Engineering topics

Chen, C. W.

Publications and source records attributed to Chen, C. W..

10 records

NASA NTRS2012

Definitive Mineralogy from the Mars Science Laboratory Chemin Instrument

The Mars Science Laboratory (MSL) rover will land in Gale Crater on Mars in August 2012. The planned landing site is an alluvial fan near the base of the crater's central mound. Orbital remote sensing of this 5 km high mound indicates the presence of hydrated sulfates, interstratified with smectite and hematite-bearing layers. Minerals formed in an aqueous environment are of particular interest given that water is a fundamental ingredient of living systems and that MSL's prime science objective is to investigate martian habitability.

Yen, A. S.↗

NASA NTRS2004

Performance assessment of along-track interferometry for detecting ground moving targets

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synthetic aperture radar along-track interferometr↗

NASA NTRS2004

Modified polar format algorithm for processing spaceborne SAR data

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synthetic aperture radar polar format processing↗

NASA NTRS2004

Height reconstruction techniques for synthetic aperture lidar systems

We examine height-reconstruction techniques for airborne synthetic aperture lidar (SAL) sensors imaging the ground surface.

synthetic aperture lidar SAL monopulse interferome↗

NASA NTRS2003

Observational architectures for enabling earthquake forecasting

Observational architectures for allowing the eventual forecasting of earthquakes are discussed.

interferometric synthetic aperture radar↗

NASA NTRS2003

Requirements and observational architectures for monitoring crustal deformation from space

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earthquake forecasting InSAR interferometric synth↗

NASA NTRS2001

Phase unwrapping for large InSAR data sets through statistical cost tiling

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phase unwrapping InSAR interferometry tiling↗

NASA NTRS1984

Efficiency of Reflection Gratings

Dichromated gelatin plates evaluated as optical elements for phase-volume holography.

Chen, C. W.↗

NASA NTRS1984

Holographic Twyman-Green Interferometer

Off-axis Fresnel zone plate used to obtain fringe visibility close to unity. Holographic Twyman-Green Interferometer (HTG) employs off-axis Fresnel zone plate (OFZP) as beam splitter and beam diverger in place of two separate elements that perform those functions in conventional TwymanGreen interferometer.

Chen, C. W.↗

NASA NTRS1982

Holographic Twyman-Green interferometer

A dichromated gelatin off-axis Fresnel zone plate was designed, fabricated, and used in a new type of interferometer for optical metrology. This single hologram optical element combines the functions of a beam splitter, beam diverger, and aberrated null lens. Data presented show the successful application for an interferometric test of an f/6, 200-mm diam parabolic mirror.

Chen, C. W.↗