The Domestic Military–Civil GPS Balance.

The following overview of the current
GPS management structure is intended to show how the United States
balances the military and civilian roles domestically as well as in the international
arena.

National Security. The Department of Defense is responsible for the day-today
management and operation of GPS. Within DoD, the U.S. Air Force is in
charge of carrying out these responsibilities. Research and development is
managed by the GPS Joint Program Office (JPO), which is part of the Air Force
Materiel Command in Los Angeles. Personnel from other military services,
DoT, NATO, and other allied nations are also involved. Testing and evaluation
are conducted jointly by the Air Force Operational Test and Evaluation Center
and Air Force Space Command (AFSPACECOM), which also manages the
operation and maintenance of the system.