Preflight
Interview: Ed Lu
The
STS-106 Crew Interviews with Ed Lu, Mission Specialist 1.
Ed, you began your professional career as an engineer
and a research physicist before coming to work for NASA here
in Houston. Why did you want to be an astronaut?
Well, I'd
always been interested in space, even as a little kid, and flying
things and that sort of stuff, although it wasn't something that
I thought that I was ever going to do. And it kind of happened
by chance: I heard about the possibility of applying, I talked
to a friend about it; he went and sent an application in and said,
hey, you ought to send one in, too. So, I sent an application
in…this was when I was working as a research scientist. And
about a year-and-a-half later, I got a phone call saying, hey,
do you want to come on down for an interview, and that's how I
ended up here. It wasn't some sort of preordained thing where
I had been planning it my whole life, which is perhaps a little
bit different than a lot of the astronauts.
Let's talk a bit about the route that got you here. Talk
about the different kinds of jobs that you had that prepared
you, that helped fill out that application that you sent in
to Houston.
Well, I
don't know what really filled out my application or what sorts
of things they were looking for, but what I did was I was an engineer,
I got my degree in electrical engineering, and then after that
I went to grad school to study theoretical physics. And, I worked
in different areas of astrophysics and I was working as a research
scientist up until the point when I came here. I had a lot of
flying experience, general aviation-type flying experience, before
I came here, but nothing like the kind of things that you do here.
But I had been flying airplanes for over ten years by the time
I had gotten here.
Your NASA biography also has a list of other interests
that's as long as somebody's arm. Is there. . .
I made it
all up!
. . . is there anything that you don't enjoy doing? New
experiences that you go, eh, forget it?
Oh, not
really. I guess I'm more limited by the amount of time I've got
in a day than the things that you want to do. There's always more
places you want to go, more things you want to do, things you
want to try, than you've got time to do…or money.
As you look back, your college career, back to your childhood,
throughout your career as an astronaut, can you identify a few
of the people that you look back at as being the most influential
in your life? People who've really made a contribution to you
becoming the man you are.
Well, I
suppose everybody says this but, of course, your parents are the
biggest influence in your life, and they were in mine. They encouraged
me to do things and to, to work hard at things, and they supported
me through all the things that I would force them to put up with.
And so they're probably the biggest influence in my life.
Your first space flight, STS-84, was the sixth in the
series of space shuttle missions to the Mir space station, and
you even had one Russian and one French crewmate on that trip.
Does that experience of having worked with people from other
nations and other space agencies help you in your preparation
for this mission you're about to embark on?
Well, not
so much the experience of working with people from other countries
in that I had a lot of experience with that before I ever came
to NASA, just working as a scientist, which is a very international
field. But particular, on that flight, what I think helped me
here was to learn the Russian system: The fact that we had been
to Russia. I had been to there several times before I was assigned
to this flight, and that I knew a lot of the people, I knew a
lot of what was going on over there, and that helped a lot because
this flight is as much a Russian flight as it is an American shuttle
flight. So it involves training over in Russia, working with Russians,
having now two Russian crewmates, and working on Russian equipment,
which is not the usual standard shuttle flight up until now.
Is that what you have in mind when you say that this is
as much a Russian flight as it is a space shuttle flight?
Well, it
is, because most of, like I said, of our equipment that we'll
be working with once we get in orbit will be Russian-built and
-designed, and even a lot of our procedures are written by Russian
designers. And we, as a crew, have spent many months over in Russia
training to do the space walk and to do all the installation procedures
that we'll be doing to outfit the Service Module.
Let's talk about this mission. Historically, now, the
space shuttle program has planned missions for years in advance,
and flight crews and ground crews have spent a year or more
in preparation. Well, the fact is you and your two Russian crewmates
on this mission had been training with four completely different
crewmates for quite some time when you were switched to become
part of the crew for this mission, and at the time you only
had a few months before the launch. First, tell us about the
factors that were involved in the decision to add STS-106 to
the flight schedule, and what it was like for you to and your
crewmates to move yourselves from being part of one group to
being part of another.
