Iridium Next Flight 4 (x10) - Falcon 9 - Vandenberg SLC-4E - 23.12.2017, 01:27:34 UTC

Автор tnt22, 17.10.2017 00:18:50

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tnt22

Н-да, за неимением гербовой...

Прогноз погоды L-3 от 2017-12-19
Цитировать 30th Space Wing (Vandenberg Air Force Base, Calif.)
2 ч ·

L-3 Day Planning Forecast
 Western Range Operation Forecast
 W7510
 Issued: 19 Dec 17 / 0800L (1600Z)
 Valid: 22 Dec 17 / 1727L (23/0127Z)
 Vehicle/Payload: Falcon 9/Iridium-4
 Location: VAFB SLC-4
 T-0 Forecast: High pressure will build into the western CONUS in the wake of Wednesday's cold frontal passage. The impact will be relatively dry northwesterly flow aloft, light surface winds with the loose pressure gradient and no marine layer clouds. Surface winds will be out of the northwest through north from 320-350 at 8-12 knots for T-0. Temperatures will range from 55-60F at T-0. Upper-level winds will be out of the northwest from 330 at 75 knots between 38,000 to 41,000 feet. And finally, the space weather indices for proton and x-ray flux are currently reading at background levels. The overall POV will be 0% with no areas of concern.
 24 Hour Scrub Forecast: A weak upper level trough of low pressure will move into central California which will bring an increase in high-level clouds; otherwise, expect similar conditions as the primary day. Surface winds will be out of the northwest through north from 320-350 at 8-12 knots for T-0. Temperatures will increase slightly at 57-62F while max upper-level winds will decrease slightly, remaining out of the northwest at 70 knots from 38,000 to 41,000 feet. The overall POV will be 0% with no areas of concern.
 Significant Clouds:
 Cirrus
 Coverage
 1/8 ths
 Bases
 28,000 ft
 Tops
 29,000 ft
 Visibility: 7 Miles
 Weather: None
 Wind: 320 - 350 at 8 - 12 knots
 Temperature: 55 - 60° F
 Overall probability of violating weather constraints: 0%
 Area of concern: None
 Overall probability of violating weather constraints for 24 Hour Delay: 0%
 Area of concern: None
100% GO

tnt22

Хых, ну это-то другое дело - таки официальная бумага  :D  

Прогноз погоды L-2

20-DEC-17 - SpaceX Falcon 9 Iridium-4 Forecast
 
100% GO

tnt22

#43
"Совсем перед Рождеством расслабились!..
Ну хотя бы так:

Прогноз погоды L-1
Цитировать 30th Space Wing (Vandenberg Air Force Base, Calif.)
2 ч ·

L-1 Day Planning Forecast
 Western Range Operation Forecast
 W7510
 Issued: 21 Dec 17 / 0600L (1400Z)
 Valid: 22 Dec 17 / 1727L (23/0127Z)
 Vehicle/Payload: Falcon 9/Iridium-4
 Location: VAFB SLC-4
 T-0 Forecast: High pressure continues to build into the western CONUS in the wake of yesterday's cold frontal passage. The impact will be relatively dry northwesterly flow aloft, light surface winds with the loose pressure gradient and no marine layer clouds. Surface winds will be out of the northwest through north from 320-350 at 8-12 knots for T-0. Temperatures will range from 55-60F at T-0. Upper-level winds will be out of the northwest from 330 at 80 knots between 38,000 to 41,000 feet. And finally, the space weather indices for proton and x-ray flux are currently reading at background levels. The overall POV will be 0% with no areas of concern.
 24 Hour Scrub Forecast: A weak upper level trough of low pressure will move into central California which will bring an increase in high-level clouds; otherwise, expect similar conditions as the primary day. Surface winds will be out of the northwest through north from 320-350 at 8-12 knots for T-0. Temperatures will increase slightly at 57-62F while max upper-level winds will decrease, remaining out of the northwest from 300 at 60 knots from 38,000 to 41,000 feet. The overall POV will be 0% with no areas of concern.
 Significant Clouds:
 Cirrus
 Coverage 1/8 ths
 Bases 28,000 ft
 Tops 29,000 ft
 Visibility: 7 Miles
 Weather: None
 Wind: 320 - 350 at 8 - 12 knots
 Temperature: 55 - 60° F
 Overall probability of violating weather constraints: 0%
 Area of concern: None
 Overall probability of violating weather constraints for 24 Hour Delay: 0%
 Area of concern: None
100% GO

