Dr. Grady J. Koch Profile

Dr. Grady J. Koch

Engineer at NASA Langley Research Ctr

SPIE Involvement:

Author

Publications (33)

Proceedings Article | 21 November 2017 Open Access

Development and evaluation of a high sensitivity dial system for profiling atmospheric CO2

S. Ismail, G. Koch, T. Refaat, M. N. Abedin, J. Yu, U. Singh

Proceedings Volume 10566, 105661I (2017) https://doi.org/10.1117/12.2308246

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Proceedings Article | 21 November 2017 Open Access

High-energy, 2µm laser transmitter for coherent wind LIDAR

Upendra Singh, Jirong Yu, Michael Kavaya, Grady Koch

Proceedings Volume 10566, 105661N (2017) https://doi.org/10.1117/12.2308205

KEYWORDS: LIDAR, Transmitters, Ions, Oscillators, Wind energy, Thulium, Fiber amplifiers, Optical amplifiers, Doppler effect, Holmium

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Proceedings Article | 20 October 2014 Paper

2-micron coherent Doppler lidar instrument advancements for tropospheric wind measurement

Mulugeta Petros, U. Singh, J. Yu, M. Kavaya, G. Koch

Proceedings Volume 9246, 92460A (2014) https://doi.org/10.1117/12.2067676

KEYWORDS: LIDAR, Transmitters, Wind energy, Doppler effect, Semiconductor lasers, Crystals, Sensors, Wind measurement, Laser systems engineering, Laser crystals

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Proceedings Article | 9 June 2014 Paper

Offshore wind measurements using Doppler aerosol wind lidar (DAWN) at NASA Langley Research Center

Jeffrey Beyon, Grady Koch, Michael Kavaya

Proceedings Volume 9080, 908011 (2014) https://doi.org/10.1117/12.2050364

KEYWORDS: LIDAR, Radar, Wind measurement, Profiling, Doppler effect, Data acquisition, Aerosols, Algorithm development, Panoramic photography, Backscatter

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SPIE Journal Paper | 20 March 2014 Open Access

Three-dimensional wind profiling of offshore wind energy areas with airborne Doppler lidar

Grady Koch, Jeffrey Beyon, Larry Cowen, Michael Kavaya, Michael Grant

JARS, Vol. 8, Issue 01, 083662, (March 2014) https://doi.org/10.1117/12.10.1117/1.JRS.8.083662

KEYWORDS: LIDAR, Doppler effect, Wind energy, Profiling, Wind measurement, 3D metrology, Clouds, Sensors, Motion measurement, Oceanography

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Proceedings Article | 20 May 2013 Paper

Airborne wind profiling algorithms for the pulsed 2-micron coherent doppler Lidar at NASA Langley Research Center

Jeffrey Beyon, Grady Koch, Michael Kavaya, Taylor Ray

Proceedings Volume 8731, 87310K (2013) https://doi.org/10.1117/12.2015952

KEYWORDS: LIDAR, Profiling, Algorithm development, Doppler effect, Data acquisition, Panoramic photography, Aerosols, Data processing, LabVIEW, Navigation systems

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SPIE Journal Paper | 12 September 2012 Open Access

Side-scan Doppler lidar for offshore wind energy applications

Grady Koch, Jeffrey Beyon, Edward Modlin, Mulugeta Petros, Jirong Yu, Paul Petzar, Steven Woll, Michael Kavaya

JARS, Vol. 6, Issue 01, 063562, (September 2012) https://doi.org/10.1117/12.10.1117/1.JRS.6.063562

KEYWORDS: LIDAR, Wind measurement, Wind energy, Doppler effect, Aerosols, Backscatter, Scanners, Sensors, Calibration, Wind turbine technology

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Proceedings Article | 14 May 2012 Paper

Noise whitening in airborne wind profiling with a pulsed 2-micron coherent doppler lidar at NASA Langley Research Center

Jeffrey Beyon, Grant Arthur, Grady Koch, Michael Kavaya

Proceedings Volume 8379, 83790N (2012) https://doi.org/10.1117/12.919246

KEYWORDS: LIDAR, Profiling, Signal to noise ratio, Data acquisition, Doppler effect, Control systems, Data processing, Digital signal processing, Data transmission, Fourier transforms

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Proceedings Article | 14 May 2012 Paper

Airborne wind profiling with the data acquisition and processing system for a pulsed 2-micron coherent doppler lidar system

