A two-state Kalman estimator for atomic gravimetry

Abstract

We present a two-state Kalman estimator of gravity acceleration and evaluate its performance by numerical simulations and post-measurement demonstration with real-world atomic gravimetry. We show that the estimator-enhanced gravimetry significantly improves upon both short-term sensitivity and long-term stability. The estimates of gravity acceleration demonstrate a τ^{1/2} feature well under white phase noise in the short term, and continue to improve as τ^{-1/2} or improve faster as τ^{-1} in the long term. This work validates the estimation of gravity acceleration as a key topic for future atomic gravimetry.

REVTex 4-1, 7 pages, 5 figures

References in corpus (5)

• Limits to the sensitivity of a low noise compact atomic gravimeter
• Stability comparison of two absolute gravimeters: optical versus atomic interferometers
• Operating an atom interferometer beyond its linear range
• Fluorescence detection at the atom shot noise limit for atom interferometry
• Low noise phase-locked laser system for atom interferometry