Page:Glossary of NPIC Terminology (1965).pdf/10

Rh fiducial marks usually defines the principal point.

fire damage —— Damage caused by combustion, however ignited. (damage assessment)

firm —— Evidence is sufficient to permit a defi- nite identification of a function or target.

first—phase report —- One issued immediately after the receipt of new mission photography and giving information on the highest priority targets derived from rapid initial PI ex- ploitation. (F irst-phase reports produced by NPIC are the OAK-—Parts land ll, lPlR, MI, and SITSUM.)

flame bucket -— The structure used to deflect the engine exhaust gases,often water cooled, in liquid rocket engine test stands.

flame deflector —— A device for deflecting the exhaust flame of a rocket motor away from structural areas the flame might damage.

flare -— A fogged or dense area on a photo— graphic negative caused by nonfocused light reaching the photosensitive emulsion; this results either from internal camera reflec— tions or from such external media as the atmosphere, water, or highly reflective ob— jects.

floating dock —— A type of drydock composed of l or more sections which can be submerged to receive a vessel, then resurfaced so as to expose the bottom of the vessel.

fragmentation bomb —— A bomb designed so that the bomb case and/0r special filling of the bomb shatters into a large number of frag- ments which are sprayed destructively in all directions. feet against personnel, aircraft on the ground, lightly armored equipment, and materiel.

It is designed for maximum ef-

(damage assessment) frame —— One of a series of full-format photo- graphs comprising a roll of film.

generation —- The number of reproductive steps by which a negative or positive photographic copy is separated from the original. Thus the original negative would be the first generation; any positive made from the origi— nal negative would be a second generation copy; any duplicate negative made from a second generation positive would be a third generation copy; and any positive made from the third generation duplicate negative would be a fourth generation copy.

good interpretability —- See interpretability.

ground resolution —— The ground size equivalent of the smallest still resolved image and its associated space, usually expressed in feet per side.

gutted —— See structural damage and superficial

dam age.

halation -— A spreading of light beyond its true boundaries from bright parts of aphotograph— ic image into adjacent darker parts as a re— sult of reflection from the back surface of the film or plate.

haze (H) -- All or portions of a target area are obscured by a thin vapor of suspended fog, smoke, dust, etc., in the air.

heat capacity —— The ratio of the heat supplied to an object to the corresponding tempera- ture rise of that object which, in turn, affects the amount of infrared radiation. (infrared)

heterostereoscopy —— Stereo viewing of a target in a stereogram composed of images photo— graphed with a different time element topor- tray the following aspects: snow and non-

snow, foliage and nonfoliage, displacement

caused by movement, change in building

status, camouflage, etc.