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from NASA's Kennedy Space Center in

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Florida you're watching live coverage of

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the Parker Solar Probe mission to unlock

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mysteries of the sun's atmosphere good

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morning I'm NASA's Maureen Lewis thanks

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for waking up early this Sunday morning

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for our second launch attempt we have

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team coverage of today's launch from

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nasa's Torrey McClendon at a viewing

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area near the iconic Vehicle Assembly

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Building NASA edges franklin Fitzgerald

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and Blair Allen and NASA's Josh Finch

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and Mick Waltman at the mission director

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Center

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we'll have in-depth interviews on

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everything you need to know about Parker

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Solar Probe and how the weather is

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shaping up but first

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Parker Solar Probe is targeted to launch

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at 3:31 this morning Eastern Time from

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launch complex 37 at Cape Canaveral Air

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Force Station the launch window is 65

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minutes long Parker will take off on a

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United Launch Alliance Delta 4 heavy

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rocket speeding up to four hundred

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thirty thousand miles per hour in orbit

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that's fast enough to get from

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Philadelphia to Washington DC in just

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one second it will travel seven times

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closer to the Sun than any spacecraft

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before Parker will help us understand

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how the Sun affects weather in space so

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why is this space weather important

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first a little background

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Parker Solar Probe is named after dr.

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Eugene Parker a physicist who figured

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out 60 years ago that our star actually

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has its own wind and storms and they can

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spread far into space this space weather

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can disrupt communication signals from

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our satellites and even cause power

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outages on earth besides impacts here on

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the ground we also need to understand

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solar wind to help us explore deeper

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into space just as ocean explorers need

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to understand currents NASA needs to

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understand space weather to help us send

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astronauts to the moon Mars and other

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distant destinations scientists have

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sought answers about space weather for

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more than 60 years and will send Parker

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in to temperatures of 2,500 degrees

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Fahrenheit to find them coming up we'll

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find out how Parker will manage to get

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so close to our star without burning up

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but first we are now about 28 minutes

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from launch

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so let's check in with NASA's Josh Finch

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and Mick Waltman and Kennedy's mission

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director Center for an update hi guys

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good morning Murray I'm Joshua Finch and

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I'm here with Nick Waldman good morning

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Mick good morning Josh I'm happy to be

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here on behalf of NASA's launch services

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program and we're happy to have you this

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is our second launch attempt for NASA's

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Parker Solar Probe on the Delta 4 can

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you tell us a little bit about yesterday

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why we scrubbed in what happened right

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after that yeah absolutely a lot of

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works going on by the launch team since

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yesterday's launch attempt they've been

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working on a few things the gaseous

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helium bottle pressure limit that

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resulted in yesterday's morning scrub

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was evaluated by United Launch Alliance

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and the NASA launch teams for today's OP

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the teams will continue to monitor that

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limit however they did place in some new

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limits for the port and starboard common

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booster cores so they'll continue to

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watch that today after D tanking

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yesterday the team did perform

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inspections of the launch vehicle bond

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on foam insulation or bow fee due to the

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cold temperatures achieved during

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cryogenic tanking yesterday minor

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repairs were required in some of the

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interface areas they made those repairs

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verified them this morning they're ready

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to support today's launch tanking

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operations and then we began with moving

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the MST earlier today to get ready for

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launch early this morning and you can

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see that MST or mobile service tower

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standing behind the delta 4 heavy rocket

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on the screen the teams also just

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received a weather briefing from the US

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Air Force 45th Space Wing the launch

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weather officer for today's mission is

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looking into a whole host of weather

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related details such as wind speed cloud

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coverage and more and launch teams need

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to know this before committing to launch

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that report came back pretty great our

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probability of violation is now just 5%

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that means we are 95% go when's 6 knots

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out of the southwest the temperature is

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at about 78 degrees those concerns that

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we were initially looking at with the

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anvil clouds it doesn't look like any of

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them are going to drift into the launch

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area today so we are really good on

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cloud coverage for today so a good news

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story with the weather improving for us

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and Mick can you tell us a little bit

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about the Delta for heavy with the

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additional third stage that we're

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seeing on our screen now yeah absolutely

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Josh you know due to the extremely high

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energy required for this mission the

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delta 4 heavy launch vehicle was chosen

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by United Launch Alliance and NASA LSP

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the launch vehicle is unique in the fact

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that it has three first stage hydrogen

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fueled common booster cores

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each have an RS 68 a main engine to

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provide the initial thrust out of

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Earth's atmosphere on top of the center

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common booster core you have a delta

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cryogenic second stage with an RL 10 B

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engine which is used to achieve an

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intermediate escape orbit once in space

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on top of that we have a 63 foot 5 meter

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by sector composite fairing which

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protects Parker Solar Probe as it

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ascends through Earth's atmosphere on

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its way to space and inside the fairing

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along with the Parker Solar Probe

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spacecraft we have a third stage

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provided by Northrop Grumman innovation

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systems a solid rocket motor that is

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called the star 48 bv it's a Vectra

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Boulder that's used to put that final

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push to send Parker Solar Probe on its

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trajectory to the Sun all of these

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vehicle features play an important role

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in getting Parker Solar Probe on its way

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to touch the Sun this morning and again

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a live shot there of the delta 4 heavy

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rocket with the additional third stage

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at Space Launch Complex 37 and make

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we've been sitting here in the mission

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directors Center listening in to the

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launch teams can you give me an update

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on on what's happened so far in today's

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countdown yeah so far the teams have

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proceeded through the launch count

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launch conductor Scout Barney has

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orchestrated all launch steps with the

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launch teams to get the cryogenic

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loading done on first stage and second

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stage teams have finished that off and

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our maintaining and topping the stage is

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currently right now so a lot going on

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here as we move toward a liftoff at 3:31

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a.m. we are inside of a built-in hold at

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the moment but we'll continue to monitor

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the countdown here the mission directors

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Center