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NASA’s Tiny Satellite Maps Global Ice Couds

A bread loaf-sized satellite has captured the first global picture of the small frozen particles inside clouds, normally called ice clouds, NASA has said

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NASA, Microsoft
After lettuce, astronauts could grow beans in space in 2021. Pixabay

A bread loaf-sized satellite has captured the first global picture of the small frozen particles inside clouds, normally called ice clouds, NASA has said.

Ice clouds start as tiny particles high in the atmosphere. Absorbing moisture, the ice crystals grow and become heavier, causing them to fall to lower altitudes. Eventually, the particles get so heavy, they fall and melt to form rain drops. The ice crystals may also just stay in the air.

Like other clouds, ice clouds affect Earth’s energy budget by either reflecting or absorbing the Sun’s energy and by affecting the emission of heat from Earth into space. Thus, ice clouds are key variables in weather and climate models.

Representational image.
Representational Image, VOA

“Heavy downpours originate from ice clouds,” said Dong Wu, IceCube principal investigator at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.

Measuring atmospheric ice on a global scale remains highly uncertain because satellites have been unable to detect the amount of small ice particles inside the clouds, as these particles are too opaque for infrared and visible sensors to penetrate.

The experimental small satellite, IceCube, deployed from the International Space Station (ISS) in May 2017, has filled this void, NASA said on Tuesday.

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To overcome that limitation, IceCube was outfitted with a submillimeter radiometer that bridges the missing sensitivity between infrared and microwave wavelengths.

Despite weighing only 10 pounds, IceCube is a bona fide spacecraft, complete with three-axis attitude control, deployable solar arrays and a deployable communications antenna.

Originally a 30-day technology-demonstration mission, IceCube is still fully operational in low-Earth orbit almost a year later, measuring ice clouds and providing data that’s “good enough to do some real science,” Wu said. (IANS)

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NASA Failed to Trace Chandrayaan 2’s Vikram Lander on Lunar Surface

On July 22, the Rs 978-crore Chandrayaan-2 was launched into space by India's heavy lift rocket Geosynchronous Satellite Launch Vehicle-Mark III

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NASA, Chandrayaan 2, Vikram Lander
A NASA scientist said the spacecraft failed to trace Vikram because of two reasons -- one, Vikram is located outside the area the US agency photographed, second, because it's lying in a shadowed part of the moon. Wikimedia Commons

US Space agency NASA has once again failed to trace Chandrayaan 2’s Vikram lander on the lunar surface.

A NASA spacecraft clicked photos of the landing site of Vikram earlier this month, but couldn’t capture the lander.

A NASA scientist said the spacecraft failed to trace Vikram because of two reasons — one, Vikram is located outside the area the US agency photographed, second, because it’s lying in a shadowed part of the moon.

On July 22, the Rs 978-crore Chandrayaan-2 was launched into space by India’s heavy lift rocket Geosynchronous Satellite Launch Vehicle-Mark III (GSLV Mk III) in a text book style.

NASA, Chandrayaan 2, Vikram Lander
A NASA spacecraft clicked photos of the landing site of Vikram earlier this month, but couldn’t capture the lander. Wikimedia Commons

The Chandrayaan-2 spacecraft comprised three segments — the Orbiter (weighing 2,379 kg, eight payloads), Vikram (1,471 kg, four payloads) and Pragyan (27 kg, two payloads).

After five earth-bound orbit raising activities, Chandrayaan-2 was inserted into the lunar orbit. On September 2, Vikram separated from the orbiter. It made a historic landing attempt on September 7.

According to NASA, Vikram attempted a landing on a small patch of lunar highland smooth plains between Simpelius N and Manzinus C craters.

This event was India’s first attempt at a soft landing on the moon.

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The US agency said Vikram’s targeted landing site was located about 600 kilometres (370 miles) from the south pole in a relatively ancient terrain (70.8AoS latitude, 23.5AoE longitude).

According to NASA, Vikram had a hard landing and the precise location of the spacecraft in the lunar highlands has yet to be determined. (IANS)