Flying high: Next ISS crew set to reach station in record time

The next crew to set off for the International Space Station may reach it in a record six hours, far outstripping the current time of two days. The quicker trip is now possible thanks to a launch trajectory, which is currently undergoing tests.

The 35th space mission to the ISS consists of a Russian-US crew
and includes cosmonauts Pavel Vinogradov and Alexander Misurkin
together with NASA astronaut Chris Cassidy. The launch is scheduled
on March 28 at 2043 GMT from the Baikonur Cosmodrome in Kazakhstan
aboard a Russian Soyuz spacecraft.

The new fast-track trajectory has the rocket launching shortly
after the ISS passes overhead.

Normally it takes Soyuz capsules two days to reach the orbiting
laboratory after launch. Vinogradov, Misurkin and Chris Cassidy are
set to make the trip faster than any other astronauts before them –
in just six hours. Docking is set for 0231 GMT on March 29. The
planned duration of the expedition is 168 days. The crew will
undertake a scientific program involving dozens of experiments,
unload four Russian “Progress” cargo spaceships and also conduct a
series of spacewalks.

One of the reasons given in the past for having the two-day or
even three-day flight in the Soyuz was to allow the crew members
time to acclimatize to being in zero-gravity.

L-R: cosmonauts Alexander Misurkin, Pavel Vinogradov and Chris Cassidy at a training session of the ISS 35/35 prime crew in a Soyuz TMA_M simulator at the Gagarin Cosmonaut Training Center (RIA Novosti / Grigory Syisoev)

The actions of the cosmonauts will be the same as what they do
on a two-day profile, according to the participant of 35th space
expedition to ISS, Chris Cassidy. Normally they go to bed and have
a period of time on the next day when cosmonauts just monitor the
vehicle.

“On our mission it all will happen in a tight sequence of six
hours. We have periods of about 45 minutes or so in between these
maneuvers – it’s a bit of downtime, but technically that’s how it’s
possible. There’s tighter constraints on where the space station
can be on launch time than on a typical profile the space station
has a little more leeway on where can it be at the time of
launch,”
added Cassidy.

The fast-track trajectory is not a completely new practice, with
the method already being tested on cargo vehicles. But now they
will ‘try to do it on the manned vehicles,’ head of the Gagarin
Cosmonaut Training Center, Sergey Krikalev told NASA TV.

“Now we have onboard new machinery and new software, so the
vehicle is more autonomous, so it’s possible to do a lot onboard
the vehicle and to calculate the burns so they don’t consume a lot
of fuel,”
added the former cosmonaut.

Additional firings of the vehicle’s thrusters early after launch
are said to help shorten the time it takes to reach the
station.

The new fast-track trajectory could become a permanent feature
of ISS missions, either by the end of this year or starting from
2014.

Source Article from http://rt.com/news/iss-crew-record-time-962/

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