Jeffrey Beyon, Grady Koch, Michael Kavaya

Proceedings Volume 8379, 83790M (2012) https://doi.org/10.1117/12.919239

KEYWORDS: LIDAR, Data acquisition, Profiling, Doppler effect, Data processing, Panoramic photography, Aerosols, Laser optics, Pulsed laser operation, Laser applications

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Proceedings Article | 18 November 2010 Paper

Advances in high-energy solid-state 2-micron laser transmitter development for ground and airborne wind and CO2 measurements

Upendra Singh, Jirong Yu, Mulugeta Petros, Songsheng Chen, Michael Kavaya, Bo Trieu, Yingxin Bai, Paul Petzar, Edward Modlin, Grady Koch, Jeffrey Beyon

Proceedings Volume 7832, 783202 (2010) https://doi.org/10.1117/12.865853

KEYWORDS: LIDAR, Oscillators, Wind energy, Wind measurement, Optical amplifiers, Laser development, Pulsed laser operation, Carbon dioxide, Carbon dioxide lasers, Transmitters

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Proceedings Article | 11 November 2010 Paper

Design of control software for a high-speed coherent Doppler lidar system for CO2 measurement

Randal VanValkenburg, Jeffrey Beyon, Grady Koch, Jirong Yu, Upendra Singh, Michael Kavaya

Proceedings Volume 7860, 786008 (2010) https://doi.org/10.1117/12.871967

KEYWORDS: Data acquisition, LIDAR, Carbon dioxide, Doppler effect, Software development, Data storage, Absorption, Control systems, Human-machine interfaces, Picosecond phenomena

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Proceedings Article | 11 November 2010 Paper

Development of the data acquisition and processing system for a pulsed 2-micron coherent Doppler lidar system

Jeffrey Beyon, Grady Koch, Michael Kavaya

Proceedings Volume 7860, 78600A (2010) https://doi.org/10.1117/12.871965

KEYWORDS: Data acquisition, Digital signal processing, LIDAR, Control systems, Doppler effect, Electronics, Laser optics, Scanners, Laser systems engineering, Laser processing

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Proceedings Article | 11 November 2010 Paper

A two micron coherent differential absorption lidar development

Jirong Yu, Mulugeta Petros, Songsheng Chen, Yingxin Bai, Paul Petzar, Bo Trieu, Grady Koch, Jeffrey Beyon, Randal VanValkenburg, Michael Kavaya, Upendra Singh

Proceedings Volume 7860, 786006 (2010) https://doi.org/10.1117/12.873318

KEYWORDS: Carbon dioxide, Absorption, Pulsed laser operation, LIDAR, Continuous wave operation, Carbon dioxide lasers, Transceivers, Heterodyning, Transmitters, Holmium

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Proceedings Article | 11 November 2010 Paper

Energy measurement studies for CO2 measurement with a coherent Doppler lidar system

Jeffrey Beyon, Grady Koch, Jirong Yu, Upendra Singh, Michael Kavaya, Randal VanValkenburg

Proceedings Volume 7860, 786007 (2010) https://doi.org/10.1117/12.871966

KEYWORDS: LIDAR, Carbon dioxide, Interference (communication), Doppler effect, Wind energy, Data acquisition, Profiling, Absorption, Statistical analysis, Carbon dioxide lasers

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SPIE Journal Paper | 1 March 2010

Field testing of a high-energy 2-µm Doppler lidar

Grady Koch, Jeffrey Beyon, Paul Petzar, Mulugeta Petros, Jirong Yu, Bo Trieu, Michael Kavaya, Upendra Singh, Edward Modlin, Bruce Barnes, Belay Demoz

JARS, Vol. 4, Issue 01, 043512, (March 2010) https://doi.org/10.1117/12.10.1117/1.3368726

KEYWORDS: LIDAR, Wind measurement, Clouds, Backscatter, Wind energy, Troposphere, Doppler effect, Aerosols, Pulsed laser operation, Optical amplifiers

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Proceedings Article | 8 October 2009 Paper

Development of the one-sided nonlinear adaptive Doppler shift estimation techniques

Jeffrey Beyon, Grady Koch, Upendra Singh, Michael Kavaya, Judith Serror

Proceedings Volume 7479, 74790M (2009) https://doi.org/10.1117/12.834595

KEYWORDS: Doppler effect, Signal to noise ratio, LIDAR, Data processing, Statistical analysis, Data analysis, Data acquisition, Digital signal processing, Algorithm development, Profiling

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Proceedings Article | 23 October 2008 Paper

