Accession Number : AD0748274

Title :   Earth Motions and their Effects on Inertial Instrument Performance.

Descriptive Note : Air Force surveys in geophysics,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA

Personal Author(s) : Gray, Robert A. ; Cabaniss, Gerry H. ; Crowley, Francis A. ; Ossing, Henry A. ; Rhoades, Thomas S.

Report Date : MAY 1972

Pagination or Media Count : 62

Abstract : A limiting factor in realizing the ultimate sensitivity and associated system accuracy of the more advanced inertial guidance instrumentation is the adverse influence of earth motions on performance. Motions of concern to inertial guidance testing and operations are categorized as propagating and non-propagating. Propagating motions include earth background noise and seismic events while non-propagating motions include local and regional tilts, earth tides, polar wobble, irregularities in earth rate, and precession. Motion measurement philosophy and instrumentation are discussed. (Author)

Descriptors :   *GUIDED MISSILES, *INERTIAL GUIDANCE, TERMINAL GUIDANCE, SENSITIVITY, MICROSEISMS, GYRO STABILIZERS, ACCURACY, CORRECTIONS.

Subject Categories : Air Navigation and Guidance
      Guided Missile Traj, Accuracy and Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE