Dr. David S. Flynn Profile

Dr. David S. Flynn

at MacAulay Brown Inc

SPIE Involvement:

Author

Publications (38)

Proceedings Article | 20 May 2005 Paper

Paper

Accuracy of aperture irradiances from a resistor-array projection system

David Flynn, Steven Marlow, R. Sisko, Rhoe Thompson

Proceedings Volume 5785, (2005) https://doi.org/10.1117/12.606266

KEYWORDS: Sensors, Projection systems, Calibration, Image processing, Image sensors, Quantization, Point spread functions, Sensor calibration, Error analysis, Optical sensors

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Proceedings Article | 4 August 2004 Paper

Paper

Formalization and real-time implementation of spatial calibration for a projection system

Breck Sieglinger, David Flynn, W. Larry Herald, Rhoe Thompson

Proceedings Volume 5408, (2004) https://doi.org/10.1117/12.543061

KEYWORDS: Calibration, Projection systems, Sensors, Image processing, Image sensors, Distortion, Field programmable gate arrays, Point spread functions, Software development, Digital signal processing

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Proceedings Article | 4 August 2004 Paper

Paper

Combined calibration and nonuniformity correction of a sensor for improved projector nonuniformity correction

Breck Sieglinger, David Flynn, R. Bryan Sisko, George Goldsmith, Rhoe Thompson, William Meshell, James Norman

Proceedings Volume 5408, (2004) https://doi.org/10.1117/12.543063

KEYWORDS: Sensors, Image processing, Nonuniformity corrections, Black bodies, Calibration, Projection systems, Data modeling, Sensor calibration, Time metrology, Infrared sensors

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Proceedings Article | 12 September 2003 Paper

Paper

Radiometrically calibrating spectrally coupled two-color projectors

David Flynn, Richard Sisko, Breck Sieglinger, Rhoe Thompson

Proceedings Volume 5092, (2003) https://doi.org/10.1117/12.488584

KEYWORDS: Projection systems, Calibration, Sensors, Medium wave, Resistors, Cameras, Quantum well infrared photodetectors, Spectral calibration, Infrared sensors, Black bodies

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Proceedings Article | 12 September 2003 Paper

Paper

Array nonuniformity correction: new procedures designed for difficult measurement conditions

Breck Sieglinger, James Norman, William Meshell, David Flynn, Rhoe Thompson, George Goldsmith

Proceedings Volume 5092, (2003) https://doi.org/10.1117/12.488620

KEYWORDS: Nonuniformity corrections, Projection systems, Sensors, Cameras, Image processing, Image sensors, Cryogenics, Calibration, Infrared radiation, MATLAB

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Proceedings Article | 12 September 2003 Paper

Paper

Impact of distortion removal techniques on band-to-band ratio measurement

Wayne Keen, Brian Smith, David Flynn, Thomas Bergin, Nicholas Rummelt, Rhoe Thompson

Proceedings Volume 5092, (2003) https://doi.org/10.1117/12.488496

KEYWORDS: Distortion, Cameras, Projection systems, Sensors, Error analysis, Infrared radiation, Image processing, Mid-IR, Temperature metrology, Optical alignment

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Proceedings Article | 12 September 2003 Paper

Paper

An analysis of spatial distortion, calibration, and translation effects for a scene projector

Breck Sieglinger, David Flynn, George Goldsmith, Rhoe Thompson

Proceedings Volume 5092, (2003) https://doi.org/10.1117/12.488451

KEYWORDS: Projection systems, Distortion, Sensors, Calibration, Error analysis, Cameras, Image sensors, Long wavelength infrared, Mid-IR, Optical simulations

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Proceedings Article | 12 September 2003 Paper

Paper

A sensitive method for detecting vibration in a scene projector test

Breck Sieglinger, David Flynn, Richard Sisko, Rhoe Thompson

Proceedings Volume 5092, (2003) https://doi.org/10.1117/12.488450

KEYWORDS: Projection systems, Sensors, Image analysis, Cameras, Motion analysis, Image processing, Mid-IR, Long wavelength infrared, Motion measurement, Infrared sensors

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Proceedings Article | 12 September 2003 Paper

Paper

Studies of the spectral crosstalk in two-color IR projector systems

Richard Sisko, David Flynn, Breck Sieglinger, James Norman

Proceedings Volume 5092, (2003) https://doi.org/10.1117/12.488619

KEYWORDS: Cameras, Medium wave, Projection systems, Optical filters, Quantum well infrared photodetectors, Transmittance, Calibration, Infrared imaging, Analytical research, Mathematical modeling