Solid-state 2-micron laser transmitter advancement for wind and carbon dioxide measurements from ground, airborne, and space-based lidar systems

Upendra Singh, Michael Kavaya, Grady Koch, Jirong Yu, Syed Ismail

Proceedings Volume 7111, 711104 (2008) https://doi.org/10.1117/12.802740

KEYWORDS: LIDAR, Wind energy, Transceivers, Oscillators, Transmitters, Laser applications, Solid state lasers, Doppler effect, Carbon dioxide, Carbon dioxide lasers

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Proceedings Article | 17 April 2008 Paper

Comparison of theoretical and empirical statistics of wind measurements with validation lidar (VALIDAR)

Jeffrey Beyon, Grady Koch, Michael Kavaya, Maninder Sahota

Proceedings Volume 6968, 69681N (2008) https://doi.org/10.1117/12.776907

KEYWORDS: Statistical analysis, LIDAR, Stochastic processes, Solids, Doppler effect, Signal to noise ratio, Wind measurement, Signal processing, Data acquisition, Error analysis

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SPIE Journal Paper | 1 November 2007

High-energy 2 μm Doppler lidar for wind measurements

Grady Koch, Jeffrey Beyon, Bruce Barnes, Mulugeta Petros, Jirong Yu, Farzin Amzajerdian, Michael Kavaya, Upendra Singh

OE, Vol. 46, Issue 11, 116201, (November 2007) https://doi.org/10.1117/12.10.1117/1.2802584

KEYWORDS: LIDAR, Wind measurement, Doppler effect, Backscatter, Pulsed laser operation, Wind energy, Oscillators, Clouds, Optical engineering, Heterodyning

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Proceedings Article | 26 September 2007 Paper

Requirements and technology advances for global wind measurement with a coherent lidar: a shrinking gap

Michael Kavaya, Jirong Yu, Grady Koch, Farzin Amzajerdian, Upendra Singh, G. David Emmitt

Proceedings Volume 6681, 668106 (2007) https://doi.org/10.1117/12.737428

KEYWORDS: LIDAR, Wind measurement, Wind energy, Doppler effect, Pulsed laser operation, Space telescopes, Laser applications, Aerosols, Telescopes, Laser energy

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Proceedings Article | 16 May 2007 Paper

Signal processing techniques for heterodyne differential absorption lidar

Jeffrey Beyon, Grady Koch, Syed Ismail

Proceedings Volume 6567, 65671N (2007) https://doi.org/10.1117/12.718082

KEYWORDS: LIDAR, Signal processing, Doppler effect, Interference (communication), Absorption, Wind energy, Error analysis, Statistical analysis, Heterodyning, Pulsed laser operation

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SPIE Journal Paper | 1 January 2007

Novel nonlinear adaptive Doppler-shift estimation technique for the coherent Doppler validation lidar

Jeffrey Beyon, Grady Koch

OE, Vol. 46, Issue 01, 016002, (January 2007) https://doi.org/10.1117/12.10.1117/1.2434768

KEYWORDS: Doppler effect, LIDAR, Signal to noise ratio, Wind measurement, Nonlinear optics, Data acquisition, Digital signal processing, Optical engineering, Statistical analysis, Signal processing

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Proceedings Article | 12 December 2006 Paper

Advanced 2-micron solid-state laser for wind and CO2 lidar applications

Jirong Yu, Bo Trieu, Mulugeta Petros, Yingxin Bai, Paul Petzar, Grady Koch, Upendra Singh, Michael Kavaya

Proceedings Volume 6409, 64091C (2006) https://doi.org/10.1117/12.696908

KEYWORDS: Optical amplifiers, LIDAR, Oscillators, Diodes, Laser development, Wind energy, Amplifiers, Semiconductor lasers, Solid state lasers, Transceivers

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Proceedings Article | 19 May 2006 Paper

Noise normalization and windowing functions for VALIDAR in wind parameter estimation

Jeffrey Beyon, Grady Koch, Zhiwen Li

Proceedings Volume 6214, 621404 (2006) https://doi.org/10.1117/12.663420

KEYWORDS: LIDAR, Statistical analysis, Statistical modeling, Data modeling, Signal to noise ratio, Solids, Doppler effect, Data processing, Profiling, Data acquisition

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Proceedings Article | 19 May 2006 Paper

Wind profiling by a coherent Doppler lidar system VALIDAR with a subspace decomposition approach

