NASA and NOAA have developed a new space-based technique for monitoring the ice cover of the Great Lakes. This novel new method is amazingly accurate and can identify a narrow channel of open water cut through the ice by an icebreaker even at night via satellites 500 miles out in space. It’s important to understand these ice and water patterns as the Great Lakes are vital to the U.S. and Canadian economies for shipping, fishing, and public safety. In the past, identification techniques hadn’t gotten it wrong sometimes—identifying ice as water or the other way around. But the new method corrects for that problem and it also tells more about the ice than before like if it’s dense or full of bubbles.