CURRENT AFFAIRS

2018

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the purpose of the satellite ICESat-2 which is to be launched by NASA?
A
to measure melting ice
B
to observe the weather in Atlantic and Pacific Ocean
C
to study wormhole other in deep space
D
to study the Kuiper belt in the solar system
Explanation: 

Detailed explanation-1: -Launched in 2018, ICESat-2 will carry a laser altimeter that detects individual photons, allowing scientists to measure the elevation of ice sheets, sea ice, forests and more in unprecedented detail. Our planet’s frozen and icy areas, called the cryosphere, are a key focus of NASA’s Earth science research.

Detailed explanation-2: -The primary goal of ICESat is to quantify ice sheet mass balance and understand how changes in the Earth’s atmosphere and climate affect polar ice masses and global sea level. ICESat will also measure the distribution of clouds and aerosols, as well as land topography, sea ice, and vegetation cover.

Detailed explanation-3: -On September 15, 2018, ICESat-2 was launched into orbit. Celebrating two years of elevation data collection over ice, trees, land, and water.

Detailed explanation-4: -ICESat-2 produces elevation measurements that enable the determination of global vegetation height to 3 m accuracy at 1 km spatial resolution in vegetated areas.

Detailed explanation-5: -ICESat-2’s orbit will have an inclination of 92° enabling measurements up to 88° north and south, with a 91-day exact repeat cycle. This will ensure seasonal repeat tracks that are needed for the seasonal ice sheet requirement (Requirement d).

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