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The height of the trees is very variable. NASA is asking people's help to get this altitude information.
In October 2018, the ICESat-2 satellite was launched in space. The satellite, which carries a very advanced technology called ATLAS (Advanced Topographic Laser Altimeter System), is located in orbit of our Earth. Sending 60,000 light beams per second to Earth, ATLAS is also called a space laser.
By measuring the measurement time of the position, angle and return of the laser beams of the ICESat-2 satellite surface, it is possible to successfully measure the height of sea ice, ice land, ocean, water and trees. Scientists, however, want millimeter measurements to be made. At this point, NASA comes in.
With the NASA GLOBE Observer app, when you take a picture of a tree, the data you provide is processed and the height of the tree is removed. The height you have provided is compared to the measurement taken by the satellite and the most accurate result is obtained. In this regard, NASA is asking the help of anyone with a smart phone.
By knowing the length of trees, researchers can predict the health of the world's forests and the amount of carbon dioxide they can absorb. If you want to contribute to the health of our world, you can download the GLOBE Observer app, start taking action and help scientists work with more accurate data and get more accurate results.
Kaynak : https://www.theverge.com/2019/4/15/18308044/nasa-app-point-smartphone-trees-picture-height-satellite-why
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