Abstract: The polar rapid transfer alignment (RTA) is preferred to initialize the moving base. The heading error under the grid frame accumulates with time, and the ...

To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of Earth, to the stratospheric polar vortex. When you purchase through links ...

In the wake of the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the Polar Vortex is bringing days of life-threatening temperatures to much of the ...

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season, followed by some of the coldest temperatures seen in years. The storm began out ...

A major winter storm is impacting much of the nation east of the Rocky Mountains. The storm's intensity is caused by a combination of a stretched polar vortex, a wavy jet stream, and moisture from the ...

Add Yahoo as a preferred source to see more of our stories on Google. Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season, followed ...

If you’ve been waiting for an excuse to stay inside under the covers, today might be your lucky day. A blast of cold, Arctic air is visiting parts of Canada starting on Friday and into the weekend.

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all scientists agree. By Eric Niiler The polar vortex is a ribbon of ...