Mr. Charles P. McGrath Profile

Charles P. McGrath

Scientist

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Publications (6)

Proceedings Article | 20 March 2003 Paper

Remote sensing support for the target acquisition weapons software (TAWS)

Charles McGrath

Proceedings Volume 4884, (2003) https://doi.org/10.1117/12.462480

KEYWORDS: Atmospheric modeling, Transmittance, Sensors, Remote sensing, Electro optical modeling, Temperature metrology, Performance modeling, Atmospheric sensing, Black bodies, Target detection

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SPIE Journal Paper | 1 August 2001

Electro-optical propagation assessment in coastal environments (EOPACE): summaryand accomplishments

Douglas Jensen, Stuart Gathman, Carl Zeisse, Charles McGrath, Gerrit de Leeuw, Michael Smith, Paul Frederickson, Kenneth Davidson

OE, Vol. 40, Issue 08, (August 2001) https://doi.org/10.1117/12.10.1117/1.1387985

KEYWORDS: Aerosols, Atmospheric modeling, Electro optical modeling, Satellites, Ocean optics, Atmospheric particles, Surf zone, Coastal modeling, Electro optics, Atmospheric propagation

Proceedings Article | 3 November 1998 Paper

Ocean background modeling for target acquisition weather software (TAWS)

Charles McGrath

Proceedings Volume 3433, (1998) https://doi.org/10.1117/12.330211

KEYWORDS: Electro optical modeling, Coastal modeling, Data modeling, Sensors, Systems modeling, Atmospheric modeling, Warfare, Atmospheric propagation, Clouds, Target acquisition

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WIN-EOTDA is a Navy strike warfare mission-planning tool based on the original Electrooptical Tactical Decision Aid (EOTDA) developed by the US Air Force in the 1980s. The WIN- EOTDA has been adapted to US Navy applications by adding a MS-Windows graphical user interface, Navy sensors and targets, and an improved ocean background model, atmospheric transmission model and sky radiance mode. Future requirements for the WIN-EOTDA include the addition of scene rendering capability, modeling in the midwave IR band, and scenarios involving near surface sensor heights. This report uses data collected during the Electrooptical Propagation Assessment in Coastal Environments (EOPACE) trials to discuss the current Navy improvements to the original ocean background model as well as improvements needed to meet the future Naval requirements. The current improvements involve replacing the original semi-empirical water background model with a combination of the MODTRAN sky radiance model and the SeaRad ocean radiance model. The SeaRad model is a rigorous geometric capillary wave model based on the Cox and Munk wave-slope statistical model. WHile the SeaRad model is suitable for moderate wind, high altitude, slant-path sensor configurations, it is inadequate for the near-surface scenarios required for the future replacement for the WIN- EOTDA. A near-surface water background model must include wave swell and effects of whitecaps. It must be coupled with an atmospheric model that includes refraction and scintillation effects. This report discusses the current improvements to the WIN-EOTDA and how algorithms used for IR Search and Track development, such as in IRTool, could be adapted to meet future requirements. The eventual replacement for WIN-EOTDA is a software program under development by the US Air Force called Target Acquisition Weather Software. The results of this case study indicate the combined SeaRad and MODTRAN modifications improve ocean background prediction performance for the high-altitude strike warfare view angles. This addition of a clutter model, such as in IRTool, may make the ocean background model suitable for surface warfare and near-horizon scenarios. However, this hypothesis warrants further investigation.

Proceedings Article | 23 September 1997 Paper

Improving the EOTDA ocean background model

Charles McGrath, Gregory Badzik

Proceedings Volume 3125, (1997) https://doi.org/10.1117/12.279020

KEYWORDS: Electro optical modeling, Atmospheric modeling, Sensors, Coastal modeling, Systems modeling, Data modeling, Performance modeling, Water, Electro optics, Warfare

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Proceedings Article | 14 October 1996 Paper

Comparison of MAPTIP FLIR detection ranges to the EOTDA prediction model

Charles McGrath, Piet Schwering, Peter Fritz

Proceedings Volume 2828, (1996) https://doi.org/10.1117/12.254207

KEYWORDS: Atmospheric modeling, Forward looking infrared, Sensors, Performance modeling, Coastal modeling, Data modeling, Aerosols, Thermography, Sensor performance, Water

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Proceedings Article | 15 June 1995 Paper

Dependence of mid- and far-infrared sea radiances on viewing altitude

Kathleen Littfin, Charles McGrath, Douglas Jensen, Herbert Hughes

Proceedings Volume 2471, (1995) https://doi.org/10.1117/12.211924

KEYWORDS: Temperature metrology, Thermography, Absorption, Atmospheric modeling, Transmittance, Far infrared, Aerosols, Thermal modeling, Atmospheric particles, Calibration

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