Well, the
big reason that they have a 106 mission to begin with is the fact
that there was a delay in the launch of the Service Module. And
that was due to the fact that the rocket that was supposed to
carry it up, the Proton, had a failure last October, and that
meant that the Service Module was not going to be launched per
its original schedule. And what happened then is that the pieces
of the station that are still in orbit were starting to decay
to a lower orbit, and that required a mission to go up sooner
or to go up on the original schedule. And, given that the Service
Module was going to be late, they wanted the folks who had originally
trained to work with most of the Service Module things to still
fly on that mission. But, now you require a mission to do some
preliminary work on the parts of the station that were already
in orbit as well as to reboost its orbit. So that's how we ended
up with two separate missions, and that's how Yuri, Boris and
myself ended up on this second flight, which was really, originally,
the first flight. And one of the hard things about it was the
fact that it takes a while to get a crew to work together as a
crew, and while you may know all the procedures, you need to know
what everybody else is doing and how they're doing it in order
to work effectively as a team - you can't be sort of seven individuals
off doing your own thing. And, so it takes a little bit of time
to gel together as a crew. And we've done that now, but we had
a very short period of time to do that. And in the end, it has
worked out, and we're working together as well as the old 101
crew did back in February when there was still only one flight.
Given the circumstances, then, what have been the biggest
challenges for you and for your crewmates in getting ready?
Well, the
biggest problem has been lack of time, so we've had a very compressed
training schedule. I think we've had about a little less than
half the time that the STS-101 crew originally had to train for
their mission. It's not as dire because three of us had come over
from the other mission, and also a lot of the preliminary work
had been done by the original 101 crew in setting up procedures
and figuring out how things should work. So, it was not as bad
as you might think in terms of training, all that, in a short
period of time. But the big problem has been time management,
figuring out how to make everything fit into the limited time
that we have before launch.
And that's worked out pretty well?
Yeah. It
has worked out, and I think we'll do just fine, and I think we'll
go into the flight ready and not overly beat up and tired from,
you know, having stayed up all night for six months!
Let's talk about what you're going to do. Your flight
is the first shuttle mission to fly since the arrival of the
Service Module. You're going to be docking with a station that
not only has that new module, but also has a Progress supply
ship docked to the far end of it. Talk us through the steps
of what's involved on rendezvous day - if you could paint us
a word picture of what's going to happen as Terry Wilcutt flies
the rendezvous, and point out what you'll be doing as, as part
of that team.
Well, Atlantis
will be coming will be following the station in orbit around the
Earth, so we'll be behind it by many miles. And on rendezvous
day we'll actually come up from below it. If this is the station
moving along, we'll come up below it in the shuttle like this,
and then move up to a point where we're about five-hundred feet
from the shuttle, and then we'll fly around it half way to come
down on the station from above. During all of that, what I'll
be doing is operating a set of computers, which takes in all the
data from our sensors, which tell us what is our relative position
with respect to the station and how fast are we closing with it
or opening from it, or what is our direction of motion with respect
to that. And those computers will put up a series of displays,
which will help Terry fly the shuttle in to that docking.
The day after that docking is complete there's some work
to be done on the outside of the station, and you and Yuri Malenchenko
are going to get to go outside for some six-and-a-half hours
to do that. It's only the second space walk ever from the shuttle
by an astronaut-and-cosmonaut team. Before we talk about the
details of your space walk, talk about this situation, if you
will: What is it that we learn from having a person from one
space agency and a person from a second space agency do the
space walk together? Is there something specific about that
combination or that cooperation that's of value?
Well, once
we go outside neither of us is going to think, where is the other
person from. he's your partner, he's your crewmate, and that's
the way we've been trying to train this, just like any other space
walk. The whole goal is to make it so it doesn't matter where
they're from. It doesn't matter who he works for or who I work
for. The point is that we've got a job to do, and Yuri is a very
talented cosmonaut. He's already done two space walks. And I'm
looking forward to working with him because of his wealth of experience
out there, and I'm sure I'm going to be able to learn a lot. I
have learned a lot from him during our training flow, and I'm
sure I'll learn more from him once we get outside.
Well, as you almost pointed out, this is going to be your
first space walk. What do you anticipate it's going to be like
the first time you float out of the airlock out into the payload
bay?