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Proceedings Article | 12 July 2002 Paper

Paper

Correction of spatial distortions in a two-color infrared projection system

Wayne Keen, David Flynn, Thomas Bergin, Breck Sieglinger, Rhoe Thompson

Proceedings Volume 4717, (2002) https://doi.org/10.1117/12.474717

KEYWORDS: Infrared radiation, Projection systems, Cameras, Infrared imaging, Chemical elements, Infrared cameras, Electroluminescence, Visualization, Signal to noise ratio, Optical components

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Proceedings Article | 12 July 2002 Paper

Paper

Numerical quantization effects in KHILS projection systems

David Flynn, Rhoe Thompson, George Goldsmith

Proceedings Volume 4717, (2002) https://doi.org/10.1117/12.474715

KEYWORDS: Projection systems, Quantization, Mid-IR, Long wavelength infrared, Cameras, Raster graphics, Calibration, Resistors, Digital imaging, Temperature metrology

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Proceedings Article | 12 July 2002 Paper

Paper

Parametric assessment of the impact of target scene projection on image processing results

Breck Sieglinger, David Flynn, Rhoe Thompson

Proceedings Volume 4717, (2002) https://doi.org/10.1117/12.474716

KEYWORDS: Sensors, Projection systems, Point spread functions, Signal to noise ratio, Detection and tracking algorithms, Computer simulations, Image processing, Image sensors, Error analysis, Sensor performance

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Proceedings Article | 31 August 2001 Paper

Paper

Characterization of the WISP array performance in ambient and cryogenic operating environments

James Kircher, Eric Olson, Thomas Bergin, David Flynn

Proceedings Volume 4366, (2001) https://doi.org/10.1117/12.438067

KEYWORDS: Cameras, Resistors, Nonuniformity corrections, Cryogenics, Projection systems, Temperature metrology, Field effect transistors, Mid-IR, Calibration, Radiometric resolution

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Proceedings Article | 31 August 2001 Paper

Paper

Method for correcting spatial distortions in an infrared projection system

Wayne Keen, David Flynn, Rhoe Thompson, Albert Bosse

Proceedings Volume 4366, (2001) https://doi.org/10.1117/12.438070

KEYWORDS: Cameras, Projection systems, Infrared imaging, Infrared radiation, Infrared cameras, Collimators, Analytical research, Calibration, Projection devices, Device simulation

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Proceedings Article | 31 August 2001 Paper

Paper

Measurements of the accuracy of projecting point sources with a resistor array projector

David Flynn, Eric Olson, George Goldsmith

Proceedings Volume 4366, (2001) https://doi.org/10.1117/12.438069

KEYWORDS: Cameras, Projection systems, Point spread functions, Sensors, Signal to noise ratio, Error analysis, Image processing, Convolution, Analytical research, Diffraction

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Proceedings Article | 12 July 2000 Paper

Paper

Development of a two-color projection system for the KHILS Vacuum Cold Chamber (KVACC)

David Flynn, Steven Marlow, James Kircher, Eric Glattke, Robert Lee Murrer, John Weir

Proceedings Volume 4027, (2000) https://doi.org/10.1117/12.391692

KEYWORDS: Cameras, Projection systems, Staring arrays, Sensors, Imaging systems, Cryogenics, Infrared radiation, Calibration, Control systems, Temperature metrology

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Proceedings Article | 12 July 2000 Paper

Paper

Radiometric stability of Phase 3 WISP arrays

David Flynn, Steven Marlow, Thomas Bergin, Robert Lee Murrer

Proceedings Volume 4027, (2000) https://doi.org/10.1117/12.391693

KEYWORDS: Annealing, Cameras, Projection systems, Temperature metrology, Calibration, Black bodies, Transmittance, Sensors, Mid-IR, Infrared radiation

