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(abbreviated N-s). (See Impulse Intensity.)
Impulse
Intensity (II)
Mechanical impulse per unit area. The System Internationale unit of impulse
intensity is the Pascal-second (abbreviated Pa-s). A conventionally used unit of
impulse intensity is the “tap”, which is one dyne-second per square centimeter;
hence, 1 tap = 0.1 Pa-s.
Impulse Kill The destruction of a target, using directed energy, by ablative shock. The
intensity of directed energy may be so great that the surface of the target
violently and rapidly boils off delivering a mechanical shock wave to the rest of
the target and causing structural failure.
IMPWG Information Policy Working Group.
IMS Integrated Master Schedule.
IMU Inertial Measurement Unit.
IN (1) Air Force component intelligence officer (staff). (2) Instructor. (3) Impulse
Noise.
In Inch.
IN LINAC Induction Linear Accelerator.
In-Flight Target
Update (FTU)
A report to in-flight interceptor weapons. The IFTU provides updated, predictahead
target position, time, and velocity for use within the interceptor’s control
suite to make midcourse corrections to intercept the target.
Inclination The inclination of an orbit is the (dihedral) angle between the plane containing
the orbit and the plane containing the earth’s equator. An equatorial orbit has
an inclination of 0° for a satellite traveling eastward or 180° for a satellite
traveling westward. An orbit having an inclination between 0° and 90° and in
which a satellite is traveling generally eastward is called a prograde orbit. An
orbit having an inclination of 90° passes above the north and south poles and is
called a polar orbit. An orbit having an inclination of more than 90° is called a
retrograde orbit.
Incremental
Funding
The provision (or recording) of budgetary resources for a program or project
based on obligations estimated to be incurred within a fiscal year when such
budgetary resources will cover only a portion of the obligations to be incurred in
completing the program or project as programmed. This differs from full funding,
where budgetary resources are provided or recorded for the total estimated
obligations for a program or a project in the initial year of funding.
Identification
Friend or Foe
(IFF)
A system using electromagnetic transmissions to which equipment carried by
friendly forces automatically responds, fro example by emitting pulses, thereby
distinguishing themselves from enemy forces.
MDA GLOSSARY, VER.4 .0 I
137
Imagery
Correlation
The mutual relationship between the different signatures on imagery from
different types of sensors in terms of position and the physical characteristics
signified.
Independent
Cost Analysis
An analysis of program cost estimates conducted by an impartial body
disassociated from the management of the program. (See Title 10, United
States Code, Section 2434, “Independent Cost Estimates; Operational
Manpower Requirements.”)
Independent Cost
Estimate (ICE)
A cost estimate prepared by an impartial body outside the chain of authority
responsible for acquiring or using the goods or services.
Independent
Evaluation
Report (IER)
Documents the independent evaluation of the system and is based on test data,
reports, studies, and simulations. The IER contains the independent evaluator’s
assessment of key issues, supporting analyses, major findings, and a position on
the future capability of the system to fulfill approved requirements. The IER is
provided to the DAB to support the MS III decision production decision. An IER
may also be used to support LRIP decisions. (U.S. Army)
Independent
Research and
Development
(IR&D)
Effort by industry that is not sponsored by, or required in performance of, a
contract and which consists of projects falling within the areas of basic and
applied research, development, and systems and other concept formulation
studies. Also, discretionary funds which industry can allocate to projects. (See
FAR 31.001.)
Independent
Verification and
Validation (IV&V)
Verification and validation performed by a contractor or Government agency that
is not responsible for developing the product or performing the activity being
evaluated. IV&V is an activity that is conducted separately from the software
development activities.
Indium
Antimonide
Infrared sensing material.
Individual
Acceptance Test
A test of predetermined critical items to verify their operational characteristics
prior to assembly into subsystems. Waivers to this requirement, such as using
　
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