Help NASA’s Laser-Scanning Satellite by Measuring Trees With Your Phone

https://www.extremetech.com/wp-content/uploads/2018/08/icesat2-hqprint-768x432.jpg 768w, https://www.extremetech.com/wp-content/uploads/2018/08/icesat2-hqprint-640x360.jpg 640w, https://www.extremetech.com/wp-content/uploads/2018/08/icesat2-hqprint-223x126.jpg 223w, https://www.extremetech.com/wp-content/uploads/2018/08/icesat2-hqprint-106x59.jpg 106w, https://www.extremetech.com/wp-content/uploads/2018/08/icesat2-hqprint-348x196.jpg 348w" sizes="(max-width: 300px) 100vw, 300px" /> ICESat-2 measures elevation from orbit as part of NASA’s climate research, but the agency would like some data from the ground to verify those readings. So, it’s rolled out a new tool