Well, I
guess, I'll probably end up being like many other astronauts who
I've talked to about their first time going outside, where they
end up saying, Oh, you end up so focused on doing your job that
you kind of forget a little bit to look around. And you have to
remind yourself every once in a while, hey, look at where you
are for just a second! You know, take a look at the Earth for
a second…sneak a peak at where you are, and think about that
every once in a while so you don't come back inside and say, wow,
did that all really happen or not? And I'll think I'll probably
end up being just like that, having to force myself every once
in a while to just take in the scene a little bit.
The space walk, to summarize, is to help set up and activate the
Service Module, to help connect it to this, parts of the space
station that are up there. The first task on the timeline, I believe,
as it exists today is installation of a magnetometer on the outside
of the module.
Let's
talk about the space walk and begin with that, and if you could
describe what a magnetometer is, what its function on the station
is, and the steps for you and Yuri to complete that task.
Well, actually
the first thing we have to do is get out to the work site, and
as it turns out the work sites where we'll be working on the Service
Module, are about a hundred or so feet from the airlock. And the
thing that makes this different from all the previous shuttle
space walks and most of the following assembly flights, which
are coming up, is that we will be using what's called a Russian
tether protocol. We will be traveling along the outside parts
of the Russian segment, which do not have the ability to run a
retractable tether from a location called the slide wire, which
we can move. And what you do in the shuttle is you attach yourself
by this tether which you never disconnect, and that way you can
move around the shuttle payload bay or move around the station
without just using your two hands to move around without worrying
about tethering off to places. However, we're going to be moving
around the station and around various targets and sensors and
things like that, so we will not be able to drag behind us a long
tether, which is, you know, going back many feet. So, what that
means is that we have a, sort of a very different task. The way
we are going to move around is to carry two tethers and constantly
make and break connections, sort of like the way a rock climber
might move who is putting up ropes at various places. You know
that alone makes us a very different space walk than the kinds
that we've seen previously. In fact, that is the way that the
Russians have always done their space walks, 'cause their space
walks have been done outside the Mir. So it'll take us a while
to get our equipment and get it all out there. Because this type
of translation is so much slower we won't have the ability to
come back to the shuttle to pick up more equipment - in other
words, to make multiple trips. So, what we're going to do is carry
all of the equipment and everything we need - the cables, the
tools, etc. - all at once. So we're going to have to pile these
things onto the backs of our spacesuits, and basically be pack
mules all the way out there. Once we finally get out to the work
site, the first thing, as you said, we'll be installing is the
magnetometer. What that is is basically it's like a three-dimensional
compass: It's a sensor, which is used to tell what the orientation
is of the spacecraft, of the entire station, with respect to the
Earth. You know here on the ground a compass will point basically
towards magnetic north, but in space the magnetic field of the
Earth is curved, and it, it points down, again, towards the magnetic
North Pole. And if you have a model of how that magnetic field
looks or if you know what that looks like, and you have something
that can measure which direction the magnetic field is pointing,
you can figure out which way the ship is pointed with respect
to the Earth. Now, one of the problems with that is that, if you've
ever played with a magnetic compass, you know that if it gets
near any piece of metal that has any iron in it, or any electrical
currents, it's going to make that needle swing around. Now, this
thing doesn't have a needle on board, but it is effected in the
same way by any types of magnetic materials, magnetic metals or
electrical currents, of which there are many on the station. So
what you have to do is stick it on a pole so it's some distance
away from the rest of the station. So what we'll be doing is putting
together a pole and mounting this magnetometer onto this pole,
which will be out over the nose of the shuttle. It'll be mounted
to the Service Module but Yuri and I will be a hundred or so feet
out over the nose of the shuttle, looking down through the forward
windows of the shuttle down below us. And then, after that, the
main task, actually, of the EVA is to connect electrical cables
between the Service Module and the FGB, which is the part of the
station that's already up there now. So once they dock there will
not be electrical connections between them, and we'll be bringing
out with us reels of cable on something which looks like garden
hose reels. We'll be unreeling these things and running them along
the outside part of the Service Module to attach them to connectors
on the part that's already up there now.
Are these cable connections, that job, similar to what
we saw on STS-88 when, Jim Newman and Jerry Ross made connections
between Zarya and Unity?
