Dragon v2 unmanned test (SpX-DM1) - Falcon 9 (B1051) - Kennedy LC-39A - 02.03.2019, 07:49 UTC

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Jeff Foust‏ @jeff_foust 20 мин. назад

NASA's Bill Gerstenmaier says there's one issue to work from the FRR, regarding how the software operates on the Crew Dragon approaching the ISS. Also a dissenting opinion from an (unnamed) int'l partner.


Chris B - NSF‏ @NASASpaceflight 21 мин. назад

DM-1:

Gerst: "It's a test flight, but more than a test flight. Critical first step to the return of crew launch capability. Really impressed with the working relationship."

One Action Item: Software for abort. ISS partner dissented (Russia I bet).

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Chris B - NSF‏ @NASASpaceflight 2 мин. назад

Hans says there's a "dummy" flying on DM-1 - to measure the parameters of flight. #Starman2 Some ISS payload going up.

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Jeff Foust‏ @jeff_foust 9 мин. назад

Sounds like if Demo-1 doesn't launch on March 2, backup dates are March 5 and 8 or 9. Constrained by ensuring a 24-hour transit time to the station, and return in lighted conditions. After 8/9, a cutout because of upcoming Soyuz mission.

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Michael Baylor‏ @nextspaceflight 8 мин. назад

Gerst: Still working on COPV qualification for the crewed flights. Looking at the physics to find potential ignition sources. We are proving to ourselves that the problem no longer exists. #SpaceX

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Jeff Foust‏ @jeff_foust 7 мин. назад

Gerstenmaier: working some other issues on the vehicle, so it's not fully qualified, but know it's good enough to fly, and want to do so to find anything we missed.

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Chris B - NSF‏ @NASASpaceflight 7 мин. назад

Gerst says the Russians noted concerns about rendezvous abort software redundancy a few months ago. Gerst says he forgot to follow it up due to the shutdown, so will catch up with them next week to show why NASA's not worried about Dragon 2 accidentally colliding into the ISS.

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Chris B - NSF‏ @NASASpaceflight 2 мин. назад

And: spacecraft is not fully qualified as-is for crewed flights, there are items of concern (typical, not unexpected) in Draco thrusters FOD, capsule tankage particularly COPV, parachute envelope testing, and other subsystems. Gerst "guarantees" some things won't go as expected.

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Chris B - NSF‏ @NASASpaceflight 3 мин. назад

Kathy says SpaceX is contracted to fly crews on new boosters each time. Not flight proven boosters (at this time).

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Michael Baylor‏ @nextspaceflight 6 мин. назад

Confirmed: SpaceX Demo-1 will be the first Atlantic recovery of a Dragon capsule. Previously, recoveries have occurred on the west coast.

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Chris B - NSF‏ @NASASpaceflight 2 мин. назад

Launch Readiness Review (LRR) is February 27. Rollout to 39A on the 28th.

ARTICLE:
https://www.nasaspaceflight.com/2019/02/spacex-gains-frr-green-light-dm-1-iss/ ...

[Astro Cat]

tnt22 пишет:
Sounds like if Demo-1 doesn't launch on March 2, backup dates are March 5 and 8 or 9. Constrained by ensuring a 24-hour transit time to the station, and return in lighted conditions. After 8/9, a cutout because of upcoming Soyuz mission.

Опять откладывание! (((

[tnt22]

Astro Cat пишет:

tnt22 пишет:
Sounds like if Demo-1 doesn't launch on March 2, backup dates are March 5 and 8 or 9. Constrained by ensuring a 24-hour transit time to the station, and return in lighted conditions. After 8/9, a cutout because of upcoming Soyuz mission.

Опять откладывание! (((

В этом заявлении ключевое слово - if. Пока движуха на пуск 2-го марта (если техника не подведёт и погода не подгадит...)

[tnt22]

https://ria.ru/20190223/1551277767.html

Испытательный запуск новейшего корабля Crew Dragon к МКС пройдет 2 марта
02:30

ВАШИНГТОН, 23 фев – РИА Новости. НАСА по итогам предполетного анализа официально подтвердило проведение испытательного запуска новейшего корабля Crew Dragon к МКС 2 марта.

