acm-header
Sign In

Communications of the ACM

ACM News

Nasa Pinning Down Where 'here' Is Better Than Ever


View as: Print Mobile App Share: Send by email Share on reddit Share on StumbleUpon Share on Hacker News Share on Tweeter Share on Facebook
Next-Generation Satellite Laser Ranging system

NASA's Jan McGarry (left) and Stephen Merkowitz stand next to the Next-Generation Satellite Laser Ranging system, one of the ground stations that makes up the quadrangle of instruments known as the Space Geodesy project, as it peeks through the station's open dome.

Credit: NASA/GSFC/Elizabeth Zubritsky

Before our Global Positioning System navigation devices can tell us where we are, the satellites that make up the GPS need to know exactly where they are.

From Jet Propulsion Laboratory / NASA
View Full Article

 


 

No entries found

Sign In for Full Access
» Forgot Password? » Create an ACM Web Account