NASAのインスタグラム(nasagoddard) - 10月6日 05時44分

We’re unbearably excited for #FatBearWeek at Katmai National Park & Preserve in Alaska (@katmainpp)! 🐻

But we were thinking... it has to be pretty impawsable to get those bears onto a scale.

@nationalparkservice employees would agree. This is where the ice sheets come in… bear with us.

A few years ago, Alaska Regional GIS Specialist Joel Cusick devised a method of laser scanning to non-invasively measure the volume of our fat and furry friends. It turns out that we use similar methods at Goddard to measure ice sheets! 🧊

In missions like #ICESat2, we use lasers in a remote sensing method called Lidar (Light Detection and Ranging), which uses pulses of laser light to precisely measure the height of ice sheets on Earth.

To us, that seems like a bearable alternative to an employee with a scale.

Image description:
Landsat satellite image of Katmai National Park taken on Sept. 23, 2014. The landscape is green and tan with bright white, ice-capped mountains on the right. Dark blue lakes and rivers run through the image and the ocean is visible on the right.

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