P****R
发帖数: 22479 | 1 刚刚！SpaceX一箭10星，成功用一枚二手猎鹰火箭将10颗通讯卫星送入轨道！两天后（
周一）将再次发射，龙飞船！
Liftoff! Used SpaceX Rocket Launches 10 Iridium Satellites into Orbit
By Tariq Malik, Space.com Managing Editor | March 30, 2018 11:15am ET
A used SpaceX Falcon 9 rocket launched 10 new communications satellites into
orbit from California's Vandenberg Air Force Base today (March 30) in a
morning liftoff that also marked an anniversary for reusable rockets.
The Falcon 9 rocket, which first flew in October 2017, launched the fifth
set of Iridium Next satellites for Iridium Communications at 10:13 a.m. EDT
(1413 GMT) — exactly one year to the day after SpaceX's first used Falcon 9
rocket launch and landing. Since then, SpaceX has commonly landed the first
stage of its two-stage Falcon 9 rockets and reused them on later flights.
In fact, the booster that launched today's Iridium-5 mission also launched
10 other Iridium Next satellites on Oct. 9 during SpaceX's Iridium-3 mission
. And last December, Iridium became the first SpaceX customer to launch a
mission on a rocket it used before when the Iridium-4 mission launched with
the same booster SpaceX used to launch 10 other satellites on its Iridium-2
flight in June 2017.
"Today, this is our fifth launch for the Iridium constellation, using only
three rockets," SpaceX materials engineer Michael Hammersley said during
live commentary.
A SpaceX Falcon 9 rocket launched 10 Iridium Next satellites from Space
Launch Complex-4E at Vandenberg Air Force Base on Friday, March 30.
A SpaceX Falcon 9 rocket launched 10 Iridium Next satellites from Space
Launch Complex-4E at Vandenberg Air Force Base on Friday, March 30.
Credit: SpaceX
If that sounds like a lot of launches for Iridium to you, you're not wrong.
Iridium has tapped SpaceX to launch 75 Iridium Next satellites to build up
its communications constellation in orbit. To do that, Iridium has bought
eight Falcon 9 launches for a total of $536 million.
In one departure from typical SpaceX launches, the company cut the live
video feed from the Falcon 9 second stage about 9 minutes into the flight.
"Due to some restrictions from the National Oceanic and Atmospheric
Administration, NOAA for short, SpaceX will be intentionally ending live
video coverage from the second stage just prior to engine shutdown,"
Hammersley said. "We're working with NOAA to address these restrictions in
order to hopefully be able to bring you live views from orbit in the future."
Hammersley did not elaborate on what those NOAA restrictions might be. Space
.com has reached out to SpaceX and NOAA for clarification.
The 10 Iridium Next satellites were scheduled to be deployed about 42
minutes after reaching orbit, bringing Iridium's constellation up to 50
satellites. SpaceX launched the first 10 Iridium Next satellites in January
2017, with three more missions following in June, October and December of
that year. The entire constellation of Iridium Next satellites (which
includes 66 operational satellites and nine in-orbit spares) should be in
orbit by mid-2018 if SpaceX's current launch pace holds.
The Hawthorne, California-based SpaceX has regularly launched, landed and re
-flown Falcon 9 rockets as part of the company's reusable-rocket program
aimed at lowering the cost of spaceflight. However, SpaceX did not attempt
to land the Iridium-5 booster on its offshore drone ship Just Read the
Instructions. Instead, the booster was expected to fly a landing approach
over the open sea in the Pacific Ocean, and then splash down.
Hammersley said SpaceX did send out its recovery boat Mr. Steven, which is
equipped with a giant net held up by huge steel arms, to try to catch half
of the Falcon 9 rocket's payload fairing, the protective nose cone that
covers satellite payloads during launch. SpaceX CEO Elon Musk has called the
boat a "catcher's mitt" in boat form.
SpaceX's first attempt to catch a Falcon 9 fairing just missed earlier this
year. The company is hoping to recover payload fairings, which cost up to $6
million each, to lower the cost of its launches even more.
Today's Iridium-5 mission is not the only one on SpaceX's mind this week.
Another used Falcon 9 rocket is scheduled to launch a Dragon cargo ship,
which has also flown in space before, on Monday (April 2) from Cape
Canaveral Air Force Station in Florida. That Dragon spacecraft will deliver
fresh food, equipment and other supplies to the International Space Station
once it arrives Wednesday (April 4). | L**********g
发帖数: 498 | | c*********e
发帖数: 16335 | 3 Elon Musk也是拼了，tesla不好，就玩火箭。好多蛋，放在不同的篮子里。
into
【在 P****R 的大作中提到】
: 刚刚！SpaceX一箭10星，成功用一枚二手猎鹰火箭将10颗通讯卫星送入轨道！两天后（
: 周一）将再次发射，龙飞船！
: Liftoff! Used SpaceX Rocket Launches 10 Iridium Satellites into Orbit
: By Tariq Malik, Space.com Managing Editor | March 30, 2018 11:15am ET
: A used SpaceX Falcon 9 rocket launched 10 new communications satellites into
: orbit from California's Vandenberg Air Force Base today (March 30) in a
: morning liftoff that also marked an anniversary for reusable rockets.
: The Falcon 9 rocket, which first flew in October 2017, launched the fifth
: set of Iridium Next satellites for Iridium Communications at 10:13 a.m. EDT
: (1413 GMT) — exactly one year to the day after SpaceX's first used Falcon 9
| P****R
发帖数: 22479 | 4 这是第五次了，已经发射了50枚火箭。
铱星一共66枚，还要打两次。
【在 L**********g 的大作中提到】
: 这万一炸了十颗卫星就报废了
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