Before diving into the methods, it's essential to understand the difference between altitude and elevation. Altitude refers to the height of an object or place above a given planetary reference plane, ...

For more than a decade, survey flights have crisscrossed the United States using gravity instruments to calculate a new sea level in an effort that will save the country billions of dollars on ...

“The snow level has gone from the surface along the Oregon and southwest Washington Coastline to 1000 feet each morning,” Storm Tracker 2 Meteorologist Rhonda Shelby said. The higher up you go into ...