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Defensive
Counter
Measures (DCM)
Actions taken to eliminate an ASAT attack.
Defensive
Technologies
Study Team
(DTST)
A committee, generally known as the “Fletcher Panel” after its Chairman,
appointed by (former) President Reagan to investigate the technologies of
potential BMD systems.
DEFSMAC Defense Special Missiles and Astronautics Center, Ft. Meade, MD.
DEIS Defense Enterprise Integration Services (ex-DTIS).
DEL Delivery.
Delivery Error The inaccuracy associated with a given weapon system resulting in a dispersion
of shots about the aiming point. See also Circular Error Probable.
MDA GLOSSARY, VER. 4.0 D
77
Delta-V A numerical index of the maneuverability of a satellite or rocket. It is the
maximum change in velocity, which a spacecraft could achieve in the absence of
a gravitational field.
Dem/Val OBSOLETE. Demonstration and Validation (DD 5000 term).
Demise Altitude Altitude at which object of interest (decoy, chaff, etc.) no longer performs its
desired function (matching RV characteristics, screening RV, etc.)
DEMO Demonstration.
Demonstration
and Validation
(Dem/Val)
The acquisition phase when major program characteristics and product designs
are refined through extensive study and analysis, hardware development, test,
and evaluations. The objective is to validate the choice of alternatives and to
provide the basis for determining whether or not to proceed into Engineering and
Manufacturing Development (EMD).
Denial Measure An action to hinder or deny the enemy the use of space, personnel, or facilities.
It may include destruction, removal, contamination, or erection of obstructions.
DEO Defense Employment Option.
Department of
Defense
Acquisition
System
A single uniform system whereby all equipment, facilities, and services are
planned, designed, developed, acquired, maintained, and disposed of within the
Department of Defense. The system encompasses establishing and enforcing
policies and practices that govern acquisitions, to include documenting mission
needs and establishing performance goals and baselines; determining and
prioritizing resource requirements for acquisition programs; planning and
executing acquisition programs; directing and controlling the acquisition review
process; developing and assessing logistics implications; contracting; monitoring
the execution status of approved programs; and reporting to Congress. (See
DoD Directive 5134.1, “Under Secretary of Defense (Acquisition).”)
Deployment (1) The placement of force elements in battle positions to obtain a higher
state of readiness.
(2) The movement required to place force elements in battle positions.
(3) Fielding the weapons system by placing it into operational use with units
in the field/fleet.
(4) To arrange, place, or move strategically.
Deployment
Planning
(1) The development and maintenance of plans required to initially deploy,
maintain, and evolve the operational system in accordance with
schedules and priorities. It includes factors such as launch facility
availability and planning for the availability of other required elements
such as trained personnel or units. In addition, it identifies the impact of
deployment on operational readiness and any testing constraints
associated with deployment.
(2) Encompasses all activities from origin or home station through
destination, specifically including intra-continental United States, intertheater,
and intra-theater movement legs, staging areas, and holding
areas.
Deployment
Testing
The testing and/or simulation of system assets in the physical and operational
environment in which they are expected to perform.
DepOpsDep Service Deputy Operations Deputies.
MDA GLOSSARY, VER. 4.0 D
78
Depressed
Trajectory
Trajectory with an apogee below that of the minimum-energy trajectory.
DEPSCoR Defense Experimental Program to Stimulate Competitive Research.
DEPSECDEF Deputy Secretary of Defense.
DeSecState Deputy Secretary of State.
DERA Defense Evaluation and Research Agency. Consolidated research and
development resources of the U.K. Ministry Defence. Headquartered in
Farnborough, England.
Derivative
Classification
A determination that information is in substance the same as information
currently classified and the application of the same classification marking.
DES Data Encryption Standard.
DESC Defense Electronics Supply Center (DLA term).
Design
Constraints
Boundary conditions within which the developer must remain while allocating
performance requirements and/or synthesizing system elements.
　
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