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the science instruments can't function

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all by themselves they get plugged into

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the hubble space telescope and there's

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an entire infrastructure in there that

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enables them to do the great science

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that they do

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and has to work properly in order for

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any of these instruments to get their

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science down to the ground we have the

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opportunity on these servicing missions

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not just to upgrade the instruments but

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also to upgrade that infrastructure

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hubble has six giant arrows in total

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and over time they wear out

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we're down to three working gyros but

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we're only using two we're keeping one

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in spare

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and in the next servicing mission we're

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going to replace all the gyros that we

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have full gyro capability for years to

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come

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well we have six gyros and what we do is

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we package two of them into a box with a

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handle

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it's not an easy test to replace these

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these rate sensor units these three

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boxes the star trackers have these long

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tubes on them called sun shades so when

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the astronauts have to replace the gyros

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they have to sort of wedge themselves

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into this very small area without

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gyros help us in two ways when we move

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from target to target the gyros help the

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computer know how quickly we're turning

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once we get locked in on a target those

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gyros help us steady the vehicle so that

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we can collect all that scientific data

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we're going to put in a new fine

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guidance sensor

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to take the place of one that has shown

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evidence of

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failing and not not being long for this

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world

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well defined guidance sensors actually

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are the components that find the

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particular observation and they pick two

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guide stars very close to what is being

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observed and fine guidance sensors then

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zero in on those guide stars they lock

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in on them and now you know you're

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pointing in the right place in the sky

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and then it transfers over to the rate

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sensor units the gyroscopes to hold

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when you're working with the hubble

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space telescope program anything can

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happen and in fact just a few weeks

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before we were scheduled to launch back

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in october

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the data handling system the sic and dh

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went down

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the sic date it is critical to the

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hubble space telescope because without

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it you have no telescope you have no

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science information nasa administration

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decided that it would be worth it to

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postpone the servicing mission so that

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we could get the flight spare

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and test and verify it and replace it on

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the servicing mission the sic dh

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function is to take the data from the

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science instruments and

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it formats it

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it puts it in a command sequence that is

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then transmitted to the ground and then

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deciphered back on the ground

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without it you have no science

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information and by putting a

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new

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sic day check up there you gain the

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redundancy back and you're not one

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the soft capture mechanism is a device

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that we're putting on the bottom of the

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telescope

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we're going to convert hubble from a

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shuttle interface which grabs with some

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last three latches on the bottom of

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hubble

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to an exploration interface because

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we're using a similar interface that our

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exploration program is using for the

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orion capsule

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so in five minutes we'll convert from a

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shuttle-based

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architecture to an exploration-based

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architecture for hubble that will enable

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sometime in the future for us to dock

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another spacecraft not the space shuttle

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to the hubble

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for the purpose of making sure that at

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some point at its end of life

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the batteries we're operating on are the

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original batteries that were launched

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with the observatory in 1990

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the design life span was five years

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so these batteries are operating well

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past

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what they were designed for

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it's time to change them out we are

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losing capacity

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we're installing six new batteries

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arranged in two modules of three packs

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we're going to install a new outer

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blanket layer called a noble which is a

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solid it's not a blanket anymore it's a

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solid sheet

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we designed a new outer blanket layer

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that can either lay on top of the

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degraded blankets just cover them up or

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we will take off the blanket in order to

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install a new radiator against the bay

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door and this is a very

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weather resistant new outer blanket

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layer that we have designed so it should

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not degrade

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appreciably for the next

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15-20 years

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so at the end of this servicing mission

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where we've installed new cameras and

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upgraded all of this infrastructure

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the whole point of this is that the

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hubble space telescope will be better

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than it's ever been in its history and

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will continue to produce this this