Update:
Вышел официальный документ - 21-DEC-17 - SpaceX Falcon 9 Iridium-4 Forecast

tnt22

Компания SpaceX выпустила пресс-кит миссии

iridium4presskit.pdf - 269.7 KB, 2017-12-22 00:25:12 UTC

tnt22





tnt22

По адресу - spacex.com/webcast - опубликована информация о предстоящей миссии
Цитировать
IRIDIUM-4 MISSION

SpaceX is targeting launch of Iridium-4 from Space Launch Complex 4E (SLC-4E) at Vandenberg Air Force Base in California. The instantaneous launch window is at 5:27 p.m. PST on Friday, December 22, or 1:27 UTC on Saturday, December 23. A backup launch opportunity is at 5:21 p.m. PST on Saturday, December 23, or 1:21 UTC on Sunday, December 24. This is the fourth set of 10 satellites in a series of 75 total satellites that SpaceX will launch for Iridium's next generation global satellite constellation, Iridium® NEXT.

Falcon 9's first stage for the Iridium-4 mission previously supported the Iridium-2 mission from SLC-4E in June 2017. SpaceX will not attempt to recover Falcon 9's first stage after launch.

You can watch the launch live below and find more information about the mission in our press kit..

tnt22

О трансляции пуска

ЦитироватьНа сайте

spacex.com/webcast

или

на ТыТрубе - Iridium-4 Webcast

youtube.com/watch?v=wtdjCwo6d3Q


tnt22

Цитировать Sandy Mazza‏Подлинная учетная запись @SandyMazza 49 мин. назад

Falcon 9 is lying down at SpaceX's launchpad at Vandenberg AFB prepping for tomorrow's launch at 5pm ish


tnt22

Цитировать Jay L. DeShetler‏ @jdeshetler 16 мин. назад

Although the Falcon F9 Iridium NEXT 4 was covered with two dark canvas, the fins still can be seen. @NASASpaceflight @ChrisG_NSF

Pirat5

Ступень с решётками, но без ножек, и очищенная от сажи!   :o    загадочно!
детально:

Pirat5

#54
на патче клевер - (обычно) место посадки - далеко в океане.
ЦитироватьMeco at 02:33. That's 9sec later than at Iridium 1 & 2, or 10sec later than at Iridium 3.
какие-то новые эксперименты.

ну да, пуски F9 становятся такой обыденностью. надо бы разбавить тайной, не только ж авариями привлекать.

Apollo13

Время работы первой ступеи и расстояние до места (отмененной) посадки больше похожи на пуски на ГПО, чем на предыдущие Иридиумы. Новый бесчеловечный эксперимент судя по всему.

Astro Cat

Будут пытаться сажать прям в имитатор СК? =)  Без опор!

tnt22

https://spaceflightnow.com/2017/12/21/falcon-9-rocket-set-for-launch-friday-from-california/
ЦитироватьFalcon 9 rocket set for launch Friday from California
December 21, 2017 Stephen Clark


A Falcon 9 rocket at Vandenberg Air Force Base, California, is ready to be raised vertical on its launch pad for Friday's liftoff. Credit: Gene Blevins/LA Daily News

SpaceX is set to close out a record-breaking 2017 launch campaign Friday night with the delivery of 10 more Iridium voice and data relay satellites to orbit from Vandenberg Air Force Base, California.

A Falcon 9 rocket is awaiting liftoff from Space Launch Complex 4-East at Vandenberg, a military base on California's Central Coast northwest of Los Angeles. Launch is scheduled for 5:27 p.m. PST Friday (8:27 p.m. EST; 0127 GMT).

It will be SpaceX's 18th Falcon 9 mission of the year, a record for a commercial launch company, and the fifth time a Falcon 9 rocket will fly with a previously-used first stage booster.
Спойлер
The 10 satellites inside the rocket's payload fairing will join 30 others launched by three Falcon 9 missions earlier this year, pushing Iridium's voice and data relay network over the halfway point in deploying a next-generation fleet of 81 spacecraft to replace an aging constellation dating back to the late 1990s and early 2000s.

