I hint about the only person around it
doesn't have TV coverage of the things
that man got the black up now you're
gonna be getting a TV picture now
they'll yes we are getting a TV picture
one all
yeah
ok I've got another the year was
nineteen sixty-five astronaut head white
was the first American ever to venture
out of the safety of a spacecraft for 23
minutes he was the spacecraft conducting
the first extra vehicular activity or
evaa many more would follow astronauts
dawn spacesuits to explore the moon
during Apollo to perform repairs in the
first u.s. space station Skylab in the
nineteen seventies and to perform all
inspiring meats from the space shuttle
from flying in space untethered to
capturing a faulty satellite by hand
got a light but the greatest challenge
for spacewalkers lies ahead with the
Assembly of the International Space
Station the biggest spacecraft ever
built
astronauts will assemble the station in
Earth orbit largely by hand
assisted by a new generation of space
robotics hundreds of cables and lines
carrying our fluids gases and
communications will be manually
connected during 75 different spacewalks
for a total of over 500 hours more
spacewalking hours than NASA has
conducted in its entire history it will
be one of the most exciting and
difficult challenges ever confronted in
orbit for almost the past decade
nASA has been preparing for the new era
of EA and arrow astronauts will turn
Earth orbit into a hands-on construction
site special tools techniques and
equipment have been designed and
regularly tested in space as nASA has
geared up for the job
one of the first challenges to overcome
was the location of the worksite
the space shuttle will carry its orbital
construction workers 250 miles above the
earth where the astronauts assembling
the station will encounter new
temperature extremes for space and I
think we've had the test two in the
neighborhood of 250 275 degrees below
zero and in the other extreme it can be
200 or more degrees above zero to
prepare for station construction space
suits were redesigned so that astronauts
could lower the cooling in the suit
during the frigid orbital nights and
activate fingertip meters in the gloves
astronaut mike Earnhardt tested the
improved suit for a short period time
about 25 minutes or so I was up on the
arm in the coldest possible place on the
shadow and it turned out these
modifications were wonderful i was
completely comfortable to make better
workflows for astronauts new helmet
lights new tool holders and other
improvements have been added to the
spaces so some space suits can remain on
the station for maintenance tasks a
resizing capability has even been added
so different crew members can fit into
the same suit saving space and lowering
costs in addition to suit enhancements
for spacewalks a variety of power tools
pliers and wrenches and developed
specifically designed for the
nuts-and-bolts worth of station assembly
NASA also has addressed the problem of
how to carry those rules across the
length of the station which is equal to
the size of a football field we needed a
more efficient way for the crew members
to be able to transport themselves and
tools and repair parts around on the
outside of the station and i sat down
with the station personnel and basically
on the back of a piece of paper sketched
out what eventually became the sea the
card crew and equipment translation
assembly in 1991 three versions of the
cart were tested in the shuttle payload
Bay one even resembling a railroad cart
the final decision was to use the manual
powered Sita cart which will allow
astronauts to slide themselves and their
tools along the 350 foot trust of the
station working with tools in the
weightlessness of space can present own
unique challenges for astronauts
the biggest thing that is different
space is that you really have to be
careful about starting a rate that is if
you start to spin around you're gonna
keep spinning until you can grab
something and stop that to provide an
anchor point for astronauts widget
tethers portable work platforms and foot
restraints have been developed and
tested and will become a standard during
station assembly the space tools and
equipment will assist astronauts with a
primary task to connect hundreds of
wires and cables creating a network for
our communications fluids and gases
running along the outside of the station
shuttle astronauts have already
practiced and tested techniques in space
to fasten peoples and connect fluid and
power lines in addition the hubble space
telescope servicing missions added
important experience in making cable
connections astronauts discovered that
flexible bundles of cables can become as
stiff as lead pipes in the children's
space and repetitive connecting tasks
can cause and fatigue when working in
bulky pressurized gloves new measures
have been developed to ensure the
astronauts safety during Space Station
construction as well a primary concern
is staying connected to the station
unlike the Space Shuttle the station
cannot retrieve an astronaut ed drifts
away astronauts have tested various
types of tethers for station assembly
but should someone become disconnected