"Запуск состоится 2 марта в 02.48 (по времени Восточного побережья США)", - сказал представитель НАСА Билл Герстенмайер. Он отметил, что команда готова к запуску, который "будет не просто испытательный полетом, это критический первый шаг на пути к возвращению запуска экипажей на американскую землю".

В НАСА подчеркнули, запуск новейшего аппарата к МКС не представляет угрозы для экипажа, который находится на орбите.

Crew Dragon (Dragon 2) построен частной компанией SpaceX на базе грузового корабля Dragon. Первый испытательный полет пройдет в беспилотном режиме. По расчётам НАСА, в случае удачного запуска в субботу, 2 марта, корабль прибудет на МКС в воскресенье, 3 марта. Он будет оставаться на орбите до пятницы, 8 марта, после чего вернется на Землю. Crew Dragon, как и его грузовой аналог, является кораблем многоразового пользования.

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А этот беспилотный как будет стыковаться, автоматически или ловить манипулятором будут?
И можно ли "Драгон-2" в принципе поймать и пристыковать манипулятором, если что-то пойдет не так?

[zandr]

SpaceX Demo-1: Crew Dragon explained
SciNews
8:16
NASA and SpaceX are proceeding with plans to conduct the Demo-1 mission, SpaceX's first uncrewed test flight of the Crew Dragon spacecraft on a mission to the International Space Station, from the Launch Complex 39A (LC-39A) at NASA's Kennedy Space Center, Florida, on 2 March 2019, at UTC ( EST). On 22 February 2019, Kathy Lueders (Manager, NASA Commercial Crew Program) and Hans Koenigsmann (Vice President of Build and Flight Reliability, SpaceX) presented the objectives and the Crew Dragon spacecraft.

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NASA провела брифинг в центре имени Кеннеди по проверке готовности к полёту миссии DM-1 

Участвовали:
Уильям Герстенмайер, помощник директора, NASA Human Exploration and Operations;
Кэти Людерс, менеджер, NASA Commercial Crew Program;
Ганс Кенигсманн, вице-президент по безопасности и подготовки к полётам, SpaceX;
Кирк Ширеман, менеджер программы Международной космической станции;
Норм Найт, заместитель директора, NASA Johnson Space Center Flight Operations.

Основные тезисы брифинга: 

 Кенигсманн: Проверка готовности к полету является важной вехой. Мы провели её в той же комнате, где были сделаны все проверки готовности к полету Space Shuttle.

 Кенигсманн: после DM-1 этот Crew Dragon будет использоваться в In-flight Abort Test

 Шериман, NASA: Crew Dragon начнет доставлять грузы на МКС, начиная с CRS-21

 Кенигсманн: Crew Dragon в этой миссии идентичен кораблю, что будет использоваться в DM-2. Во время полёта в Crew Dragon будет манекен. Имя - неизвестно.

 Кенигсманн: Мы провели 17 испытаний парашютной системы.

 Шериман: В DM-1Crew Dragon будет стыковаться с адаптером IDA-2. Мы будем проверять адаптер до и после стыковки корабля.

 Найт: NASA и SpaceX готовились к этой миссии с июня прошлого года.

 Найт: Боб и Даг (астронавты DM-2) усердно тренируются, готовясь к полету.

 Шериман: Мы отправим в полёт радиационные мониторы и различные грузы для станции в этом полёте (DM-1).

 Герстенмайер: По части парашютов мы все еще находимся в процессе квалификационных оформлений. Там есть какая-то работа, которую нужно выполнить, но мы уверены, что с парашютной системой всё хорошо для этой миссии.

 Герстенмайер: Действительно интересно заниматься разработкой для полётов. Мы делаем вещи, которые действительно рискованны, и вещи, которые большинство людей не делают. Процесс проектирования пилотируемого корабля для полётов на ракете и отправка людей на МКС - это совсем не просто.

