fellowship in 1977.  He
became an astronaut in 1988 and served as pilot on his first
two Shuttle flights, STS-49 in 1992 and STS-59 in 1994.


Richard Searfoss (Lt. Col., USAF) was born on June 5, 1956 in
Mount Clemens, MI, but considers Portsmouth, NH, to be his
hometown.  He received a bachelor of science degree in
aeronautical engineering from the USAF Academy in 1978 and a
master of science degree in aeronautics from the California
Institute of Technology on a National Science Foundation
Fellowship in 1979.  Searfoss was selected to join the
 corps in 1990 and  served as pilot on his first
Shuttle flight, STS-58 in 1993.

Ronald Sega (Ph.D.) was born December 4, 1952 in Cleveland,
OH, but considers Northfield, OH, and Colorado Springs, CO,
to be his hometowns.  He received a bachelor of science
degree in mathematics and physics from the U.S. Air Force
Academy in 1974, a master of science degree in physics from
Ohio State in 1975 and a doctorate in electrical engineering
from thef Colorado in 1982.  Sega became an
astronaut in 1991 and served as a mission specialist on his
first spac, STS-60 in 1994.

M. Richard Clifford (Lt. Col., USA, ret.) was born October
13, 1952 in San Bernardino, CA, but considers Ogden, UT, to
be his hometown.   He received a bachelor of science degree
from the United States Military Academy, West Point, New
York, in 1974 and a master of science degree in aerospace
engineering from the Georgia Institute of Technology in 1982.
Clifford was selected as an astronaut in 1990 and has flown
as a mission specialist on two previous Shuttle flights, STS-
53 in November 1992 and STS-59 in April 1994.

Linda Godwin (Ph.D.) was born July 2, 1952 in Cape Girardeau,
MOJackson, MO, to be her hometown.   She
received a bachelor of science degree in mathematics and
physics from Southeast Missouri State in 1974 and a master of
science degree and a doctorate in physics from the University
of Missouri in 1976 and 1980.  Godwin began working at NASA
in 1980 and became an astronaut six years later.  She has
flown in space twice, on STS-37 in April 1991 and STS-59 in
April 1994.

Shannon Lucid (Ph.D.) was born January 14, 1943 in Shanghai,
China but considers Bethany, OK, to be her hometown.  She
received a bachelor of science degree in chemistry from th
University of Oklahoma in 1963 and a master of science and
doctor of philosophy degrees in biochemistry from the
University of Oklahoma in 1970 and 1973, respectively.
Lucid was selected as an astronaut in 1978 and has served as
a mission specialist on four previous Shuttle flights, STS
51-B in 1985, STS-34 in 1989, STS-43 in 1991 and STS-58 in
1993.  At the conclusion of Shuttle-Mir joint-docked
operations, Lucid will remain aboard Mir serving as a station
researcher.  She will return to Earth when Atlantis again
docks to Mir during mission STS-79 in August 1996.

MIR-21 CREW

Yuri Onufrienko (Mir-21 Commander) - was born February 6,
1961 in the village of Ryasnoye, Zolochevsk district, Kharlov
region, Russia.  He graduated from the V.M. Komarov Eisk
Higher Military Aviation School for Pilots in 1982 with a

pilot-engineer's diploma.  He was assigned to the Gagarin
Cosmonaut Training Center in 1989.  From September 1989 to
January 1991 he attended the general space training course.
From April 1991 to February 1994 he trained for space flight
as part of the test-cosmonaut group in the Mir orbital
station program.  From February 1994 to February 1995 he
trained for flight as backup crew commander for Mir-18 and
Mir-Shuttle programs.  From March to June 1995 he trained for
flight on the Mir station for Mir-19 and Mir-Shuttle programs
as the commander of the backup crew.  Since June 1995, he
trained for space flight in the Soyuz-TM transport vehicle
and Mir station as commander of the main crew for Mir-21.
Onufrienko along with Mir-21 Flight Engineer Yuri Usachev
were launched aboard a Soyuz-TM transport vehicle on the
start of the Mir-21 mission on February 21, 1996.  Onufrienko
and Usachev docked to the Mir station two days later.  The
Mir-21 mission is Onufrienko's first space flight mission.

Yuri Usachev (Mir-21 Flight Engineer) - was born October 9,
1957 in the city of Donetsk, Rostov Region, Russia.  He

graduated from the Moscow Aviation Institute in 1985.  Since
1985 he has worked at the RSC Energia.  He joined the
cosmonauts of RSC Energia in 1989.  From September 1989 to
January 1991 he attended the general space training course at
the Gagarin Cosmonaut Training Center.  From April 1991 to
August 1992 he trained for space flights as a member of the
test-cosmonaut group in the Mir station program.  In 1992 and
1993 he trained for flight on the Mir complex in the Mir-13
program as flight engineer of the backup crew.  From February
to June 1993 he trained for flight on the Mir complex in the
programs Mir-14 and Altaire (France) as flight engineer of
the backup crew.  From August 1993 to January 1994 he trained
in the Mir-15 program as flight engineer of the main crew.
From January to July 1994 he flew on the Mir complex for 182
days.  From April to June 1995 he trained for flight on the
Mir station as flight engineer of the backup crew in the Mir-
19 and Mir-Shuttle programs.  Since June 1995, he trained for
space flight in the Soyuz-TM transport vehicle and Mir
station as flight engineer of the main crew for Mir-21.
Usachev along with  Mir-21 Commander Yuri Onufrienko were

launched aboard a Soyuz-TM transport vehicle on the start of
the Mir-21 mission on February 21, 1996.  They docked to the
Mir station two days later.   The Mir-21 mission is Usachev's
second space flight mission.

















