Neil Ashby Presents at Next Scientific Colloquium

Who: Neil Ashby, University of Colorado at Boulder will present on the topic, "Large and Small Relativistic Effects in the Global Positioning System." This talk will review relativistic effects arising from earth and satellite motion, monopole and quadrupole gravitational fields of the earth, and will discuss how these effects are incorporated into the Space and User Segments. Recently discovered relativistic frequency breaks, due to orbit adjustments, will be explained. Several small relativistic effects which are not yet incorporated, but which may become important in the future, will be discussed.

When/Where: Friday, Jan. 10 at 3:30 in the bldg. 3 Goett Auditorium.

For more info, visit: http://lheawww.gsfc.nasa.gov/users/djt/colloq/