Solar Probe Plus (Parker Solar Probe) – Delta IV H/Star-48BV – Canaveral SLC-37B – 12.08.2018 в 07:31 UTC

[tnt22]

Chris B - NSF‏ @NASASpaceflight 36 сек. назад

HOLD HOLD HOLD!!

[tnt22]

0826 UTC (4:26 a.m. EDT)

HOLD. Countdown has stopped at T-minus 1 minute 55 seconds due to a problem.

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 2 мин. назад

We are scrubbed for the day and resetting for a 24-hour recycle. #DeltaIV #SolarProbe

[tnt22]

0829 UTC (4:29 a.m. EDT)

This is Delta Launch Control. It has been confirmed that we will not continue with the Delta IV Parker Solar Probe launch activities this morning. We will have a 24-hour recycle, so our next launch attempt will be tomorrow.

[tnt22]

Chris B - NSF‏ @NASASpaceflight 2 мин. назад

SCRUB. Got to do this right. Always the correct move if everything's not right.

[tnt22]

08/11/2018 11:30 Stephen Clark

The ULA launch team is setting up for another attempt to send the Delta 4-Heavy skyward with Parker Solar Probe on Sunday. The launch window tomorrow opens at 3:31 a.m. EDT (0731 GMT).

[tnt22]

08/11/2018 11:33 Stephen Clark

The launch team will drain the Delta 4-Heavy's cryogenic propellant tanks in the coming hours in preparation for another launch attempt Sunday.

[tnt22]

С нами попрощались до завтра

[Not]

Наддув бахнул, до срабатывания аварийных клапанов.

[tnt22]

Jonathan McDowell‏Подлинная учетная запись @planet4589 19 мин. назад

Hold at T-1min55s - issue with a helium regulator?

Chris B - NSF‏ @NASASpaceflight 10 мин. назад

NSF folk with great ears all believe they heard a helium regulator issue as the cause of the HOLD HOLD HOLD and ultimately running out of available window causing the launch to scrub.

[tnt22]

Chris G - NSF‏ @ChrisG_NSF 8 мин. назад

The cause of the scrub was a Gaseous Helium Red Pressure alarm. Next attempt No Earlier Than tomorrow, Sunday, @ 03:29 EDT (0729 UTC). BUT teams need to look @ issue & make sure they can do 24hr turnaround.
#ParkerSolarProbe #NASA #DeltaIVHeavy @ulalaunch

[tnt22]

08/11/2018 11:51 Stephen Clark

The Delta 4-Heavy's countdown was halted at T-minus 1 minute, 55 seconds, as a member of the launch team announced a gaseous helium regulator alarm. No further details on the nature of the issue have been released at this time.

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 32 мин. назад

#DeltaIV Parker #SolarProbe launch is planned for Sunday, Aug. 12, from Space Launch Complex-37 at Cape Canaveral Air Force Station. The forecast shows a 60 percent chance of favorable weather conditions for launch. The launch time is 3:31 a.m. ET.
http://bit.ly/div_solarprobe 

[tnt22]

Delta IV Heavy aborted launch with NASA's Parker Solar Probe

SciNews

Опубликовано: 11 авг. 2018 г.

(2:16)

[tnt22]

Прогноз погоды на 2018-08-12

Delta IV PSP L-1 Launch Forecast

60% GO

[tnt22]

NASA's Parker Solar Probe Ready for Launch Atop Delta IV Heavy

NASAKennedy

Опубликовано: 11 авг. 2018 г.

(4:17)

Parker Solar Probe Launch Postponed

NASAKennedy

Опубликовано: 11 авг. 2018 г.

(1:50)

[tnt22]

Tory Bruno‏Подлинная учетная запись @torybruno 15 мин. назад

Bird still looks good. Operations paused at the moment for stage 2 lightning. One darn cloud parked over the pad. Everybody face east and blow...

[tnt22]

https://spaceflightnow.com/2018/08/11/launch-of-solar-probe-scrubbed-by-technical-issue-in-terminal-countdown/

Launch of solar probe scrubbed by technical issue in terminal countdown
August 11, 2018 | Stephen Clark


Credit: NASA/Spaceflight Now

An automatic alarm in the final two minutes of the Delta 4-Heavy rocket's countdown early Saturday forced officials to delay blastoff with NASA's Parker Solar Probe by 24 hours.

