Page:Glossary of NPIC Terminology (1965).pdf/6

Rh particles of high-energy fuel and particles of an oxidizer are carried in a plastic binder. confirm -- [verb] To classify as firm a function or target previously not so classified. confirmed -- [adj] Denoting a function or target now classified as firm but not previously so classified. cool target -- See. coverage index -- One or a series of overlays showing all photographic reconnaissance missions covering the map sheet to which the overlays refer. crossover -- A condition in which there is a loss of contrast between 2 adjacent objects on infrared imagery. The term is sometimes used to denote temperature crossovers but is more properly used to denote radiometric temperature crossover. (infrared) CW rail car -- A specialized rail car used to transport bulk quantities of CW agents.

darkness (D) -- Lack of illumination completely obscures a target area. definition -- A subjective term indicating the fineness of detail observed on the imagery obtained from any image collection system. The standards of definition are affected by the system resolutions and the range of image contrast. demolition bomb -- A general purpose (GP) bomb designed to meet the greatest number of bombing situations. It has good blast effect, penetration, and some fragmentation. It is used primarily for the destructive effect caused by blast in above-surface explosions, and in earth shock or mining effects resulting from the detonation of buried bombs. (damage assessment) depth bomb -- See. depth charge -- A bomb designed for underwater detonation and, like the light case bomb, designed for maximum blast effect. (damage assessment) depth of field -- The distance between points nearest and farthest from the camera which are acceptably sharp. depth of focus -- The allowable error in lens-to-film distance within which an acceptably sharp image of the subject focused upon will still be obtained. destroyed -- A type of structural damage. In the case of a building, all vertical supports and spanning members are damaged to such an extent that nothing is salvageable. To insure against misuse of this term, its use must be restricted to structures which are completely leveled. In the case of bridges, all spans must be dropped and all piers must require replacement. (damage assessment) Detailed PIR -- A third-phase photographic interpretation report presenting the results of a thorough analysis and a considered interpretation of all pertinent photography of a specific target or targets. detailed photographic coverage plot -- A graphical plot overlay keyed to a WAC (l:l,000,000), depicting the geographic location of mission photography. detect -- To observe a natural or cultural feature on photography. detector -- The sensitive element of the infrared sensor which responds to differences in energy incident upon it. (infrared) diapositive -- See. diffusion -- The scattering of light rays reflected from a rough surface or during the transmission of light through a translucent medium. dike -- An artificial embankment to exclude water. When used along a river, it is also called a levee. direct positive -- See. dismantled -- Status of an identified target or a component thereof for which there is photographic evidence that the target is being taken down, removed, or otherwise being disposed of.