Mr. Steven E. Johnson Profile

Steven E. Johnson

Research Scientist

SPIE Involvement:

Author

Publications (13)

Proceedings Article | 20 May 2013 Paper

Foliage penetration optimization for Geiger-mode avalanche photodiode lidar

Steven Johnson

Proceedings Volume 8731, 87310C (2013) https://doi.org/10.1117/12.2018911

KEYWORDS: Target detection, LIDAR, Signal detection, Laser energy, Interference (communication), Pulsed laser operation, Photodetectors, Avalanche photodiodes, Reflectivity, Avalanche photodetectors

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SPIE Journal Paper | 1 November 2009

Effect of target surface orientation on the range precision of laser detection and ranging systems

Steven Johnson

JARS, Vol. 3, Issue 01, 033564, (November 2009) https://doi.org/10.1117/12.10.1117/1.3271047

KEYWORDS: LIDAR, Signal to noise ratio, Pulsed laser operation, Imaging systems, Laser beam propagation, Signal processing, Receivers, 3D acquisition, Gaussian pulse, Laser systems engineering

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SPIE Journal Paper | 1 June 2007

Performance comparison between orthogonal subspace projection and the constrained signal detector

Steven Johnson

OE, Vol. 46, Issue 06, 067005, (June 2007) https://doi.org/10.1117/12.10.1117/1.2749708

KEYWORDS: Sensors, Signal detection, Signal to noise ratio, Target detection, Hyperspectral imaging, Hyperspectral target detection, Optical engineering, Reflectivity, Image processing, Remote sensing

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Proceedings Article | 7 May 2007 Paper

Adaptive constrained signal detector for hyperspectral images

Steven Johnson, Michael Eismann

Proceedings Volume 6565, 656505 (2007) https://doi.org/10.1117/12.720766

KEYWORDS: Signal detection, Sensors, Hyperspectral imaging, Target detection, Detection and tracking algorithms, Hyperspectral target detection, Signal to noise ratio, Algorithm development, Expectation maximization algorithms, Reflectivity

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Proceedings Article | 4 May 2007 Paper

Dead-time effects on geiger-mode APD performance

Phillip Gatt, Steven Johnson, Terry Nichols

Proceedings Volume 6550, 65500I (2007) https://doi.org/10.1117/12.724773

KEYWORDS: Signal detection, Signal to noise ratio, Sensors, Photodetectors, Interference (communication), Quantum efficiency, LIDAR, Detection theory, Avalanche photodetectors, Monte Carlo methods

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SPIE Journal Paper | 1 July 2006

Optimal target detection for hyperspectral images with uniform backgrounds

Steven Johnson

OE, Vol. 45, Issue 07, 076202, (July 2006) https://doi.org/10.1117/12.10.1117/1.2227366

KEYWORDS: Sensors, Hyperspectral imaging, Target detection, Signal detection, Hyperspectral target detection, Detection and tracking algorithms, Sensor performance, Signal to noise ratio, Optical engineering, Imaging systems

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Proceedings Article | 13 September 2004 Paper

Range precision of direct-detection laser radar systems

Steven Johnson, Terry Nichols, Philip Gatt, T.J. Klausutis

Proceedings Volume 5412, (2004) https://doi.org/10.1117/12.553991

KEYWORDS: Signal to noise ratio, LIDAR, Logic, Speckle, Data modeling, Monte Carlo methods, Interference (communication), Sensors, Signal detection, Error analysis

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Proceedings Article | 21 August 2003 Paper

Analysis of Geiger-mode APD laser radars

Steven Johnson, Philip Gatt, Terry Nichols

Proceedings Volume 5086, (2003) https://doi.org/10.1117/12.486384

KEYWORDS: Monte Carlo methods, Electrons, LIDAR, Computer simulations, Target detection, Avalanche photodetectors, Interference (communication), Receivers, Sensors, Signal processing

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SPIE Journal Paper | 1 June 2003

Constrained energy minimization and the target-constrained interference-minimized filter

Steven Johnson

OE, Vol. 42, Issue 06, (June 2003) https://doi.org/10.1117/12.10.1117/1.1571062

KEYWORDS: Sensors, Target detection, Multispectral imaging, Signal detection, Interference (communication), Optical filters, Electronic filtering, Signal to noise ratio, Detection and tracking algorithms, Signal attenuation

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Proceedings Article | 29 July 2002 Paper

Theoretical analysis of the impact of local oscillator frequency noise on a laser vibration sensor

Philip Gatt, Steven Johnson, Sammy Henderson, Charley Hale

Proceedings Volume 4723, (2002) https://doi.org/10.1117/12.476406

KEYWORDS: Time metrology, Fourier transforms, Velocity measurements, Thulium, Laser stabilization, Oscillators, Signal processing, Sensors, Servomechanisms, Continuous wave operation

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Proceedings Article | 19 September 2001 Paper

Multifrequency laser radar band selection

Terry Nichols, Steven Johnson, Charles Garvin, Philip Gatt

Proceedings Volume 4377, (2001) https://doi.org/10.1117/12.440120

KEYWORDS: Reflectivity, Signal to noise ratio, LIDAR, Surface plasmons, Detection and tracking algorithms, Metals, Target detection, Signal detection, Receivers, Monte Carlo methods

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Proceedings Article | 20 August 2001 Paper

Detection of constrained signals

Steven Johnson

Proceedings Volume 4381, (2001) https://doi.org/10.1117/12.437050

KEYWORDS: Signal detection, Sensors, Interference (communication), Target detection, Signal to noise ratio, Error analysis, Multispectral imaging, Stochastic processes, Statistical analysis, Matrices

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Proceedings Article | 2 October 1998 Paper

Invariant methods for indexing and relative reconstruction of 3D models using 1D HRR and 2D SAR

Paul Payton, Eamon Barrett, Wolfgang Kober, John Thomas, Steven Johnson

Proceedings Volume 3454, (1998) https://doi.org/10.1117/12.323249

KEYWORDS: Synthetic aperture radar, 3D modeling, Sensors, Scattering, Reconstruction algorithms, Radar, Data modeling, Mathematical modeling, Reflectors, 3D image processing

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Showing 5 of 13 publications

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