Iridium has invested $3 billion in the next-generation network, ensuring the company's more than 900,000 subscribers have uninterrupted service, and debuting new communications capabilities — such as video and Internet — alongside the current telephone, messaging and tracking applications

The new Iridium Next satellites, built by Thales Alenia Space and Orbital ATK in Arizona, each weigh about 1,896 pounds (860 kilograms) and are designed to function at least 15 years in orbit.

"We're approaching our halfway point on this journey, and with each launch, we gain more momentum," said Matt Desch, Iridium's CEO. "This launch will bring us to 40 Iridium Next satellites in space, which is more than half the number required for a full Iridium Next operational constellation. It has been remarkable to witness the increased speed, capacity and throughput of our network as we continue to replace our original satellites with new Iridium Next satellites."

The Iridium fleet uses 66 active satellites spread into six orbital planes, ensuring the network has global coverage. Each spacecraft carries inter-satellite radio links to hand off data and voice traffic without transmitting to the ground.

It will take about an hour for the Falcon 9 rocket to release the 10 satellites one at a time in a polar orbit 388 miles (625 kilometers) above Earth.

Friday's launch will be the first time Iridium has elected to put its satellites on a previously-flown Falcon 9 booster. The first stage set for launch from Vandenberg first flew June 25 on a previous mission for Iridium, making the Virginia-based telecom company the first customer to use the same Falcon 9 booster twice.

Desch said in October that Iridium chose to go with previously-flown boosters on its next two launches — the flight Friday and one in early 2018 — to keep pace with plans to complete the deployment of 75 new-generation satellites by the middle of next year.


A SpaceX Falcon 9 booster pictured after its return to port in Southern California following a launch in June. The same first stage will fly Friday for the second time. Credit: SpaceX

Iridium has purchased eight Falcon 9 rocket flights from SpaceX, and four more will remain after Friday's mission.

"Our technical teams really dug into it, it was clear that SpaceX has been designing for reusability all along," Desch said in an interview in October. "They have a lot of engineering data and work, that by the time we got through all that due diligence, we felt that the risks were no higher, and maybe lower, in using a flight-proven booster."

All four previous re-flights of Falcon 9 boosters have been successful, boosting payloads into space for SES, BulgariaSat and NASA.

The 229-foot-tall (70-meter) Falcon 9 will head south after liftoff from Vandenberg, riding 1.7 million pounds of thrust into the sky shortly after sunset at the California launch base.

The slender white rocket will exceed the speed of sound in about a minute, and its nine Merlin 1D main engines will switch off at T+plus 2 minutes, 33 seconds. Three seconds later, the Falcon 9's first stage will fall away, followed by ignition of the upper stage's single Merlin powerplant to continue into orbit.

SpaceX does not plan to recover the first stage on Friday's launch.

It is rare that the company does not try to land one of its rockets for refurbishment and reuse. The Falcon 9's first stage was disposed on three missions earlier this year, but those carried heavy satellites bound for geostationary orbit, a perch more than 22,000 miles (nearly 36,000 kilometers) above the planet.

Launch profiles to such lofty orbits need more speed, and more fuel.

But the three earlier launches for Iridium included first stage landings on SpaceX's mobile platform in the Pacific Ocean.

A reason for doing away with the landing on Friday's launch has not been confirmed by SpaceX.

"These are case by case decisions and are based on mission requirements and the needs of our manifest," a SpaceX spokesperson said.

The Falcon 9's payload fairing, a structure which cocoons the satellites during the first few minutes of flight, will release in a clamshell-like fashion at T+plus 3 minutes, 11 seconds.

SpaceX may try to retrieve part of the payload shroud downrange from Vandenberg. A fast boat linked to experimental fairing recovery attempts, named Mr. Steven, was relocated from Florida to California in recent weeks, and it has sailed south from the Port of Los Angeles on a heading toward the Falcon 9's projected flight path.

Engineers aim to eventually recover fairings, which come off the rocket in two halves, for inspections and re-flights. SpaceX founder Elon Musk said earlier this year the fairing costs around $5 million to produce for each launch, and reusing the parts would help the company achieve its objective of reducing the cost of spaceflight.


