Motion measurements taken at the inertial guidance test facility of the Frank J. Seiler Research Laboratory are applied to problems of facility design and inertial hardware testing. Motion measurements are processed to form unambiguous estimates of platform strain, rotation, and translation to allow a determination of the loop response of the test platform to ground motion and intralaboratory disturbances. In its open loop state, intralaboratory disturbances are found to be dominant source of platform motion, even under quiet conditions. (Author).