In some
ways similar, but the big difference is that we are going to be
carrying the cables out with us and also the, the clamps that
hold down the cables all the way along the path. So, rather than
just making connections we will be setting up the pathway along
which we can run the cables, too. So most of us the job is actually
laying down of the cable rather than just making the connections
at the end. So, it's a little bit different. The cables are pretty
long. Some of them are over ten meters long, so thirty or so feet
of cable, which in weightlessness is a little hard to handle,
or can become hard to handle, which is the purpose of having them
rolled up on reels rather than just bringing them out, because
if you have a thirty-foot weightless cable, it would become like
a giant snake in orbit, and it would be tough to control and keep
it from snagging on things. So we'll be actually unreeling it
along the outside of the Service Module.
And you've pointed out a couple of times that you're going
to be working on the outside of Zvezda, which is going to be
quite a distance away from the shuttle - farther away than the
robot arm on the shuttle can reach, and yet the arm is involved
in what you're going to do. Talk about how that, you coordinate
the activity of that fifty-foot-long arm with what you and Yuri
are going to be doing around the station.
Well, there's
two reasons that we're going to be using the arm. One is to avoid
having to do as much of that hand-over-hand, mountain-climbing
technique as possible. We're going to use the arm to drop us off
partway up, and that'll eliminate maybe fifty feet of the hand-over-hand
motion, which will save us a lot of time. And the other thing
they'll be doing with the arm is using it to take images. There's
a camera on the end of the arm. And since we'll be out over the
nose of the shuttle, where there's no camera views possible and
also no way for the people inside the shuttle to see what we're
doing, they will actually move, Rick will move the arm out in
front of the shuttle and point back at the space station to get
a view of us so that they can follow with us; the procedures in
the checklist.
Before we leave the question of the space walk, I want
to get you to talk a little bit about the training that's been
involved. Not only over the course of, of quite a long time,
as you've moved from one mission to another, but over great
distance. You've trained in the Neutral Buoyancy Laboratory
here in Houston as well as the Hydrolab in Star City. Talk about
the reasons why you train in the two places, and, and how that
training has been of advantage to you.
Well, the
neat part about it is, both the neat part about it and the disadvantage
of it, is that half of the EVA can only be trained here in Houston,
and those are the things involving the shuttle airlock, the shuttle
arm, and the Node, which is the part which the station will actually
be connected to. The other half of the space walk, or actually,
the majority of what we're doing, the only mock-up in existence
is in Russia in their version of the Neutral Buoyancy Lab, some
- they call the Hydrolab - and so what we've been doing is training
half of the space walk here and half of it over in Russia, and
this has required us to go back and forth to Russia many times.
In fact, we've made five trips over there to Russia in the last
year-and-a-half, and we have trained extensively in their pool,
their Hydrolab, which has been an amazing experience. We're the
first shuttle crew to ever train in the Hydrolab, and that required
us to bring a whole series of U.S. training suits and all of our
hardware out to Russia and build adapters such that our suits
could be powered off of their oxygen supply systems. And that
required an awful lot of work by a lot of our engineers in order
to make all this happen.
It sounds like there would be quite a few people involved
in, over the course of time, in making that training work.
Yeah, there
were a fair number of folks heading back and forth to Russia along
with our crew. In fact, those people actually put in a lot more
time than us over there, because they would have to go out there
before we ever got there to help set up the suits, for instance,
and the equipment. And they wouldn't get to leave until afterwards
because after we all left, all that equipment has to be packed
up and brought back to the U.S. And, so while our travel schedules
were hectic, theirs were even more so.
The day after your space walk is the day that you all
are going to enter the International Space Station for the first
time and become the first people to ever enter Zvezda on orbit.
You got any sense, at this point, how you're going to be feeling
to be present for that event?
Well, I
hope someday to get a chance to fly as a permanent crewmember
on board one of the long-duration flights. So, obviously, it will
be a first look at the core of the station, but also maybe, someday,
a future look at my future home for a few months.
Service Module is described as the early living quarters
for the long-duration crews; I'd like to ask you to share the
benefit of your training and help introduce us to this piece
of hardware. What is it that Zvezda provides that permits permanent
human habitation? What kind of equipment does it have? What
control systems, etc., etc.,? Well, "who" is Zvezda?