 Людерс: был уже 3 или 4 полёт с баллонами COPV 2.0, поэтому мы близки к их сертификации 

 Кенигсманн: Приводнение Crew Dragon будет в нескольких сотнях миль от побережья в Атлантическом океан и состоится 8 марта.

 Кенигсманн: Первая ступень сядет на OCISLY, а не на LZ-1 т.к. мы хотим полностью использовать возможности ракеты. И да, в трапе на LС-39A используется воздушное охлаждение.

 Людерс: Прямо сейчас только новые бустеры будут использоваться для миссий Crew Dragon. Однако это решение может быть изменено в будущем.

 Людерс: Предпусковая проверка назначена на среду, а выкатка ракеты с Сrew Dragon произойдет в четверг 

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https://spaceflightnow.com/2019/02/23/nasa-spacex-clear-crew-dragon-for-critical-march-2-test-flight/

NASA, SpaceX clear Crew Dragon for critical March 2 test flight
February 23, 2019 | William Harwood

STORY WRITTEN FOR CBS NEWS & USED WITH PERMISSION


The Crew Dragon spacecraft and Falcon 9 rocket assigned to the Demo-1 mission inside SpaceX's hangar at pad 39A on Dec. 18. 2018. Credit: SpaceX

NASA managers held a flight readiness review Friday and cleared SpaceX to press ahead with work to ready a Falcon 9 rocket and Crew Dragon commercial ferry ship for launch March 2 on an unpiloted test flight to the International Space Station.

The long-awaited mission is a critical milestone in NASA's $6.8 billion Commercial Crew Program, intended to end the agency's sole reliance on Russian Soyuz spacecraft to ferry U.S. and partner astronauts to and fr om the station in the wake of the space shuttle's retirement eight years ago.

If all goes well, two NASA astronauts hope to take off aboard a Crew Dragon spacecraft on the first piloted test flight in July.

"It's more than a test flight, it's really a mission to the International Space Station, it's part of the Commercial Crew Program that really gets us ready for the ... crew flight that comes up later," Bill Gerstenmaier, director of space flight operations at NASA Headquarters, said of the unpiloted test flight.

"So this is an absolutely critical first step that we do as we move towards eventually returning crew launch capability back here to the U.S."

Liftoff fr om historic pad 39A is targeted for 2:49:03 a.m. EST a week from Saturday, at roughly the moment Earth's rotation carries the rocket into the plane of the space station's orbit. That's the only way current rockets can rendezvous with an orbital target moving at nearly five miles per second.

Backup launch opportunities are available on March 5 and March 9, but after that, NASA would have to stand down until after a Russian Soyuz flight scheduled for launch March 14 to ferry cosmonaut Alexey Ovchinin, NASA flight engineers Nick Hague and Christina Koch to the station.

Ovchinin and Hague suffered a dramatic Soyuz booster malfunction during their initial climb to space last October, but the capsule and crew landed safety about 250 miles from the launch site in Kazakhstan. The Russian space agency corrected the problem, revised the launch schedule and Koch, already in training for a downstream flight, was added to the mission.

In any case, NASA managers attending the FRR Friday at the Kennedy Space Center reviewed launch processing to date and the status of remaining "open" items that either must be resolved or waived before flight and those that can be deferred in the near term.

Among the topics under discussion were the Crew Dragon's parachute system and testing to certify it for use in the upcoming piloted mission, temperature-related issues with the capsule's maneuvering thrusters and the status of redesigned high-pressure helium tanks, known as COPVs, that are submerged in super-cold liquid oxygen inside the Falcon 9 rocket.

Trouble with an earlier version of the tank was blamed for a spectacular on-pad Falcon 9 explosion in 2016. The helium pressurization system also was implicated in an in-flight breakup in 2015 when a strut holding a tank in place failed, triggering the destruction of a station-bound Dragon cargo ship.

The issue for the Crew Dragon mission is understanding the physics that led to the on-pad explosion and making sure the redesigned tanks, known as COPV version 2.0, are not vulnerable to the same failure mode.

