Dr. Brent Ware Profile

Dr. Brent Ware

at Jet Propulsion Lab

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Author

Publications (5)

Proceedings Article | 23 July 2008 Paper

Range-gated metrology: an ultra-compact sensor for dimensional stabilization

Oliver Lay, Serge Dubovitsky, Daniel Shaddock, Brent Ware, Christopher Woodruff

Proceedings Volume 7018, 70181A (2008) https://doi.org/10.1117/12.789437

KEYWORDS: Head, Metrology, Signal processing, Sensors, Laser metrology, Multiplexing, Optical fibers, Phase measurement, Interference (communication), Target detection

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Proceedings Article | 28 June 2006 Paper

Terrestrial Planet Finder Interferometer technology status and plans

P. Lawson, A. Ahmed, R. Gappinger, A. Ksendzov, O. Lay, S. Martin, R. Peters, D. Scharf, J. Wallace, B. Ware

Proceedings Volume 6268, 626828 (2006) https://doi.org/10.1117/12.670318

KEYWORDS: Planets, Interferometers, Nulling interferometry, Mid-IR, Robots, Photodynamic therapy, Stars, Spatial resolution, Space telescopes, Telescopes

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Proceedings Article | 31 August 2005 Paper

Architecture trade study for the terrestrial planet finder interferometer

Oliver Lay, Steven Gunter, Louise Hamlin, Curt Henry, Ying-Yong Li, Stefan Martin, George Purcell, Brent Ware, Julie Wertz, M. Charley Noecker

Proceedings Volume 5905, 590502 (2005) https://doi.org/10.1117/12.618136

KEYWORDS: Stars, Space operations, Planets, Spatial resolution, Spectroscopy, Diamond, Control systems, Point spread functions, Nulling interferometry, Interferometers

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The Terrestrial Planet Finder Interferometer (TPF-I) is a space-based NASA mission for the direct detection of Earth-like planets orbiting nearby stars. At the mid-infrared wavelength range of interest, a sun-like star is ~10⁷ times brighter than an earth-like planet, with an angular offset of ~50 mas. A set of formation-flying collector telescopes direct the incoming light to a common location where the beams are combined and detected. The relative locations of the collecting apertures, the way that the beams are routed to the combiner, and the relative amplitudes and phases with which they are combined constitute the architecture of the system. This paper evaluates six of the most promising solutions: the Linear Dual Chopped Bracewell (DCB), X-Array, Diamond DCB, Z-Array, Linear-3 and Triangle architectures. Each architecture is constrained to fit inside the shroud of a Delta IV Heavy launch vehicle using a parametric model for mass and volume. Both single and dual launch options are considered. The maximum separation between spacecraft is limited by stray light considerations. Given these constraints, the performance of each architecture is assessed by modeling the number of stars that can be surveyed and characterized spectroscopically during the mission lifetime, and by modeling the imaging properties of the configuration and the robustness to failures. The cost and risk for each architecture depends on a number of factors, including the number of launches, and mass margin. Quantitative metrics are used where possible. A matrix of the architectures and ~30 weighted discriminators was formed. Each architecture was assigned a score for each discriminator. Then the scores were multiplied by the weights and summed to give a total score for each architecture. The X-Array and Linear DCB were judged to be the strongest candidates. The simplicity of the three-collector architectures was not rated to be sufficient to compensate for their reduced performance and increased risk. The decision process is subjective, but transparent and easily adapted to accommodate new architectures and differing priorities.

Proceedings Article | 16 September 2004 Paper

Modeling the TPF interferometer

Brent Ware, Curt Henry

Proceedings Volume 5497, (2004) https://doi.org/10.1117/12.550265

KEYWORDS: Systems modeling, Thermal modeling, Interferometers, Computer aided design, Control systems, Performance modeling, Integrated modeling, Data modeling, Space operations, Thermography

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Proceedings Article | 19 November 2003 Paper

TPF interferometer performance requirements

Martin Noecker, Oliver Lay, Brent Ware, Serge Dubovitsky

Proceedings Volume 5170, (2003) https://doi.org/10.1117/12.508060

KEYWORDS: Planets, Stars, Modulation, Telescopes, Spatial filters, Signal detection, Interferometers, Phase shift keying, Nulling interferometry, Wavefronts

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