Unimpeded by clouds or smoke, LIDAR satellites pan across Earth's entire surface every 12 days. 2:16 Successive images can be compared to observe sub-mm movement. (That implies the satellite plane above the earth is more stable than a sensor on the ground itself.)
4:09 They mapped the interior of a pyramid by listening to it vibrate [from background seismic vibrations] from space.
No comments:
Post a Comment