Well, it
will provide the main life support system for the station at this
point. And that means, so up until right now, you could not have
a crew living on board the station because there is no oxygen
generation, there is no CO2 removal, there is no water system
on board. What they've got up there right now will provide power,
for instance and so on, and you can have people go inside as long
as it's docked to something like a shuttle, but you can't permanently
live up there. What the Service Module will provide is the main
computers to control the electrical system, the orient, the motion
control system, which is basically the system that figures out
where it is and how it should be pointed and operates all the,
you know, the jets or the gyroscopes that control the motion in
the system. And like I said, the main thing is it provides all
the life support equipment you need. Now, the big thing is that
most of this equipment, or much of this equipment, will not be
launched when the Service Module is launched; it weighs too much
to launch it all together. And so our job will be to bring those
systems up separately or - or actually some of them will also
be brought up on board the Progress freighter which will, which
will also be up there - and to install them into the Service Module.
Let's continue the story then. You've done first steps
of activating and connecting this module on the outside. Now
you're going to be working on the inside. Take us through some
of that and what you know are some of the most important pieces
of hardware or systems that have to be installed.
Well, we'll
be basically opening up panels and getting right in there with
much of the electrical system - three battery units and their
associated electronics boxes. The reason you have these big battery
units is because the station is powered by solar arrays, and,
well, it goes behind the Earth every forty minutes or so, and
so you need to store power for the times when it's on the night
side of the Earth. And, so what you do is, you have these large
storage batteries that store electrical power on the day sides
of the orbit and then you switch over to battery power during
the night side. Now these batteries are quite heavy and bulky,
and that's why we're carrying them up. So we'll be installing
those and along with all the equipment that it takes to figure
out how to charge these things and discharge them; you need a
set of electronics that controls the charging and so on of these
batteries. So, all of that will be installed by us, and that'll
happen in the first few days after we get up there. The other
things that we're going to be installing are parts of the oxygen
generation system. What they've got on board is a system which
will take water and break that down, just basically running an
electrical current through it, breaks it down into hydrogen and
oxygen; you vent the hydrogen overboard and you breathe the oxygen.
So, that system will be mostly installed by us. We will not actually
start the system up, but we'll have it ready for the first crew,
Expedition 1, who will come up a couple of months after us, to
be able to activate that system rapidly; they don't want us to,
uh, get the water into the system while it's not being used. So
we'll actually install these pieces and have 'em ready to be activated
as soon as those guys get back up there. We'll also install pieces
of the CO2 removal system, and we'll also be working with some
of the communication systems. We'll be doing a lot of testing
and checkout of these systems, too, because the thing will have
launched up there, but no one will have used these systems. So,
if there's a problem with any of them, you want to know about
it before you send people up there to live there permanently.
So, a lot of our job will be to make sure that everything is in
order.
You're timelined to spend about five full days working
inside the station. How do you summarize the goals of what the
work is for you and your crewmates? What are some of the things
that you, yourself, are going to be doing during those days?
Well, the
big goal is to get the space station ready for the first permanent
crew, for Expedition 1. And that means we need to get all the
stuff ready, all the equipment on board that they need for them
to live up there. So, as I mentioned before, you know, all these
various systems. Another part, big part of what we'll be doing
is transferring cargo over there, and cargo would be food, spare
parts, other things that they need to finish the installation
of some of these systems and equipment for them to do their space
walks and so on. We will bring that up there and stage that up
there so that it's ready to go when they arrive, that they can
turn it into a fully-functioning space station in very short order.
You don't want to send them up there without these systems being
fairly close to ready to go.
And, if unless the situation has changed, you and Yuri
are going to be spending a good deal of your time outfitting
- putting equipment into place - in the Service Module. Now,
are you two going to be spending all of your time doing that,
or will you be joining your crewmates in helping move the supplies
and the logistics as well?
We'll be
doing a little bit of everything but the majority of my time and
Yuri's time will be spent installing things, although it becomes
kind of a group effort and, and in fact, also, it becomes…it's
not really a clear line between moving stuff over and installing
it. For instance, you know, if we're going to install a battery
unit, well, you've got to get that battery unit out of the shuttle,
you have to unbolt it over there, bring it on over, and you may
need to remove a bunch of panels and move other cargo to get it
out of the way to get into a section underneath the floor so,
that, that entire task is partially moving equipment and partially
installing equipment. And, the people who will be mostly in charge
of making sure that everything gets to the right place at the
right time will be Rick Mastracchio and Dan Burbank. Although,
Dan will also be spending a substantial amount of his time installing
equipment, also.
