Dr. Douglas G. Youmans Profile

Dr. Douglas G. Youmans

Principal Scientist

SPIE Involvement:

Author

Publications (30)

Proceedings Article | 19 May 2015 Paper

Atmospheric aerosol and molecular backscatter imaging effects on direct detection LADAR

Douglas Youmans

Proceedings Volume 9465, 94650B (2015) https://doi.org/10.1117/12.2176714

KEYWORDS: Backscatter, Aerosols, LIDAR, Atmospheric particles, Refractive index, Atmospheric sensing, Staring arrays, Pulsed laser operation, Sensors, Atmospheric modeling

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Proceedings Article | 9 June 2014 Paper

Outward atmospheric scintillation effects and inward atmospheric scintillation effects comparisons for direct detection ladar applications

Douglas Youmans

Proceedings Volume 9080, 90800C (2014) https://doi.org/10.1117/12.2050674

KEYWORDS: Scintillation, Turbulence, Optical spheres, Speckle, Monte Carlo methods, Atmospheric propagation, Staring arrays, LIDAR, Electroluminescence, Telescopes

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Proceedings Article | 4 June 2013 Paper

Scintillation effects on round-trip ladar imaging through turbulence with finite-sized objects and collecting apertures: modeling advances

Douglas Youmans

Proceedings Volume 8731, 87310V (2013) https://doi.org/10.1117/12.2016201

KEYWORDS: Scintillation, Turbulence, Speckle, LIDAR, Atmospheric propagation, Monte Carlo methods, Staring arrays, Electroluminescence, Atmospheric turbulence, Modulation

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Proceedings Article | 14 May 2012 Paper

Ladar imaging analytical approach using both outward and return path atmospheric turbulence phase-screens

Douglas Youmans

Proceedings Volume 8379, 83790F (2012) https://doi.org/10.1117/12.919402

KEYWORDS: Turbulence, Speckle, Atmospheric propagation, LIDAR, Scintillation, Atmospheric modeling, Atmospheric turbulence, Image processing, Modes of laser operation, Sensors

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Proceedings Article | 9 June 2011 Paper

Linear-mode avalanche photo-diode detectors with a quasi-deterministic gain component: statistical model studies

Douglas Youmans, George Williams, Andrew Huntington

Proceedings Volume 8037, 803716 (2011) https://doi.org/10.1117/12.884170

KEYWORDS: Avalanche photodetectors, Sensors, Single photon, Ionization, Readout integrated circuits, Signal detection, Interference (communication), LIDAR, Statistical analysis, Receivers

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Proceedings Article | 4 May 2010 Paper

Receiver-operating characteristic for several multiple hypothesis range-rate filter algorithms

Douglas Youmans

Proceedings Volume 7684, 768412 (2010) https://doi.org/10.1117/12.849693

KEYWORDS: Interference (communication), Detection and tracking algorithms, Target detection, Monte Carlo methods, Electronic filtering, LIDAR, Pulsed laser operation, Algorithm development, Optical filters, Target acquisition

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Proceedings Article | 9 May 2009 Paper

Waveform comparison for coherent ladar imaging using a helicopter facet model target

Douglas Youmans

Proceedings Volume 7323, 732304 (2009) https://doi.org/10.1117/12.818228

KEYWORDS: LIDAR, Doppler effect, Coherence imaging, Speckle, Image segmentation, Modulation, Sensors, Signal processing, Image quality, Diffraction

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Proceedings Article | 16 April 2008 Paper

Coherent lidar imaging of dust clouds: waveform comparison with the poly-phase (P4) modulation waveform

Douglas Youmans

Proceedings Volume 6950, 695009 (2008) https://doi.org/10.1117/12.778099

KEYWORDS: Aerosols, Clouds, LIDAR, Doppler effect, Coherence imaging, Speckle, Pulsed laser operation, Modulation, Phase modulation, Atmospheric particles

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Proceedings Article | 4 May 2007 Paper

Coherent ladar imaging of the SEASAT satellite retro-reflector array using linear-FM chirp waveforms and pulse-compression

Douglas Youmans

Proceedings Volume 6550, 655004 (2007) https://doi.org/10.1117/12.718534

KEYWORDS: LIDAR, Doppler effect, Satellites, Retroreflectors, Image segmentation, Coherence imaging, Satellite imaging, Signal to noise ratio, Electronic filtering, Sensors

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Proceedings Article | 19 May 2005 Paper

Target spectral estimation using direct detection and coherent detection ladar

Douglas Youmans

Proceedings Volume 5791, (2005) https://doi.org/10.1117/12.604071

KEYWORDS: Speckle, LIDAR, Doppler effect, Target detection, Signal processing, Detection and tracking algorithms, Sensors, Direct detection LIDAR, Interference (communication), Electric field sensors

