Ms. Jennifer Hegarty Profile

Jennifer Hegarty

at Ontar Corporation

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Author

Publications (3)

Proceedings Article | 2 May 2007 Paper

New weather depiction technology for night vision goggle (NVG) training: 3D virtual/augmented reality scene-weather-atmosphere-target simulation

Michelle Folaron, Martin Deacutis, Jennifer Hegarty, Richard Vollmerhausen, John Schroeder, Frank Colby

Proceedings Volume 6557, 65570C (2007) https://doi.org/10.1117/12.718639

KEYWORDS: Atmospheric modeling, Heads up displays, 3D acquisition, Night vision goggles, Visualization, 3D modeling, Computer simulations, Virtual reality, DirectX, Light sources and illumination

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US Navy and Marine Corps pilots receive Night Vision Goggle (NVG) training as part of their overall training to maintain the superiority of our forces. This training must incorporate realistic targets; backgrounds; and representative atmospheric and weather effects they may encounter under operational conditions. An approach for pilot NVG training is to use the Night Imaging and Threat Evaluation Laboratory (NITE Lab) concept. The NITE Labs utilize a 10' by 10' static terrain model equipped with both natural and cultural lighting that are used to demonstrate various illumination conditions, and visual phenomena which might be experienced when utilizing night vision goggles. With this technology, the military can safely, systematically, and reliably expose pilots to the large number of potentially dangerous environmental conditions that will be experienced in their NVG training flights. A previous SPIE presentation described our work for NAVAIR to add realistic atmospheric and weather effects to the NVG NITE Lab training facility using the NVG - WDT(Weather Depiction Technology) system (Colby, et al.). NVG -WDT consist of a high end multiprocessor server with weather simulation software, and several fixed and goggle mounted Heads Up Displays (HUDs). Atmospheric and weather effects are simulated using state-of-the-art computer codes such as the WRF (Weather Research &mgr; Forecasting) model; and the US Air Force Research Laboratory MODTRAN radiative transport model. Imagery for a variety of natural and man-made obscurations (e.g. rain, clouds, snow, dust, smoke, chemical releases) are being calculated and injected into the scene observed through the NVG via the fixed and goggle mounted HUDs. This paper expands on the work described in the previous presentation and will describe the 3D Virtual/Augmented Reality Scene - Weather - Atmosphere - Target Simulation part of the NVG - WDT. The 3D virtual reality software is a complete simulation system to generate realistic target - background scenes and display the results in a DirectX environment. This paper will describe our approach and show a brief demonstration of the software capabilities. The work is supported by the SBIR program under contract N61339-06-C-0113.

Proceedings Article | 1 September 2006 Paper

New weather depiction technology for night vision goggle (NVG) training

Scott Theleman, Jennifer Hegarty, Richard Vollmerhausen, Courtney Scott, John Schroeder, Frank Colby, S. Napier

Proceedings Volume 6303, 63030F (2006) https://doi.org/10.1117/12.682217

KEYWORDS: Heads up displays, Atmospheric modeling, Night vision goggles, Fiber optic gyroscopes, Head, Clouds, Visual process modeling, Computer simulations, Data modeling, Image processing

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Proceedings Article | 18 October 2004 Paper

A user-friendly software package for predicting atmospheric turbulence effects on laser beam propagation

Jennifer Hegarty, John Schroeder, Larry Andrews, Ronald Phillips

Proceedings Volume 5552, (2004) https://doi.org/10.1117/12.558698

KEYWORDS: Atmospheric modeling, Turbulence, Atmospheric propagation engineering, Scintillation, Laser beam propagation, Atmospheric turbulence, Wave propagation, Atmospheric propagation, Atmospheric optics, Atmospheric scintillation

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