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Phase 3 WISP arrays and BRITE arrays are currently being used extensively in many projection systems in many different facilities. These arrays have not been annealed at the factory, and previous tests with the arrays have revealed instabilities in the radiometric output when the arrays are driven at higher voltages. In some applications, the instabilities can be avoided by operating the arrays at lower voltages. In many KHILS applications, it is desirable to drive the arrays with the highest possible voltages to simulate hot missile targets. In one KHILS application (the KHILS VAcuum Cold Chamber, KVACC), the arrays are cooled to near cryogenic temperatures and then driven to high voltages. At lower substrate temperatures, the characteristic responses of the emitters change. Thus, it is important that the response and the stability of the radiometric output of the arrays be well understood for various substrate temperatures, and that the arrays either be annealed or operated below the voltage where the emitters begin to anneal. KHILS has investigated annealing procedures in the past, but there was concern that the annealing procedures themselves -- driving the arrays at high voltages for long times -- would damage the arrays. In order to understand the performance of the arrays better, and to reduce risks associated with driving the arrays at high voltages and operating the arrays at low substrate temperatures, a systematic measurement program was initiated. The radiometric output of new Phase 3 WISP arrays was accurately measured as a function of voltage and time. Arrays designated for testing were driven to the higher voltages and the radiometric output was measured for as long as two hours. Curves indicative of the annealing were observed, and it was determined that the maximum stable output without annealing was about 500 K (MWIR apparent temperature). Blocks of emitters were annealed and tested again. It was determined that stable output of as much as 680 K could be obtained with annealed emitters. KHILS personnel worked with Honeywell Technology Center (HTC) to establish annealing procedures that could be done by HTC in the future. Conclusions to date are that once the emitters are sufficiently annealed, their output does not change further with time, except for some small transient effects that will be discussed in the paper.

Proceedings Article | 12 July 2000 Paper

Paper

Innovations in IR projector arrays

Barry Cole, B. Higashi, Jeff Ridley, J. Holmen, K. Newstrom, C. Zins, K. Nguyen, Steven Weeres, Burgess Johnson, Robert Stockbridge, Robert Lee Murrer, Eric Olson, Thomas Bergin, James Kircher, David Flynn

Proceedings Volume 4027, (2000) https://doi.org/10.1117/12.391704

KEYWORDS: Raster graphics, Cameras, Semiconducting wafers, Projection systems, Mid-IR, Electronics, Capacitors, Annealing, Field effect transistors, Infrared cameras

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Proceedings Article | 19 July 1999 Paper

Paper

Thermo-optical characterization of a low-background infrared chamber and wideband infrared scene projector (WISP) array for hardware-in-the-loop testing

Jack Lippert, David Flynn, Lawrence Jones, James Kircher

Proceedings Volume 3697, (1999) https://doi.org/10.1117/12.352907

KEYWORDS: Cameras, Temperature metrology, Calibration, Helium, Sensors, Black bodies, Projection systems, Infrared radiation, Control systems, Nonuniformity corrections

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Proceedings Article | 19 July 1999 Paper

Paper

Radiometric calibration procedures for a wideband infrared scene projector (WISP)

David Flynn, Steven Marlow, Thomas Bergin, James Kircher

Proceedings Volume 3697, (1999) https://doi.org/10.1117/12.352906

KEYWORDS: Cameras, Projection systems, Calibration, Black bodies, Quantum well infrared photodetectors, Long wavelength infrared, Infrared radiation, Mid-IR, Temperature metrology, Imaging systems

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Proceedings Article | 1 October 1998 Paper

Paper

Superresolution techniques with application to guided munitions

David Flynn, Breck Sieglinger, Bernard Asner, Martin Wehling, Sengvieng Amphay

Proceedings Volume 3460, (1998) https://doi.org/10.1117/12.323226

KEYWORDS: Image processing, Point spread functions, Sensors, Image resolution, Gold, Image sensors, Imaging systems, Super resolution, Image restoration, Passive millimeter wave sensors

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Proceedings Article | 13 July 1998 Paper

Paper

Radiometric, noise, and spatial characterization of the wideband infrared scene projector

Steven Marlow, David Flynn, James Kircher

Proceedings Volume 3368, (1998) https://doi.org/10.1117/12.316363

KEYWORDS: Cameras, Projection systems, Black bodies, Calibration, Temperature metrology, Sensors, Data modeling, Infrared radiation, Analytical research, Nonuniformity corrections

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Proceedings Article | 13 July 1998 Paper

Paper

Projector nonuniformity and spatial effects modeling

David Flynn, Steven Marlow, Eric Olson

Proceedings Volume 3368, (1998) https://doi.org/10.1117/12.316366

KEYWORDS: Projection systems, Cameras, Sensors, Point spread functions, Mathematical modeling, Error analysis, Neodymium, Nonuniformity corrections, Calibration, Spatial resolution

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Proceedings Article | 15 July 1997 Paper

Paper

Timing considerations for integrating a flickerless projector with an imaging sensor

David Flynn, Breck Sieglinger, Robert Lee Murrer, Lawrence Jones, Eric Olson, Allen Andrews, James Gordon