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Proceedings Article | 13 September 2004 Paper

Spectral estimation of Doppler spread vibrating targets using coherent ladar

Douglas Youmans

Proceedings Volume 5412, (2004) https://doi.org/10.1117/12.560983

KEYWORDS: Doppler effect, LIDAR, Detection and tracking algorithms, Speckle, Algorithm development, Time-frequency analysis, Joint transforms, Signal processing, Curium, Modulation

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Proceedings Article | 8 September 2004 Paper

Round-trip turbulence ladar scintillation modeling using data fits and resulting signal-to-noise ratio

Douglas Youmans

Proceedings Volume 5413, (2004) https://doi.org/10.1117/12.560808

KEYWORDS: Signal to noise ratio, Scintillation, LIDAR, Turbulence, Speckle, Data modeling, Atmospheric scintillation, Atmospheric propagation, Signal detection, Telescopes

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Proceedings Article | 21 August 2003 Paper

Joint time-frequency transform processing for linear and sinusoidal FM coherent ladars

Douglas Youmans

Proceedings Volume 5087, (2003) https://doi.org/10.1117/12.496934

KEYWORDS: Speckle, Signal processing, Doppler effect, LIDAR, Modulation, Curium, Frequency modulation, Fermium, Time-frequency analysis, Monte Carlo methods

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Proceedings Article | 19 September 2001 Paper

Cylindrical target Doppler and Doppler-spread feature estimation using coherant mode-locked pulse laser radars with long observation times

Douglas Youmans

Proceedings Volume 4377, (2001) https://doi.org/10.1117/12.440115

KEYWORDS: Doppler effect, Speckle, Mode locking, LIDAR, Digital filtering, Monte Carlo methods, Signal to noise ratio, Optical character recognition, Pulsed laser operation, Reflectivity

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Proceedings Article | 19 September 2001 Paper

Preamplifier impulse-response shape-driven shot-noise in direct-detection photon-counting laser radars

Douglas Youmans

Proceedings Volume 4377, (2001) https://doi.org/10.1117/12.440112

KEYWORDS: Filtering (signal processing), Monte Carlo methods, Linear filtering, LIDAR, Sensors, Pulsed laser operation, Photons, Electronics, Signal processing, Picosecond phenomena

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Proceedings Article | 5 September 2000 Paper

Electronic bandwidth effects on the DITP photon counting direct-detection laser radar receiver

Douglas Youmans, George Hart

Proceedings Volume 4035, (2000) https://doi.org/10.1117/12.397803

KEYWORDS: Sensors, Stochastic processes, LIDAR, Receivers, Pulsed laser operation, Speckle, Monte Carlo methods, Photodetectors, Photomultipliers, Data modeling

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Proceedings Article | 5 September 2000 Paper

Laser radar vacuum speckle plus atmospheric scintillation: a simple irradiance model

Douglas Youmans

Proceedings Volume 4035, (2000) https://doi.org/10.1117/12.397802

KEYWORDS: LIDAR, Speckle, Turbulence, Statistical analysis, Modes of laser operation, Scintillation, Atmospheric propagation, Direct detection LIDAR, Polarization, Analytical research

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Proceedings Article | 28 May 1999 Paper

Three-dimensional and two-dimensional sequence spatial-frequency domain processing of speckled ladar images for automatic target recognition

Douglas Youmans, George Hart

Proceedings Volume 3707, (1999) https://doi.org/10.1117/12.351369

KEYWORDS: LIDAR, Electronic filtering, 3D image processing, Image filtering, Speckle, 3D acquisition, Phase only filters, Sensors, Optical correlators, Automatic target recognition

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Proceedings Article | 28 May 1999 Paper

Use of the fast Hankel transform for laser radar mode propagation, overlap integral calculation, and laser resonator analysis

Douglas Youmans

Proceedings Volume 3707, (1999) https://doi.org/10.1117/12.351358

KEYWORDS: Mirrors, LIDAR, Resonators, Reflectivity, Laser resonators, Sensors, Near field optics, Radon, Modes of laser operation, Fourier transforms

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Proceedings Article | 8 September 1998 Paper

Numerical evaluation of the M parameter for direct detection ladar

Douglas Youmans, George Hart

Proceedings Volume 3380, (1998) https://doi.org/10.1117/12.327192

KEYWORDS: Speckle, Receivers, LIDAR, Statistical analysis, Photon counting, Modes of laser operation, Fourier transforms, Direct detection LIDAR, Speckle pattern, Sensors

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Proceedings Article | 6 August 1997 Paper

