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Cubesat : teknologi satelit-kecil  untuk mengamati fenomena fisik jauh dari Bumi

Date:

May 19, 2015

Source:

NASA/Goddard Space Flight Center

Summary:

.

Meskipun para ilmuwan semakin menggunakan pin-size satellites  kadang-kadang tidak lebih besar dari sepotong roti untuk mengumpulkan data dari orbit rendah Bumi , mereka belum menerapkan teknologi satelit – kecil yang lebih murah untuk mengamati fenomena fisik jauh dari daratan . Para ilmuwan sekarang maju dengan konsep CubeSat yang akan memberikan para ilmuwan kemampuan itu.....read more

Cubesat: Small-satellite technology to
observe physical phenomena far from Earth

Date:

May 19, 2015

Source:

NASA/Goddard Space Flight Center

Summary:

Although scientists are increasingly using pint-size satellites sometimes
no larger than a loaf of bread to gather data from low-Earth orbit, they have
yet to apply the less-expensive small-satellite technology to observe physical
phenomena far from terra firma. Scientists are now advancing a CubeSat concept
that would give scientists that capability.

...................

Although scientists are increasingly using pint-size satellites sometimes
no larger than a loaf of bread to gather data from low-Earth orbit, they have
yet to apply the less-expensive small-satellite technology to observe physical
phenomena far from terra firma.

Jaime Esper, a technologist at NASA's Goddard Space Flight Center in
Greenbelt, Maryland, however, is advancing a CubeSat concept that would give
scientists that capability.

Technologist Jaime Esper and his team are planning to test the stability of
a prototype entry vehicle -- the Micro-Reentry Capsule (MIRCA) -- this summer
during a high-altitude balloon mission from Ft. Sumner, New Mexico.

Dubbed the CubeSat Application for Planetary Entry Missions (CAPE), the
concept involves the development of two modules: a service module that would
propel the spacecraft to its celestial target and a separate planetary entry
probe that could survive a rapid dive through the atmosphere of an
extraterrestrial planet, all while reliably transmitting scientific and
engineering data.

Esper and his team are planning to test the stability of a prototype entry
vehicle -- the Micro-Reentry Capsule (MIRCA) -- this summer during a
high-altitude balloon mission from Fort Sumner, New Mexico.

'Like No Other CubeSat Mission'

"The CAPE/MIRCA concept is like no other CubeSat mission," Esper
said. "It goes the extra step in delivering a complete spacecraft for
carrying out scientific investigations. We are the only researchers working on
a concept like this."

Under his concept, the CAPE/MIRCA spacecraft, including the service module
and entry probe, would weigh less than 11 pounds (4.9 kilograms) and measure no
more than 4 inches (10.1 centimeters) on a side. After being ejected from a
canister housed by its mother ship, the tiny spacecraft would unfurl its
miniaturized solar panels or operate on internal battery power to begin its
journey to another planetary body.

Once it reached its destination, the sensor-loaded entry vehicle would
separate from its service module and begin its descent through the target's
atmosphere. It would communicate atmospheric pressure, temperature, and
composition data to the mother ship, which then would transmit the information
back to Earth.

The beauty of CubeSats is their versatility. Because they are relatively
inexpensive to build and deploy, scientists could conceivably launch multiple
spacecraft for multi-point sampling -- a capability currently not available
with single planetary probes that are the NASA norm today. Esper would equip the
MIRCA craft with accelerometers, gyros, thermal and pressure sensors, and
radiometers, which measure specific gases; however, scientists could tailor the
instrument package depending on the targets, Esper said.

Balloon Flight to Test Stability

The first step in realizing the concept is demonstrating a prototype of the
MIRCA design during a balloon mission this summer. According to the plan, the
capsule, manufactured at NASA's Wallops Flight Facility on Virginia's Eastern
Shore, would be dropped from the balloon gondola at an altitude of about 18.6
miles (30 kilometers) to test the design's aerodynamic stability and
operational concept. During its free fall, MIRCA is expected to reach speeds of
up to Mach 1, roughly the speed of sound.

"If I can demonstrate the entry vehicle, I then could attract
potential partners to provide the rest of the vehicle," Esper said,
referring to the service module, including propulsion and attitude-control
subsystems. He added that the concept might be particularly attractive to
universities and researchers with limited resources.

In addition to the balloon flight, Esper said he would like to drop the
entry vehicle from the International Space Station perhaps as early as 2016 --
a test that would expose the capsule to spaceflight and reentry heating
conditions and further advance its technology-readiness level.

"The balloon drop of MIRCA will in itself mark the first time a
CubeSat planetary entry capsule is flight tested, not only at Goddard, but
anywhere else in the world," he said. "That in turn enables new
opportunities in planetary exploration not available to date, and represents a
game-changing opportunity for Goddard."







Story Source:

The above story is based on materials provided byNASA/Goddard
Space Flight Center. The original article was written by Lori
Keesey. Note: Materials may be edited for content and length.

http://www.sciencedaily.com/releases/2015/05/150519182239.htm

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