Proceedings Volume 3084, (1997) https://doi.org/10.1117/12.280943

KEYWORDS: Cameras, Projection systems, Device simulation, Resistors, Missiles, Infrared radiation, Imaging systems, Optical sensors, Sensors, Solids

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Proceedings Article | 15 July 1997 Paper

Paper

Prefiltering synthetic images for projection in hardware-in-the-loop systems

David Flynn, Breck Sieglinger, Charles Coker

Proceedings Volume 3084, (1997) https://doi.org/10.1117/12.280961

KEYWORDS: Projection systems, Cameras, Sensors, Imaging systems, Imaging infrared seeker, Image processing, Target acquisition, Image filtering, Spatial resolution, Computer simulations

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Proceedings Article | 15 July 1997 Paper

Paper

Spatial and sampling analysis for a sensor viewing a pixelized projector

Breck Sieglinger, David Flynn, Charles Coker

Proceedings Volume 3084, (1997) https://doi.org/10.1117/12.280952

KEYWORDS: Sensors, Projection systems, Sensor performance, Modulation transfer functions, Spatial frequencies, Staring arrays, Image sensors, Imaging systems, Detection and tracking algorithms, Picosecond phenomena

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Proceedings Article | 17 June 1996 Paper

Paper

Reliability of signature and sensor models

David Chenault, David Flynn

Proceedings Volume 2742, (1996) https://doi.org/10.1117/12.242987

KEYWORDS: Data modeling, Sensors, Reliability, Mathematical modeling, Atmospheric sensing, Computer simulations, Thermal modeling, Motion models, Atmospheric modeling, Algorithm development

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Proceedings Article | 24 May 1996 Paper

Paper

Hardware-in-the-loop simulation using direct signal injection

Breck Sieglinger, David Flynn, Charles Coker

Proceedings Volume 2741, (1996) https://doi.org/10.1117/12.241099

KEYWORDS: Sensors, Image sensors, Computer simulations, Signal processing, Interference (communication), Signal detection, Convolution, Image processing, Projection systems, Imaging systems

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Proceedings Article | 24 May 1996 Paper

Paper

Formalism for analyzing spatial, spectral, and temporal effects in a hardware-in-the-loop system involving a pixelized projector and a passive imaging sensor

David Flynn, Breck Sieglinger

Proceedings Volume 2741, (1996) https://doi.org/10.1117/12.241129

KEYWORDS: Projection systems, Sensors, Cameras, Temporal resolution, Point spread functions, Spatial resolution, Spectral resolution, Diffraction, Optical sensors, Staring arrays

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Proceedings Article | 20 June 1995 Paper

Paper

Minefield image synthesis tool

David Flynn, Douglas Vechinski, Bradley Blume, Abinash Dubey, Ned Witherspoon

Proceedings Volume 2496, (1995) https://doi.org/10.1117/12.211318

KEYWORDS: Cameras, Data modeling, Sun, 3D modeling, Image processing, Reflectivity, Sensors, Image sensors, Imaging systems, Standoff detection

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Proceedings Article | 2 June 1995 Paper

Paper

Irma multisensor predictive signature model

John Watson, David Flynn, Michael Wellfare, Mike Richards, Lee Prestwood

Proceedings Volume 2469, (1995) https://doi.org/10.1117/12.210598

KEYWORDS: Extremely high frequency, Sensors, Human-machine interfaces, LIDAR, Prototyping, Weapons, Sun, Infrared signatures, Reflectivity, Motion models

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Proceedings Article | 2 June 1995 Paper

Paper

Analysis of errors associated with measurement of projector nonuniformity

Breck Sieglinger, David Flynn, Charles Coker

Proceedings Volume 2469, (1995) https://doi.org/10.1117/12.210632

KEYWORDS: Sensors, Projection systems, Error analysis, Nonuniformity corrections, Statistical analysis, Image sensors, Imaging systems, Diffraction, Computer simulations, Time metrology

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Proceedings Article | 2 June 1995 Paper

Paper

Analysis of the effect of projector nonuniformity on the output of a sensor under test

Breck Sieglinger, David Flynn, Charles Coker

Proceedings Volume 2469, (1995) https://doi.org/10.1117/12.210623

KEYWORDS: Sensors, Projection systems, Signal to noise ratio, Interference (communication), Signal detection, Sensor performance, Error analysis, Signal processing, Staring arrays, Analytical research

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Proceedings Article | 2 June 1995 Paper

Paper

Optimization of measurement process variables used in radiance uniformity calibration of the emitter source for the wideband infrared scene projector (WISP)

