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the cygnus cargo ship now attached to

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the earth-facing side of the

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international space station's harmony

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module is due to be removed from that

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spot and sent on its way next week

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wrapping up a mission that delivered

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over 7 500 pounds of cargo and small

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satellites when it arrived in late march

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this ship will not only be hauling

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things off no longer needed on the

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station it will also host some science

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on its way down to a destructive

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re-entry into the atmosphere joining us

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this morning to talk about

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some of those things coming up is holly

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vavren the international space station

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uh program's flight lead of the cygnus

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mission thank you holly for being here

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happy to be here

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all right so tell me um would you say

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this mission has gone pretty much

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according to plan so far it's been

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essentially flawless all of the cygnus

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subsystems have performed not performed

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nominally this is the second flight of

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the enhanced

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cygnus spacecraft

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and so with the changes that have been

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made incrementally over time it just

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really proves how reliable the

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spacecraft design is where we're really

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happy with the performance so it's going

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to be taking about uh 4 400 pounds of of

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trash and other things away from station

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what kinds of trash is it going to be

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taking away well as you mentioned

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earlier cygnus undergoes a destructive

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reentry that means it burns up in the

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atmosphere and so that's a really

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effective way of getting rid of trash

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and broken or obsolete hardware that we

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no longer need on station and so we've

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got as i mentioned some some hardware

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broken hardware

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obsolete hardware

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we have dirty laundry

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food canisters and of course smelly

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waste items

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so we're basically a big garbage truck

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but it's a very important aspect to

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supporting station operations it's

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better than keeping it on the station

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absolutely for six months so on its way

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down is not only carrying trash is

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carrying some experiments it's going to

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be deploying some satellites and play

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host to what's described as i guess a

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large fire so tell me about these events

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and how you're going to get the data

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from the fire experiment sapphire okay

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so on tuesday the 14th uh cygnus will

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depart

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from space station and about four hours

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after departure will begin the sapphire

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operations that is the spacecraft fire

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experiment that is run out of the glenn

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research center

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and so the goal is to understand how

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fire propagates without the effects of

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gravity so we're going to answer

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questions like how large does a fire get

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how fast does it spread

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and this information will help us

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improve future spacecraft designs

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especially for long duration missions

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there have been previous combustion

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experiments performed in space and on on

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the space station but those experiments

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have been limited to samples that are

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four inches square or less so an

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unmanned cargo craft lake cygnus is

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ideal for large large-scale combustion

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experiments without posing any risk to

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iss or crew

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so in cygnus there's a one foot by three

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foot

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material sample it's a cotton fiberglass

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blend

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located inside a specially built

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enclosure that's inside the pressurized

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section of cygnus

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and so after departure the orbital atk

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flight controllers from their dulles

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facility dulles virginia facility will

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remotely ignite the sample

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we're going to get a lot of data

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from sensors that are placed throughout

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the vehicle and

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high def video that's what we're most

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excited to see how the fire behaves in

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space that'll be downlinked via ground

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station over the next few days

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so researchers can study it

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awesome

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in addition there will be some cubesat

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deployments this is the first use of the

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nanoracks cubesat deployer to deploy

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small satellites from cygnus

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historically we've used the japanese

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airlock on station to deploy satellites

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but now we have the ability to

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deploy from a free-flying vehicle so

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there are five spire lemur satellites on

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this vehicle they've got technology

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demonstrations and maritime and weather

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observation platforms and those will be

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deployed on wednesday morning and those

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cubes has the weather operations for uh

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ships and boats yes monitoring yes

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excellent so those are the two

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experiments we have uh the sapphire we

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have some of the cubesats we also have

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the rebirth the destructive re-entry is

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going to be uh it's going to be looking

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at some of that that data

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so tell me what would be measured and

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what's the value of knowing the

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specifics of how the vehicle is

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destroyed on re-entry okay so on june

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22nd cygnus will begin its fiery demise

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and so the re-entry breakup recorder is

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a payload that was designed by the

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aerospace corporation and flown under

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the direction of the dod space test

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program and that payload will record

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temperature and acoustic measurements

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from inside the spacecraft

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this data is collected sent to a mother

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unit also inside the vehicle and then as

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the cygnus vehicle is breaking up

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the

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reeber unit makes a satellite phone call

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through the iridium network to transmit

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that data to researchers on the ground

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and the data that we're obtaining is

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really crucial to understanding how

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spacecraft

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behave during re-entry and this will

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allow us to improve future spacecraft

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designs

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excellent so we have all these

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experiments and then it departs on june

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14th and then begins its destructive

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re-entry eight days later on june 22nd

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after that are there more cygnus cargo

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ships on the agenda for this year

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absolutely teams are busy

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the oa5 mission is coming up that'll be

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the antares launch vehicle return to

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flight uh orbital atk recently completed

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a very important milestone leading up to

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that to that launch it was a hot fire

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test of the first stage got a picture up

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looks like

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of how that went very successful

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specialists will be reviewing data over

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the next couple of weeks

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but in the meantime the cygnus vehicle

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for the oa5 mission is at the launch

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site and we're very much looking forward

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to launching from the wallops flight

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facility in addition there's another

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orbital atk mission planned for later

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this year called oa7 and preparation is

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underway for that mission as well plenty

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of cargo going up and down we're very

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excited for the return to flight and all

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uh holly thank you for being with us

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today again the on on june 14th the

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cygnus cargo vehicle is going to be

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departing uh from the station and we'll

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be providing some nasa tv coverage uh

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starting at eight am central time uh

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eighth and uh it'll depart at uh 8 30

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a.m central time so again holly thanks

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for being with us today my pleasure