The characteristic pattern of a target as displayed by detection and classification equipment.

A folded, printed sheet, usually consisting of 16 or 32 pages, that forms a section of a book or a pamphlet; the sheet may have fewer pages, but is always in multiples of four.

The graphic record of the magnetic properties of a vessel automatically traced as the vessel passes over the sensitive element of a recording instrument; more accurately called magnetic signature.

The identifying characteristics peculiar to each type of target which enable detecting apparatus, such as certain fuses, to sense and differentiate targets.

A quantum number α that characterizes a system with the symmetry of a prolate or oblate spheroid and satisfies the equation r =exp (-iπα), where r is the eigenvalue of the system under a rotation through 180° about an axis perpendicular to the symmetry axis.