While you're doing that, in fact, you will all be moving
equipment. It'll be coming in from two different sides, both
from the SPACEHAB in the shuttle as well as the Progress ship.
And that's going to be a first for a shuttle flight.
And the
person who'll principally be doing that is Boris. Now, normally,
on board the Mir when they bring a Progress vessel up filled with
cargo, they spend maybe a week or two or even longer unloading
this, because they have the time. Now, we only have five days
to do this so we're going to have to get right in there and unbolt
and disconnect everything inside there that we need and get it
out of there because that Progress vehicle is going to have undock
automatically after we leave, and another one will be in its place
by the time the first expedition gets up there. So, we have to
get everything out of there that needs to get out of there and
then seal that up and get it ready to undock right after we leave.
On your first space flight you were the loadmaster in
charge of making sure things got out of the space shuttle and
onto space station Mir. That experience, are you finding, is
that paying dividends for you now as you get prepared for doing
this task?
Yeah. Well,
I'm not doing that job on this flight, but I've been able to tell
Rick and Dan a little bit about how we operated on those Shuttle/Mir
flights. Now the big difference here is that those Shuttle/Mir
flights were very much easier because you had a station crew up
there. All we had to do was get the stuff off the shuttle, and
you would hand it to a cosmonaut or ask him, "Where do you
want this?" And so, pretty much, you were only responsible
for half of it. On this flight we are the station crew also. So
we have to worry about not only how does it get off the shuttle,
but where does it go, and, even worse, how does that fit in with
the installation procedure, 'cause a lot of these spaces we're
going to be working in are, are rather small or cramped. And you
can't be moving large boxes through an area where somebody has
taken all the panels out and is in there installing some piece
of equipment. So, I think this flight is going to be a lot more
challenging in that respect than the Shuttle/Mir flights, because
the choreography is going to be a lot more critical.
With all of that done, it'll be time to close up the hatches
and for you all to leave the station. Again, can you describe
to us what's gonna happen on that day, the day of undocking
and flyaround, and tell us what you'll be doing?
OK. Well,
I'll be operating the computers in exactly the same way as we
did on rendezvous day, but on that day, Scott Altman will be doing
the flying. And what we're going to do is fly around the space
station, because we'll be the first flight to really get a good
look at the outside of the Service Module. And what Scott will
do is undock and fly the shuttle around. We're not exactly certain
how many times we're going to fly around, it depends a little
bit upon the amount of fuel that we have left and the, the lighting
conditions at the time, which depends upon the orbit at the time.
So right now, we're planning for two, uh, flights around the station.
And again, I'll be operating the computers to give Scott a view
of our relative position with respect to the station, which will
aid him in his flying of the orbiter around the space station.
And then, after that, we'll fire the jets and head off and come
down two days later.
The success of your mission is critical to establishing
this station as a permanent place where people from Earth can
live. The fact that you're willing to fly there and do the work
yourself would tell us that you believe it's something that's
important to be done. Finally, tell me why you think it's important
to establish this space station; what is it going to contribute
to us in the future?
Well, I
think it's an unbelievably important step because of the capability
it offers us. Right now, if we want to go further in space than
we're doing right now, if we want to eventually go to Mars or
out of low Earth orbit permanently, we need to know a bunch of
things, and a lot of the technology is not there yet. And if you
think about how you would test this technology or develop it on
the Earth, you can't really test things very well on Earth because
you don't have the weightless conditions, or the vacuum, as it
turns out. And for instance, what we do now is we send experiments
up on a shuttle; you get a week or so of data, you bring it back
down. That same experimenter, that same scientist or engineer,
will think about the data, make some changes, he might get to
fly his equipment again two years later…at which time he'll
get another six or seven days worth of data. It's very difficult
to make progress this way. If you think of how an engineer would
develop something in his lab here on the ground -- he works on
it every day, he's making changes every day. If you only let that
scientist into his laboratory once every two years for a week
period, progress is incredibly hard. So, what it allows you to
do is to have an engineer or a scientist or an astronaut running
an experiment, making changes and doing things real-time every
day, all the time. That's how you're going to make progress, and
I think that's how we're going to be able to develop some of the
systems which we need to go out to other planets and to move outwards.
|