from the spacecraft a special space life
jacket has been developed called safer
during flight test for safer astronaut
Mark Lee found that matter which
direction he was turned the safer could
always help him find his way on you had
an attitude holds you can hit the
attitude holding whether what it would
do is stop you you may be stopping when
you're looking out and you know in deep
space and you realize all the shuttles
and back and so you turn around once you
get references then you can orient
yourself and fly back even with shuttle
flights to prepare for station assembly
building a space station takes practice
the neutral buoyancy lab at the Johnson
Space Center has been called the biggest
swimming pool in the world
the 6.5 million gallon facility was
constructed specifically for astronauts
to rehearse spacestation assembly tasks
the best way that we have found here on
the ground to replicate its best we can
what it's like to actually be in zero
gravity of space and be in your space
suit and do an EVP a or spacewalk is to
put a crew member into a spacesuit put
them into the water at 40 feet deep the
pool is large enough to house full scale
replicas of the giant space station
components providing astronauts a
realistic setting for their training
during assembly the astronauts won't be
alone
they will be joined by robots the
shuttles canadian-built robot arm which
has demonstrated time and again its
ability to deploy and retrieve large
satellites will be used to maneuver
large pieces of the station for the big
tasks you get the robot to do it just
like a construction site on earth you
get the crane to lift the heavy pc put
in place and then once it's in place
someone comes in and does up the bolts
and plugs it in and and if something's
not working right they can get in there
by hand and fix it
eventually the space station will
receive its own robot are also built by
canada representing the next generation
in robotics it will have war
capabilities specifically designed for
station assembly and me it's got more
joints more articulating in other words
it has the ability to abandon more
places than the shoulder elbow and wrist
that this shuttle on has the new arm
will even have the ability to attach
itself on one and then disconnect on the
other end effectively inchworm me across
the station a new robotic canada hand
can be attached to the end of the arm
for work and intricate tasks that were
impossible for past robotics as robotic
arms and hands assist during station
assembly and maintenance robotic eyes
will give astronauts a new visual
advantage a small free-flying
basketball-sized robot called AirCam
will be used to conduct up-close site
surveys of the station and assist in
EPA's by broadcasting video back to
station crews are ground control
the little robots views may cut down the
amount of time humans up to spend
conducting spacewalks another set of
ours called the space vision system will
provide far more than just pictures
tested on several shuttle missions
the system uses targets the shuttles
payload Bay cameras and a series of
computers to create an artificial image
of a module providing precision
information to the robot arm operator
where it should be moved the
international space station will be
covered with clothes to 250 space vision
system targets to help astronauts with
assembly just as astronauts rehearse on
the earth for spacewalking robotic
assembly operations must also be
practiced at the Johnson Space Center
astronauts use giant inflatable balloons
to stand in for Station modules giving
them a chance to practice robot arm
operations in addition a domed a
simulator uses computer animation to
allow astronauts to rehearse the
assembly missions with realistic visuals
training in the simulators and the
real-space experience gained from past
shuttle flights are all coming together
preparing astronauts in the best ways
possible for the assembly work that lies
ahead for considerably smarter
it's been an evolutionary process we
continue to get better tools better
equipment better procedures we do have a
tremendous challenge ahead of us is
going to be one more exciting . manned
spaceflight for facing those challenges
there will be rewards the Assembly of
the International Space Station will
create a state-of-the-art laboratory
complex in space to study medicine
science and the environment a
cooperative effort of 15 nations it is
the most complex international project
ever conducted
ultimately the lessons learned and the
technology developed from building the
station will also help blazed the trail
for further exploration beyond Earth's
orbit it gives all of us working on
carrying human presence father in the
solar system much more experience and
experience that really we can't do it
out if you want to
back out to noon or way out into space
to visit Mars one day there's really a
an unavoidable path that you have to go
through to gain that experience and
space station provides that stepping
stone to to go down
person around it doesn't have TV
coverage of the face and it man you got
the black up now you're gonna feel
better in the morning TV picture never
fail us we are getting
one all
family
