The Global Positioning System (GPS) is a space-based signal providing precise timing, location, and velocity information. Just as any number of receivers can tune into a commercial TV or radio station, there is no limit on the number of people who can use GPS.
As of the end of 1997, the U.S. had cooperative agreements with 76 countries and six multinational organizations covering the operations of 32 active satellites. This report catalogs the agreements and assesses the extent of interagency coordination.
The proliferation of Third World ballistic missiles is a major concern for the U.S. government. This paper evaluates the effectiveness of U.S. control policies as they pertain to ballistic missiles, focusing on those with ranges of 300-1000 km.
Presents the analytical procedures and mathematical formulations required to construct a computer model of a military communication satellite system, load it efficiently with the radio signals required to support an operational scenario ...
This report presents the results of a theoretical analysis of a frequency-hopping, multiple-frequency-shift-keyed, spread-spectrum communication system using a nonprocessing communication satellite transponder.
Since the Global Positioning System (GPS) was originally deployed to aid U.S. armed forces in navigation and position location, it has evolved into a resource supporting civil, scientific, and commercial functions—from air traffic control to the Internet—with precision location and timing information.
The evolution of GPS into an information system with a substantial international user community has raised complex policy questions for U.S. decisionmakers on a variety of issues affecting national defense, commerce, and foreign policy.
This Note lays out a recommended strategy for the Army's role in space, drawing on research the Arroyo Center has performed in this area over the past seven years. The document argues that the Army should make supporting the battlefield commander its...