The 10 Iridium Next satellites were encapsulated inside the Falcon 9's payload fairing earlier this month. Credit: Iridium

Two burns by the Falcon 9's upper stage are required to place the Iridium satellites into the planned 388-mile-high orbit. The first firing will end at T+plus 9 minutes, and the rocket will coast over the Pacific Ocean, then Antarctica, before reigniting the Merlin engine for a brief 11-second burn at approximately T+plus 52 minutes.

The spacecraft will deploy one-by-one from a specially-designed dispenser on the second stage. The separation sequence should be complete by 6:39 p.m. PST (9:39 p.m. EST; 0239 GMT) to wrap up the Falcon 9's primary mission.

A de-orbit maneuver by the second stage is expected later Friday night to send the rocket on a destructive re-entry back into Earth's atmosphere.

Friday's launch will target Plane 2 of the Iridium fleet, and the liftoff will be timed for an instantaneous opportunity to place the satellites in the right location in the company's network.

Iridium says nine of the 10 satellites launching Friday will go into service in Plane 2 after completing in-orbit testing early next year. Another will drift to Plane 1 to serve as a spare.
[свернуть]

tnt22

https://spaceflightnow.com/2017/12/22/launch-timeline-for-spacexs-fourth-launch-of-iridium-satellites/
ЦитироватьTimeline for SpaceX's fourth launch of Iridium satellites
December 22, 2017 Stephen Clark

Follow the key events of the Falcon 9 rocket's ascent to orbit with the fourth set of 10 next-generation satellites for Iridium's voice and data relay fleet.
Спойлер
The 229-foot-tall (70-meter) rocket will lift off Friday at 5:27 p.m. PST (8:27 p.m. EST; 0137 GMT) from Vandenberg Air Force Base in California.

SpaceX will not attempt to recover the first stage on Friday's mission.

Data source: SpaceX

T-0:00:00: Liftoff


After the rocket's nine Merlin 1D engines pass an automated health check, the Falcon 9 is released from Space Launch Complex 4-East at Vandenberg Air Force Base, California.

T+0:01:14: Max-Q


The Falcon 9 rocket reaches Max Q, the point of maximum aerodynamic pressure. The first stage's nine Merlin 1D engines produce about 1.7 million pounds of thrust.

T+0:02:33: MECO


The Falcon 9's nine Merlin 1D engines shut down.

T+0:02:36: Stage 1 Separation


The Falcon 9's first stage separates from the second stage moments after MECO.

T+0:02:38: Stage 2 Ignition


The second stage Merlin 1D vacuum engine ignites for an approximately 6-and-a-half-minute burn to inject the Iridium Next satellites into a parking orbit.

T+0:03:11: Fairing Jettison


The 5.2-meter (17.1-foot) diameter payload fairing jettisons once the Falcon 9 rocket ascends through the dense lower atmosphere. The 43-foot-tall fairing is made of two clamshell-like halves composed of carbon fiber with an aluminum honeycomb core.

T+0:09:00: SECO 1


The Merlin 1D vacuum engine turns off after placing the Iridium satellites in a temporary parking orbit, beginning at 43-minute coast in space.

T+0:51:54: Stage 2 Restart


The Falcon 9's second stage engine ignites again for an 11-second burn to circularize its orbit.

T+0:52:05: SECO 2


The Merlin 1D vacuum engine shuts down after reaching a target orbit about 388 miles (625 kilometers) high with an inclination of 86 degrees.

T+0:57:05: Begin Iridium Deployments

 
The 1,896-pound (860-kilogram) Iridium Next satellites begin deploying from their two-tier dispenser on the Falcon 9 rocket's second stage, separating at intervals of approximately every 90 seconds.

T+1:12:00: End Iridium Deployments

 
The last of the 10 Iridium Next satellites will separate from the rocket.
[свернуть]

Зловредный

https://twitter.com/IridiumBoss/status/944237612700647424

ЦитироватьWhile no landing, I'm told there should still be some good video on the way down to "water landing".
Так получается всё же не просто утилизация первой ступени, а некий эксперимент?
Гробос-Фунт