Charles Malone, David Flynn

Proceedings Volume 2469, (1995) https://doi.org/10.1117/12.210582

KEYWORDS: Nonuniformity corrections, Sensors, Calibration, Interference (communication), Error analysis, Projection systems, Signal to noise ratio, Infrared radiation, Point spread functions, Image sensors

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SPIE Journal Paper | 1 June 1995

Polarized surface scattering expressed in terms of a bidirectional reflectance distribution function matrix

David Flynn, Cliff Alexander

OE, Vol. 34, Issue 06, (June 1995) https://doi.org/10.1117/12.10.1117/12.202105

KEYWORDS: Bidirectional reflectance transmission function, Scattering, Reflectivity, Polarization, Radiative transfer, Solids, Matrices, Electromagnetic scattering, Optical sensors, 3D modeling

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Proceedings Article | 14 September 1994 Paper

Paper

Polarization effects in radiometry

David Flynn, Cliff Alexander

Proceedings Volume 2265, (1994) https://doi.org/10.1117/12.186676

KEYWORDS: Bidirectional reflectance transmission function, Scattering, Polarization, Radiometry, Reflectivity, Polarimetry, Radiative transfer, Electromagnetic scattering theory, Solids, Optical sensors

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Proceedings Article | 31 August 1993 Paper

Paper

Modular all-digital closed-loop simulation for analysis and simulation of strategic interceptors

Mark Finch, David Flynn, Breck Sieglinger, Victoria Franques

Proceedings Volume 1969, (1993) https://doi.org/10.1117/12.154725

KEYWORDS: Sensors, Image sensors, Missiles, Signal processing, Projection systems, Monte Carlo methods, Target detection, Computer simulations, Image processing, Detection and tracking algorithms

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Proceedings Article | 13 August 1993 Paper

Paper

Simulation of a class of in-band scene projectors for evaluation of hardware-in-the-loop testing compatibility and performance

David Flynn, Mark Finch, Breck Sieglinger, Victoria Franques

Proceedings Volume 1967, (1993) https://doi.org/10.1117/12.151033

KEYWORDS: Sensors, Surface plasmons, Projection systems, Image sensors, Computer simulations, Signal processing, Missiles, Quantization, Interference (communication), Scene simulation

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Hardware-in-the-loop (HWIL) testing can be used as an efficient and effective means for analyzing the performance of guided missile systems. Due to the limits of current technologies, components of the simulation are limited in their capability to simulate real-world conditions for certain test articles. One component which is critical in an HWIL system for strategic guided missiles is the scene projection or delivery device. To stimulate imaging JR sensors, this scene projector (SP) typically consists of a pixelized in-band source which can be modulated both spatially and temporally to simulate the radiane scene which would be observed during an actual engagement. The SP is driven by a scene generator which provides scene radiance information to the SP under control of a simulation computer, which determines the field-of-view (FOV) composition based on a simulated engagement. In using such a system, a primary concern is that the SP is able to create a scene which produces the proper response in the observing sensor. Another effect which bears examination is the SFs projection method, such as scanning an in-band source to cover the projection FOV. The detailed interaction between the modulated source and the timing of the sensor's detection, integration, and readout processes may cause unrealistic or unexpected sensor behavior. In order to assess the compatibility of a specific sensor viewing a specific SP, a detailed simulation has been developed by Nichols Research Corporation under the direction of the Guided Interceptor Technology Branch (WL/MNSI) of the USAF Wright Laboratory Armament Directorate. This simulation was designed primarily to address issues related to scene projector usage in the Kinetic Kill Vehicle Hardware in the Loop Simulator (KHILS) facility at Eglin AFB, Florida. The simulation allows the user to define: the spatial response of the sensor; the spatial properties of the SP (i.e. the radiance distribution arising from a commanded impulse); the illumination timing of the SP, such as scan format, persistence, etc.; and the integration and readout timing of the sensor. Given sampled values of these response functions, and sampled values of the desired radiance scene, the SP simulation computes the detector outputs in the form of a sensed image. This output image can help to assess the suitability of using the modeled SP for testing the modeled sensor by illustrating potential mismatches. It also provides a means to predict the performance to be expected from this module of the HWIL simulation for a particular test scenario. This paper derives equations which express the sensor output as a function of the input scene, the spatial and temporal response functions of the sensor and the SP, and the spectral response functions of the sensor and SP. Assumptions which affect the implementation and the generality of application are stated and discussed. Results and conclusions are presented for a specific application which illustrate the utility of the simulation

Showing 5 of 38 publications

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