NASA and United Launch Alliance — the builder of the Delta 4-Heavy — rescheduled the launch of the $1.5 billion solar probe for 3:31 a.m. EDT (0731 GMT) Sunday, at the opening of a 65-minute window.

Officials hope to dodge anvil clouds that could blow over the Cape Canaveral spaceport fr om offshore thunderstorms during Sunday's early morning launch window. The official launch weather forecast fr om the U.S. Air Force's 45th Weather Squadron predicts a 60 percent probability of acceptable conditions for launch Sunday.

Scattered thunderstorms are forecast to move through Central Florida from the west Saturday afternoon, but the weather should improve in the evening hours.

Спойлер

"Storms should move offshore and dissipate before the Mobile Service Tower roll operations, and weather will improve in the overnight hours," the Air Force weather team wrote in a launch forecast issued early Saturday. "Closer to the launch window, thunderstorms will likely continue over the Gulf Stream offshore, and east upper-level winds could cause anvils from offshore thunderstorms to migrate toward the Space Coast."

NASA and ULA officials intended to launch Parker Solar Probe on Saturday, but a series of unspecified technical issues — capped by an alarm at T-minus 1 minute, 55 seconds — kept the 233-foot-tall (71-meter) Delta 4-Heavy rocket on the ground.

A problem early in the countdown caused a 20-minute delay from Saturday's original launch time of 3:33 a.m. EDT (0733 GMT), then a data stream issue further delayed the Delta 4-Heavy's takeoff time to 4:28 a.m. EDT (0828 GMT).

The countdown picked up from a hold at T-minus 4 minutes, but a member of the launch team announced a gaseous helium regulator alarm at T-minus 1 minute, 55 seconds. There was not enough time remaining in the launch window Saturday to resolve the alarm, so launch managers declared a scrub for the day.

In a brief statement, ULA said the launch was scrubbed "due to a violation of a launch lim it, resulting in a hold."

No other information about the gaseous helium system alarm, or the other technical concerns during the countdown, were released by NASA or ULA.

Parker Solar Probe has until Aug. 23 to depart Earth and kick off a seven-year mission to fly through the sun's atmosphere, making 24 orbits through the inner solar system and using the gravity of Venus to nudge ever-closer to our star. The compact, automated space probe will reach an orbit passing as close as 3.83 million miles (6.16 million kilometers) from the sun in 2024.

The spacecraft carries instrumentation to measure the environment in the sun's corona, the super-heated halo of plasma extending out from the solar surface, wh ere temperatures reach millions of degrees. Scientists designed the mission to probe the corona for the first time, and study how the solar wind is generated and accelerated into the solar system.

Parker Solar Probe will set records as the closest spacecraft to fly to the sun, and it will become the fastest human-made object in history, reaching a speed of roughly 430,000 mph — 120 miles per second or nearly 700,000 kilometers per hour — during its final perihelion passages in the mid-2020s.

If the mission has not launched by Aug. 23, the liftoff will be delayed to May 2019, the next opportunity to take advantage of an alignment in the orbits of Earth and Venus to make the journey to the sun possible.

[свернуть]

[tnt22]

2150 UTC (5:50 p.m. EDT)

This is Delta Launch Control from the Delta Operations Center at Cape Canaveral Air Force Station in Florida as we begin a second launch attempt for the Delta IV Heavy rocket carrying NASA's Parker Solar Probe.

The Air Force weather officer on duty at the 45th Weather Squadron just provided a briefing to senior management on conditions expected during retraction of the launch pad's mobile service gantry and the forecast for the rest of the evening.

Overall, weather looks favorable for rolling the tower to its launch position. Typical summertime thunderstorms around Central Florida are being monitored, but skies at the Cape are clear right now. One final weather check will be made before the actual move begins.

The tower was returned to its position shielding the rocket following this morning's scrub and de-fueling operations. Now, we're getting ready to retract the tower for tonight's countdown.

[tnt22]

2220 UTC (6:20 p.m. EDT)

The ULA launch director has given approval for MST roll.