"One of the things the composite overwrap pressure vessel has (are) fibers that are twisted together," Gerstenmaier said. "As those pressurize, they can break, and as they break they can potentially generate heat, if they can generate enough heat in the oxygen environment they can be an ignition source.

"So now we're going back and we're proving to ourselves that this breaking is so unlikely it's not going to be a concern."

One issue that needs to be resolved in the near term involves Russian concerns about the computer guidance and safety systems aboard the Crew Dragon that will control the spacecraft's final approach to the space station.

Gerstenmaier said European, Japanese and Russian spacecraft that rendezvous with the station typically carry independent systems that can abort an approach in the event of a massive computer failure that might leave a ship on a collision course with the lab. The Crew Dragon relies instead on redundancy in the primary computer system.

"One of the actions I assigned was to go look a little more rigorously at some of the fault detection and response to various failures to make sure the computers do all the right things, that we don't get in a situation wh ere essentially the vehicle goes dead or dormant and then just continues its approach and collides with station," Gerstenmaier said.

"That's the basic concern the Russians brought up, why isn't there a separate system or separate box to go provide this backup capability? We think we have sufficient rationale for that."


Bill Gerstenmaier, head of NASA's human exploration and operations directorate, speaks with reporters Friday at the Kennedy Space Center in Florida. Credit: NASA/Chris Swanson

Gerstenmaier said such technical issues are not unusual in the development of human-rated spacecraft and going into the Demo 1 mission, "we haven't set the total envelope of wh ere some of the hardware can operate and how it can be used" during piloted flights.

"But we know the hardware is good enough to go do this demonstration flight," he said. "In fact, we want it to go to flight to see if there's something else we've missed, and we fully expect to learn some things on this fight."

Assuming the Demo 1 takes off March 2 as now planned, the Crew Dragon spacecraft will carry out an autonomous rendezvous, catching up with the space station the day after launch and moving in for docking at the lab's forward port, the same one once used by visiting space shuttles, around 6 a.m. on March 3.

The station's crew — Russian commander Oleg Kononenko, Canadian physician-astronaut David Saint-Jacques and NASA flight engineer Anne McClain — will open hatches and inspect the new spacecraft a few hours after docking.

The flight plan calls for the Demo 1 Crew Dragon to undock on March 8 and return to an Atlantic Ocean splashdown about 230 miles east of Cape Canaveral. SpaceX recovery crews stationed nearby will pull the capsule onto a ship and haul it back to Port Canaveral for detailed post-flight inspections.

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Assuming no major problems develop — and assuming an in-flight abort test goes well this spring — astronauts Robert Behnken and Douglas Hurley hope to blast off in a Crew Dragon this summer to kick off the first launch of U.S. astronauts aboard an American-made rocket from U.S. soil since the shuttle program ended in July 2011.

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NASA also is funding development of a Boeing capsule known as the CST-100 Starliner that is scheduled for an unpiloted launch atop a United Launch Alliance Atlas 5 rocket later this spring. The first piloted Starliner flight, carrying Boeing astronaut Christopher Ferguson and NASA crewmates Nicole Mann and Mike Fincke, is planned for the fall timeframe.

If those flights go well, operational U.S. crew rotation flights could begin before the end of the year.

The final currently contracted U.S. Soyuz flight is scheduled for launch in July. Given the ever-present possibility of unexpected problems with the commercial crew ships, NASA is studying an option of purchasing two additional Soyuz seats, one for use in the fall and the other next spring.

SpaceX currently holds NASA contracts valued at $3.04 billion for 20 space station resupply flights and another contract for an unspecified amount for at least six additional flights through 2024.

SpaceX also holds a $2.6 billion NASA contract to build and launch a piloted version of its Dragon cargo capsule. Boeing won a $4.2 billion contract to build the CST-100.

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[tnt22]

Предварительный прогноз погоды на день пуска

https://www.patrick.af.mil/Portals/14/documents/Weather/24FEB19.pdf?ver=2019-02-24-071129-767

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