Primary sources

Follow the links below to view some of the primary source documents used in GPS Declassified:

Roger Easton’s presentation at EASCON 69 Conference

Naval Research Laboratory Report 7227 – Timation Development Plan, 1971

NRL Timation Historical Timeline and Background, July 22, 1971

Addendum to Development Concept Paper (4 September 1973) Defense Navigation Satellite Development Program

NAVSTAR GPS Program Management Plan, July 15, 1974

NRL Report 7389 Constellation Study, 1972, by James Buisson and Thomas McCaskill

Roger Easton’s GPS Hall of Fame Acceptance Speech, 1996

NRL GPS Annotated Bibliography



U.S. Coast Guard Navigation Center (NAVCEN)


Articles and Lectures

On the History, Threats and Future Outlook of GPS,” a 90-minute presentation by Richard D. Easton at Meeting #490 of the College of Complexes, Dallas Campus, a free speech forum.

“GPS: Military Asset, Public Utility,” a 90-minute presentation by Richard D. Easton and Eric F. Frazier at Air Force Space Command, Peterson Air Force Base, Colo., July 21, 2016

Part One

Part Two

Part Three

Roger Easton and Richard Easton on The Space Show, September 28, 2008

“Who Invented the Global Positioning System?” by Richard Easton, The Space Review, May 22, 2006

“From Harrison to GPS,” by Richard Easton, paper presented at the symposium: After Longitude – Modern Navigation in Context, National Maritime Museum, Greenwich, UK, Thursday–Friday, 22–23, March 2012

Abstract              Slides

Selected Media Coverage 0f GPS

CBS 60 Minutes – “The Battle Above” – April 26, 2105

Part One

Part Two