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both lr 0 and L cross need a successful

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launch in order to begin their missions

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our next guest is an integral part in

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getting these spacecraft and many others

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off the ground chuck Tatro is a mission

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manager in NASA's launch services

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program at Kennedy Space Center he's

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going to tell us about the unique

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challenges of this two for one launch

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hello my name is Chuck Tetreau and I'm a

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mission manager for NASA's launch

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services program at Kennedy Space Center

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we're at the vertical integration

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facility on Cape Canaveral Air Force

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Station this is where we will assemble

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the Atlas 5 rocket that will send the LR

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0 and L cross spacecraft on their

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journey to the moon as a mission manager

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my job is to lead the effort to bring a

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new spacecraft and launch vehicle

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together to where they're ready to

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launch about three months before launch

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the spacecraft and the launch vehicle

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components arrive at the launch site for

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final testing about two months before

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launch this rocket components are

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erected on the mobile launch platform

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and filled with cryogenic fluids for a

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wet dress rehearsal about two weeks

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before launch the spacecraft is brought

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out here to the vertical integration

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facility and stacked on the rocket at

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about one week before launch we do a

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launch countdown rehearsal so the team

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can practice for countdown in a dual

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payload flow both spacecraft have their

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own intricate and an intimate

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requirements that are separate and may

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not play together nicely with the other

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spacecraft for example contamination

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orbital requirements because l cross is

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going to impact the moon and LRO is

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going to go in orbit around the moon we

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need to make sure that one doesn't

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the first challenge on this mission is

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the fact that the centaur second stage

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will remain attached to the L cross

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spacecraft after it does its normal job

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of delivering LR 0 and L cross on their

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journey to the moon l cross then will

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command the Centaur stage for an impact

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into the lunar surface the second

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challenge is that the orbit requirements

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for each spacecraft are complex this

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narrows the daily launch window that we

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have to launch this mission the third

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challenge is that this is NASA's first

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step in our return to the moon so

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there's a lot of public awareness and

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increased interest in this mission we

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want to make sure that this mission is

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launched safely and successfully that's

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our show to our guests Cathy Peddie dr.

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Kimberly in ago when Chuck Tatro thanks

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for giving us an insider's view of these

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two missions we also thank all of you

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for joining us for today's webcast be

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sure to join us on launch day for the

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liftoff of the Atlas 5 rocket carrying a

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lunar reconnaissance orbiter and the

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lunar crater observation and sensing

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satellite you can follow the countdown

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on NASA TV and on each missions website

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at WWDC gov / LRO and ww NSA gov / L

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cross from Kennedy Space Center in