SpaceX Starlink flight 1 - Falcon 9-072 (B1048.4) - CCAFS SLC-40 - 24.05.2019, 02:30 UTC

Автор tnt22, 07.05.2019 23:49:41

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tnt22

ЦитироватьMichael Baylor‏ @nextspaceflight 1 мин. назад

Elon: The initial constellation will not have inter-satellite links, but we will instead do a ground bounce off of gateways on the ground to connect satellites. May need ship based gateways in some places but can get global coverage with mostly ground based.

tnt22

ЦитироватьMichael Baylor‏ @nextspaceflight 1 мин. назад

If things go according to plan, #SpaceX will have more satellites than anyone else combined in two to three years. This will take around 30 launches or 18,000 satellites.

tnt22

ЦитироватьStephen Clark‏ @StephenClark1 4 мин. назад

Musk says it will take "on the order of 1,000 satellites" to make the Starlink system economically viable.

tnt22

ЦитироватьChris G - NSF‏ @ChrisG_NSF 4 мин. назад

#Starlinks expected to become redundant after about 5 years and are replaced with newer generation satellites.

tnt22

ЦитироватьChris G - NSF‏ @ChrisG_NSF 7 мин. назад

Each Starlink costs more to launch than it does to make, even with the flgiht-proven Falcon 9. #Starship would decrease launch costs of Starlink by at least a factor of 5.

tnt22

ЦитироватьChris G - NSF‏ @ChrisG_NSF 6 мин. назад

Elon states SpaceX would never refuse to launch competitor space-based internet satellites. "Competition is good."

tnt22

ЦитироватьSpaceX‏Подлинная учетная запись @SpaceX 1 мин. назад

All systems and weather are go ahead of tonight's launch of Starlink; webcast will go live about 15 minutes before liftoff → http://spacex.com/webcast 

tnt22


tnt22

ЦитироватьSpaceflight Now‏ @SpaceflightNow 4 мин. назад

T-minus 1 hour, 45 minutes. With nightfall upon us on Florida's Space Coast, a Falcon 9 rocket stands vertical at pad 40 counting down to liftoff at 10:30pm EDT (0230 GMT) with the first 60 satellites for SpaceX's planned Starlink broadband constellation.
https://spaceflightnow.com/2019/05/15/falcon-9-starlink-1-mission-status-center/ ...


tnt22

Цитировать05/16/2019 03:47 Stephen Clark

T-minus 1 hour, 43 minutes. Good evening from the Kennedy Space Center, a short distance away from the Falcon 9's launch pad at neighboring Cape Canaveral Air Force Station.

SpaceX says all systems and weather are "go" for liftoff tonight at 10:30 p.m. EDT (0230 GMT), the opening of a 90-minute launch window to place the first batch of 60 satellites into orbit for the company's planned Starlink broadband network.

Over the next hour or so, SpaceX's launch team will complete final checkouts of the rocket ahead of the start of fueling of the Falcon 9 with super-chilled, densified RP-1 kerosene and liquid oxygen propellants.

SpaceX's launch conductor will verify all members of the launch team are ready to proceed with the final 35-minute automated countdown sequence at 9:52 p.m. EDT (0152 GMT), followed by the start of filling the rocket with super-chilled, densified RP-1 kerosene and liquid oxygen propellants at 9:55 p.m. EDT (0155 GMT).

Liquid oxygen loading into the second stage will begin at T-minus 16 minutes, at 10:14 p.m. EDT (0214 GMT), followed by final chilldown of the rocket's nine Merlin first stage engines, a final pre-flight engine steering check, switching of the rocket to internal power, and pressurization of the Falcon 9's propellant tanks leading up to liftoff.

tnt22

Цитировать05/16/2019 03:59 Stephen Clark

SpaceX founder and CEO Elon Musk spoke with reporters a short time ago to discuss tonight's launch, and the company's future plans for the Starlink system.

"This is one of the hardest engineering projects I've ever seen done, and it's been executed really well," Musk said. "There is a lot of new technology here, and it's possible that some of these satellites may not work, and in fact a small possibility that all the satellites will not work.

"We don't want to count anything until it's hatched, but these are, I think, a great design and we've done everything we can to maximize the probability of success," he said.

Past initiatives to create an expansive communications satellite network in low Earth orbit, a regime a few hundred miles above Earth, have met technical and financial headwinds. Traditional communications satellites fly in higher geostationary orbits more than 22,000 miles the equator, with a single spacecraft covering a wide geographic region.