Round-trip turbulence scintillation effects on laser radar: Monte Carlo simulation results for unresolved targets

Douglas Youmans, Venkata Gudimetla

Proceedings Volume 3065, (1997) https://doi.org/10.1117/12.280998

KEYWORDS: Monte Carlo methods, Turbulence, Scintillation, LIDAR, Atmospheric propagation, Atmospheric turbulence, Target detection, Modes of laser operation, Wave propagation, Speckle pattern

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Proceedings Article | 6 August 1997 Paper

Linear FM chirp pulse compression ladar receiver operating characteristic: "maximum of M Rayleighs" statistics

Douglas Youmans, David Fluckiger

Proceedings Volume 3065, (1997) https://doi.org/10.1117/12.281012

KEYWORDS: Doppler effect, Speckle, LIDAR, Monte Carlo methods, Fermium, Frequency modulation, Linear filtering, Radar, Receivers, Picosecond phenomena

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Proceedings Article | 14 November 1996 Paper

Digital image processing system for a high-powered CO2 laser radar

Francis Corbett, Michael Groden, Gordon Dryden, George Pfeiffer, Robert Boos, Douglas Youmans

Proceedings Volume 2847, (1996) https://doi.org/10.1117/12.258240

KEYWORDS: Signal processing, LIDAR, Digital signal processing, Doppler effect, Image processing, Target acquisition, Data acquisition, Detection and tracking algorithms, Imaging systems, Signal detection

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Proceedings Article | 29 March 1996 Paper

Theoretical and Monte Carlo analyses of the range-Doppler imaging capabilities of mode-locked CO2 ladars

Douglas Youmans, Francis Corbett, Gordon Dryden, Mark Kovacs

Proceedings Volume 2702, (1996) https://doi.org/10.1117/12.236893

KEYWORDS: Doppler effect, Carbon dioxide lasers, Mode locking, LIDAR, Pulsed laser operation, Modes of laser operation, Carbon dioxide, Deconvolution, Monte Carlo methods, Digital filtering

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Proceedings Article | 16 June 1995 Paper

Laser radar technology for airborne theater missile defense

Philip Cassady, Ronald Murata, Sean McKenna, M. John Yoder, William Keicher, Philip Blumenau, Daniel Leslie, Douglas Youmans

Proceedings Volume 2472, (1995) https://doi.org/10.1117/12.212029

KEYWORDS: Signal to noise ratio, LIDAR, Target detection, Optical parametric oscillators, Laser systems engineering, Carbon dioxide lasers, Interference (communication), Signal detection, Scintillation, Missiles

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Proceedings Article | 17 April 1995 Paper

Atmospheric effects on eye-safe airborne laser radar

Daniel Leslie, Douglas Youmans

Proceedings Volume 2375, (1995) https://doi.org/10.1117/12.206988

KEYWORDS: LIDAR, Scintillation, Turbulence, Absorption, Atmospheric propagation, Atmospheric particles, Wave propagation, Aerosols, Laser systems engineering, Atmospheric modeling

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Proceedings Article | 23 September 1994 Paper

Dust-cloud density estimation using a single wavelength lidar

Douglas Youmans, Richard Garner, Kent Petersen

Proceedings Volume 2271, (1994) https://doi.org/10.1117/12.188145

KEYWORDS: Clouds, LIDAR, Sensors, Backscatter, Aerosols, Particles, Scattering, Refractive index, Signal to noise ratio, Laser scattering

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Proceedings Article | 1 June 1992 Paper

Avalanche photodiode detection statistics for direct-detection laser radar

Douglas Youmans

Proceedings Volume 1633, (1992) https://doi.org/10.1117/12.59115

KEYWORDS: Photons, Signal detection, Avalanche photodetectors, LIDAR, Electrons, Interference (communication), Signal processing, Radar signal processing, Sensors, Avalanche photodiodes

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Proceedings Article | 1 August 1991 Paper

Lidar backscatter calculations for solid-sphere and layered-sphere aerosols

Douglas Youmans

Proceedings Volume 1416, (1991) https://doi.org/10.1117/12.43721

KEYWORDS: Aerosols, Backscatter, Scattering, LIDAR, Atmospheric particles, Water, Refractive index, Optical spheres, Dielectrics, Waveguides

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Proceedings Article | 1 May 1990 Paper

Laser radar speckle and glint statistics: illustrations using AMOR data

Douglas Youmans

Proceedings Volume 1222, (1990) https://doi.org/10.1117/12.18367

KEYWORDS: LIDAR, Optical filters, Filtering (signal processing), Bandpass filters, Oscillators, Optical spheres, Doppler effect, Speckle, Signal processing, Sensors

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