A
new NASA mission that will boost global monitoring of ocean winds for
improved weather forecasting and climate studies is among about 5,000
pounds (2,270 kilograms) of cargo now on its way to the International Space Station aboard SpaceX's Dragon spacecraft. The cargo ship
was launched on a Falcon 9 rocket from Space Launch Complex-40 at Cape
Canaveral Air Force Station in Florida at 1:52 a.m. EDT Sunday.
This
is the fourth cargo delivery flight for SpaceX (Space Exploration
Technologies Corp.) to the space station through a $1.6 billion NASA
Commercial Resupply Services contract.
One
device aboard Dragon, the International Space Station-Rapid
Scatterometer, or ISS-RapidScat, will monitor ocean winds from the
vantage point of the space station. This space-based scatterometer,
developed by NASA's Jet Propulsion Laboratory (JPL), Pasadena,
Calif., is a remote sensing instrument that uses radar pulses
reflected from the ocean's surface from different angles to calculate
surface wind speed and direction. This information will be useful for
weather and marine forecasting and hurricane monitoring.
ISS-RapidScat
will be in an orbit that is unique from any other wind measuring
instrument currently in space. This vantage point will give
scientists the first near-global direct observations of how ocean
winds vary over the course of the day due to solar heating. The new
mission will also provide cross-calibration of the international
constellation of ocean wind satellites, extending the continuity and
usefulness of the scatterometer data record.
Approximately
nine days after berthing with the station, the RapidScat instrument
and its nadir adapter, which orients the instrument to point down at
Earth, will be robotically installed on the External Payload Facility
SDX site of the Columbus module over a three-day period by the
station's robotic arm, which is controlled by ground controllers at
NASA's Johnson Space Center. ISS-RapidScat is an autonomous payload,
requiring no interaction from astronauts aboard the station.
Using
a mechanical hand, the station's robotic arm will first extract
RapidScat's nadir adapter from the trunk of the Dragon and install it
on an external site on the Columbus module. The arm will then pluck
the RapidScat instrument assembly from the Dragon's trunk and attach
it to the nadir adapter, completing the installation. Each of the two
operations will take about six hours.
Once
installed, RapidScat will be activated over a period of three days.
Checkout of RapidScat will be completed approximately two weeks after
installation. About two weeks of preliminary calibration and
validation will then follow. RapidScat will then be ready to begin
its two-year science mission.
ISS-RapidScat
is a partnership between JPL and the International Space Station
Program Office at NASA's Johnson Space Center, Houston, with support
from the Earth Science Division of NASA's Science Mission
Directorate, Washington. The device is the third of five NASA Earth
science missions scheduled to launch into space within 12 months.
3-D printing and rodents
Dragon
also will deliver the first-ever 3-D printer in space. The technology
enables parts to be manufactured quickly and cheaply in space,
instead of waiting for the next cargo resupply vehicle delivery. The
research team also will gain valuable insight into improving 3-D
printing technology on Earth by demonstrating it in microgravity.
New
biomedical hardware launched aboard the spacecraft will help
facilitate prolonged biological studies in microgravity. The Rodent
Research Hardware and Operations Validation (Rodent Research-1)
investigation provides a platform for long-duration rodent
experiments in space. These investigations examine how microgravity
affects animals, providing information relevant to human spaceflight,
discoveries in basic biology and knowledge that may have direct
impact toward human health on Earth.
Biological
research
The
Dragon spacecraft will also transport other biological research,
including a new plant study. The Biological Research in Canisters
(BRIC) hardware has supported a variety of plant growth experiments
aboard the space station. The BRIC-19 investigation will focus on the
growth and development in microgravity of Arabidopsis thaliana
seedlings, a small flowering plant related to cabbage. Because plant
development on Earth is impacted by mechanical forces such as wind or
a plant's own weight, researchers hope to improve understanding of
how the growth responses of plants are altered by the absence of
these forces when grown in microgravity.
Dragon
is scheduled to be grappled at 7:04 a.m. EDT on Tuesday by Flight
Engineer Alexander Gerst of the European Space Agency, using the
space station's robotic arm to take hold of the spacecraft. NASA's
Reid Wiseman will support Gerst in a backup position. Dragon is
scheduled to depart the space station in mid-October for a splashdown
in the Pacific Ocean, west of Baja California, bringing from the
space station almost 3,200 pounds (1,450 kilograms) of science,
hardware and crew supplies.
NASA
recently awarded contracts to SpaceX and The Boeing Company to
transport U.S. crews to and from the space station with the goal of
certifying those transportation systems in 2017. Currently, NASA
relies on Russia's Soyuz spacecraft to launch astronauts to and from the space
station.