In lower orbits, the Starlink satellites will bounce signals fr om user-to-user via an intricate web of radio connections through ground stations, and eventually through inter-satellite laser cross-links.

"The goal of the Starlink system is to provide high bandwidth, low latency connectivity, ideally throughout the world provided we get regulatory approval, and this would provide connectivity to people that don't have any connectivity today, or wh ere it's extremely expensive and unreliable as well as providing options for people who may have connectivity today in developed areas of the world but it's very expensive," Musk said. "This will provide a competitive option for them.

"There's a lot of fundamental goodness about Starlink," he said. "We just want to make sure the appropriate caveats are there. There's a lot of technology, this is very hard, and quite frankly in the past, the success of low-Earth orbit communications constellations, I believe none have successfully gone into operation without going bankrupt."

SpaceX has secured regulatory approval from the Federal Communications Commission for nearly 12,000 Starlink satellites broadcasting in Ku-band, Ka-band and V-band frequencies. But the early focus is on launching hundreds of the satellites, each weighing about 500 pounds (227 kilograms) to establish a network that covers most of the world's population.

"It's important to distinguish between initial operational capability, which is around the 400-satellite level, and then significant operational capability is around satellite level, and thereafter, it's about adding more and more satellites and more orbital planes of satellites as we get more usage of the system and we get bandwidth constrained," Musk said. "One does not need anywhere near 10,000 satellites to be effective. ... We'll start selling service initial around the 400th satellite launch and then make sure our production and launch of satellites stays ahead of user demand."

After tonight's launch, SpaceX plans between two and six additional Starlink missions later this year to begin building out the network in orbit 341 miles (550 kilometers) above Earth, according to Gwynne Shotwell, SpaceX's president and chief operating officer.

"This next batch of satellites will really be a demonstration set for us to see the deployment scheme and start pulling our network together," Shotwell said at an industry conference last week.

tnt22

ЦитироватьElon Musk‏Подлинная учетная запись @elonmusk 8 мин. назад

Starlink mission will be heaviest @SpaceX payload ever at 18.5 tons. If all goes well, each launch of 60 satellites will generate more power than Space Station & deliver 1 terabit of bandwidth to Earth.

tnt22

Цитировать05/16/2019 04:37 Stephen Clark

T-minus 53 minutes. The 60 Starlink satellites packed aboard the Falcon 9 rocket will begin deploying fr om the launcher's upper stage around 62 minutes after liftoff, while flying in daylight over Tasmania.

SpaceX's webcast will show the deployment sequence.

"It will be a little bit different looking deployment than people are used to," Musk told reporters earlier this evening. "It's going to be a very slow deployment wh ere we rotate the stage, and each of the satellites on the stack has a slightly different amount of rotational inertia.

"So there's not actually a spring-based or specific deployment mechanism per satellite," he said. The satellites will kind of be deployed, it's almost like spreading a deck of cards on a table. This will be kind of weird compared to normal satellite deployments."

Multi-payload dispensers launched atop rockets typically release satellites in pairs, or one at a time, with a physical separation mechanism, such as a spring or pyrotechnic bolts.

"There actually may be a small amount of contact between the satellites, but it's very, very slow, and the satellites are designed to handle it," Musk said. "But we wanted to avoid having 60 different deployment mechanisms for the satellites. We expect them to turn on shortly after deployment. They'll start warming up the ion drive and go through a bunch of health checks.

"We should know if they're in good shape probably about two or three hours after deployment, so three or four hours after launch," he said.


tnt22

ЦитироватьSpaceflight Now‏ @SpaceflightNow 2 мин. назад

NEW LAUNCH TIME. SpaceX is now targeting 11pm EDT (0300 GMT) for the launch of a Falcon 9 rocket from Cape Canaveral with 60 Starlink satellites.

tnt22


tnt22

Возможно, о5 сильный ветер...
ЦитироватьChris B - NSF‏ @NASASpaceflight 2 мин. назад

So it's likely @upperlevelwinds. Everyone frown at that parody account.

tnt22

Цитировать05/16/2019 05:19 Stephen Clark

The SpaceX launch team is currently being electronically polled for a "go" to begin loading propellants into the Falcon 9 rocket. The countdown remains on track for liftoff at 11 p.m. EDT (0300 GMT).


tnt22

Цитировать05/16/2019 05:23 Stephen Clark

Space's launch team is "go" to begin propellant loading at T-minus 35 minutes.