Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Philip Gatt"'
Autor:
Philip Gatt, Scott M. Shald
The target size plays a key role. When operating against an essentially infinitely wide target, the transmitter and receiver are never misaligned with the target regardless of the size of the pointing error. In this analysis we assume matched ellipti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc19cb973ff346ab317d981553f09156
https://doi.org/10.9734/bpi/nupsr/v11/1769c
https://doi.org/10.9734/bpi/nupsr/v11/1769c
A principal difficulty of long dwell coherent imaging ladar is its extreme sensitivity to target or platform motion. This paper describes a motion compensated frequency modulated continuous wave 3D coherent imaging ladar method that overcomes this mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c370d93852fb3887dc29933d060e554c
https://doi.org/10.9734/bpi/nupsr/v3/7502d
https://doi.org/10.9734/bpi/nupsr/v3/7502d
Autor:
Thomas G. Alley, Brian Krause, Philip Gatt, Samuel T. Thurman, Andrew Bratcher, Kalle Anderson
Publikováno v:
Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP).
Publikováno v:
SPIE Proceedings.
We report on digital holographic imaging through atmospheric turbulence. Data recorded with aberrations is corrected during post processing using an iterative sharpness-metric maximization algorithm. Assuming the correction cancels the actual wavefro
Publikováno v:
Imaging and Applied Optics 2015.
In this paper we describe the evolution of Lockheed Martin Coherent Technologies' (LMCT) 25 year WindTracer® technology. We also present experimental results from recent ground-based measurement campaigns that demonstrate measurement accuracy in bot
Autor:
Scott M. Shald, Philip Gatt
Publikováno v:
Applied optics. 50(26)
Random pointing errors in coherent ladar tend to cause a reduction in measured signal power due to misalignment among the transmitter, receiver, and (hard) target. A simple model for the size of this impact, in terms of the size of the pointing error
Autor:
Derek A. Hutton, Lockheed Martin, Don Jacob, David Y. Lai, Stephen M. Hannon, Philip Gatt, Keith S. Barr, Donald P. Delisi, Scott M. Shald
Publikováno v:
3rd AIAA Atmospheric Space Environments Conference.
A new algorithm for estimating circulation strength of aircraft wake vortices is under development by Lockheed Martin and is being evaluated by NorthWest Research Associates, Inc. (NWRA) under the National Aeronautics and Space Administration Researc
Autor:
Philip Gatt, Scott M. Shald
Publikováno v:
Laser Radar Technology and Applications XVI.
In this paper we present analytic models of the CNR loss or efficiency due to Gaussian line-of-sight pointing errors with bias, as a function of the correlation coefficient between the transmit and back-propagated local oscillator beams of a coherent
Autor:
Don Jacob, Philip Gatt
Publikováno v:
Laser Radar Technology and Applications XV.
In this paper we develop spectral models for windowed speckle-modulated continuous coherent ladar signals with arbitrary coherence time as a function of the window duration and shape. This processing chain (compute the spectrum of the window random s
Publikováno v:
Laser Radar Technology and Applications XI.