GPS Archives - Geography Realm

Geography 101, Physical Geography

Tracking Ocean Currents With Seabirds

A group of researchers wanted to test if drifting seabirds could offer a novel way of collecting data about sea current velocity and direction.

The Airy meridian marked as the “Prime Meridian of the World” (dotted line), and the modern reference meridian indicating zero longitude using GPS (solid line). (Imagery © 2014 Google Maps, Infoterra Ltd. & Bluesky)

The Prime Meridian isn’t Where You Think it is

The true Prime Meridian is located about 334 feet east of the current Airy Transit Circle at the Royal Observatory in Greenwich, England.

GPS sites showing the measured displacement. As the drought deepens in March of 2014, the red dots showed the greatest uplift in the Sierra Mountains. Source: Borsa et al.

Tracking the Effects of Drought in the Western U.S. with GPS

The effects of the drought that has stricken the western United States can be measured with GPS. As anyone who has lugged around a one gallon bottle of water knows, water is heavy. Erosion is not the only way that rivers and lakes affect the landscape, now researchers from the Scripps […]