Jeffrey Beyon, Grady Koch

Proceedings Volume 6236, 623605 (2006) https://doi.org/10.1117/12.663423

KEYWORDS: LIDAR, Signal to noise ratio, Doppler effect, Interference (communication), Data processing, Profiling, Stochastic processes, Signal processing, Backscatter, Aerosols

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Proceedings Article | 19 May 2006 Paper

Resolution study of wind parameter estimates by a coherent Doppler lidar system

Jeffrey Beyon, Grady Koch

Proceedings Volume 6214, 621403 (2006) https://doi.org/10.1117/12.663416

KEYWORDS: LIDAR, Doppler effect, Signal processing, Data processing, Solids, Digital signal processing, Stochastic processes, Interference (communication), Statistical analysis, Signal to noise ratio

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Proceedings Article | 3 May 2006 Paper

Novel nonlinear adaptive Doppler shift estimation technique (NADSET) for the coherent Doppler lidar system VALIDAR

Jeffrey Beyon, Grady Koch

Proceedings Volume 6236, 623601 (2006) https://doi.org/10.1117/12.663431

KEYWORDS: Doppler effect, LIDAR, Signal to noise ratio, Statistical analysis, Wind measurement, Data acquisition, Autoregressive models, Data processing, Control systems, Aerosols

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Proceedings Article | 12 January 2005 Paper

Testbed Doppler wind lidar and intercomparison facility at NASA Langley Research Center

Michael Kavaya, Grady Koch, Mulugeta Petros, Bruce Barnes, Jeffrey Beyon, Farzin Amzajerdian, Jirong Yu, Upendra Singh

Proceedings Volume 5653, (2005) https://doi.org/10.1117/12.579970

KEYWORDS: LIDAR, Doppler effect, Wind measurement, Pulsed laser operation, Laser induced fluorescence, Sensors, Space operations, Wind energy, Laser energy, Atmospheric sensing

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Proceedings Article | 13 September 2004 Paper

Validar: a testbed for advanced 2-micron Doppler lidar

Grady Koch, Mulugeta Petros, Bruce Barnes, Jeffrey Beyon, Farzin Amzajerdian, Jirong Yu, Michael Kavaya, Upendra Singh

Proceedings Volume 5412, (2004) https://doi.org/10.1117/12.542116

KEYWORDS: LIDAR, Pulsed laser operation, Carbon monoxide, Signal processing, Continuous wave operation, Doppler effect, Absorption, Clouds, Oscillators, Gas lasers

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Proceedings Article | 23 December 2003 Paper

Infrared detector characterization for CO2 DIAL measurement

Tamer Refaat, M. Abedin, Grady Koch, Syed Ismail, Upendra Singh

Proceedings Volume 5154, (2003) https://doi.org/10.1117/12.504893

KEYWORDS: Sensors, Carbon monoxide, Indium gallium arsenide, Infrared detectors, LIDAR, Absorption, Signal detection, Indium gallium arsenide antimonide, Gas lasers, Mercury cadmium telluride

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SPIE Journal Paper | 1 June 2003

Automatic laser frequency locking to gas absorption lines

Grady Koch

OE, Vol. 42, Issue 06, (June 2003) https://doi.org/10.1117/12.10.1117/1.1572887

KEYWORDS: Absorption, Semiconductor lasers, Modulation, Laser stabilization, Solid state lasers, Spectroscopy, LIDAR, Pulsed laser operation, Feedback loops, Logic

SPIE Journal Paper | 1 April 2001

Frequency stabilization of a diode laser to absorption lines of water vapor in the 944-nm wavelength region

Grady Koch, Anthony Cook, Colleen Fitzgerald, Amin Dharamsi

OE, Vol. 40, Issue 04, (April 2001) https://doi.org/10.1117/12.10.1117/1.1354628

KEYWORDS: Absorption, Laser stabilization, Semiconductor lasers, Modulation, LIDAR, Pulsed laser operation, Ferroelectric materials, Mirrors, Analog electronics, Fiber lasers

Proceedings Article | 29 March 2000 Paper

Wavelength modulation spectroscopy of water vapor and line center stabilization at 1.462 um for lidar applications

Colleen Fitzgerald, Grady Koch, Audra Bullock, Amin Dharamsi

Proceedings Volume 3945, (2000) https://doi.org/10.1117/12.380525

KEYWORDS: Modulation, Absorption, Laser stabilization, LIDAR, Semiconductor lasers, Spectroscopy, Signal detection, Pulsed laser operation, Ferroelectric materials, Feedback control

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Showing 5 of 33 publications

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