Dr. Arno G. Ledebuhr Profile

Dr. Arno G. Ledebuhr

Physicist Principal at Lockheed Martin Space Systems Co

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Author

Publications (9)

Proceedings Article | 16 June 1995 Paper

HiRes camera and lidar ranging system for the Clementine mission

Arno Ledebuhr, Joseph Kordas, Isabella Lewis, Michael Richardson, George Cameron, W. Travis White, Douglas Dobie, Wesley Strubhar, Thomas Tassinari, Douglas Sawyer, Michael Shannon, Lyn Pleasance, Albert Lieber, Peter Trost, David Doll, Michael Grote

Proceedings Volume 2472, (1995) https://doi.org/10.1117/12.212030

KEYWORDS: Cameras, Optical filters, Imaging systems, Telescopes, LIDAR, Sensors, Receivers, Space telescopes, Electronics, Image intensifiers

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Lawrence Livermore National Laboratory developed a space-qualified high resolution (HiRes) imaging LIDAR (light detection and ranging) system for use on the DoD Clementine mission. The Clementine mission provided more than 1.7 million images of the moon, earth, and stars, including the first ever complete systematic surface mapping of the moon from the ultra-violet to near-infrared spectral regions. This article describes the Clementine HiRes/LIDAR system, discusses design goals and preliminary estimates of on-orbit performance, and summarizes lessons learned in building and using the sensor. The LIDAR receiver system consists of a HiRes imaging channel which incorporates an intensified multi-spectral visible camera combined with a laser ranging channel which uses an avalanche photo-diode for laser pulse detection and timing. The receiver was bore sighted to a lightweight McDonnell-Douglas diode-pumped Nd:YAG laser transmitter that emitted 1.06 micrometer wavelength pulses of 200 mJ/pulse and 10 ns pulse-width. The LIDAR receiver uses a common F/9.5 Cassegrain telescope assembly. The optical path of the telescope is split using a color-separating beamsplitter. The imaging channel incorporates a filter wheel assembly which spectrally selects the light which is imaged onto a custom 12 mm gated image intensifier fiber-optically coupled into a 384 multiplied by 276 pixel frame transfer CCD FPA. The image intensifier was spectrally sensitive over the 0.4 to 0.8 micrometer wavelength region. The six-position filter wheel contained 4 narrow spectral filters, one broadband and one blocking filter. At periselene (400 km) the HiRes/LIDAR imaged a 2.8 km swath width at 20-meter resolution. The LIDAR function detected differential signal return with a 40-meter range accuracy, with a maximum range capability of 640 km, limited by the bit counter in the range return counting clock. The imagery from the HiRes is most useful for smaller scale topography studies, while the LIDAR data is used for global terrain and inferred gravity maps.

Proceedings Article | 12 June 1995 Paper

Star tracker stellar compass for the Clementine mission

Joseph Kordas, Isabella Lewis, Bruce Wilson, Darron Nielsen, Hye-Sook Park, Robert Priest, Robert Hills, Michael Shannon, Arno Ledebuhr, Lyn Pleasance

Proceedings Volume 2466, (1995) https://doi.org/10.1117/12.211494

KEYWORDS: Stars, Cameras, Space operations, Charge-coupled devices, CCD cameras, Staring arrays, Electronics, Sensors, Detection and tracking algorithms, Interfaces

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Proceedings Article | 6 June 1995 Paper

Clementine longwave infrared camera

Robert Priest, Isabella Lewis, Noel Sewall, Hye-Sook Park, Michael Shannon, Arno Ledebuhr, Lyn Pleasance, Mark Massie, Karen Metschuleit

Proceedings Volume 2475, (1995) https://doi.org/10.1117/12.211288

KEYWORDS: Cameras, Long wavelength infrared, Staring arrays, Cryocoolers, Space operations, Electronics, Sensors, Calibration, Infrared cameras, Control systems

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Proceedings Article | 6 June 1995 Paper

Near-infrared camera for the Clementine mission

Robert Priest, Isabella Lewis, Noel Sewall, Hye-Sook Park, Michael Shannon, Arno Ledebuhr, Lyn Pleasance, Mark Massie, Karen Metschuleit

Proceedings Volume 2475, (1995) https://doi.org/10.1117/12.211287

KEYWORDS: Cameras, Near infrared, Staring arrays, Cryocoolers, Space operations, Electronics, Sensors, Calibration, Optical filters, Control systems

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Proceedings Article | 2 June 1995 Paper

UV/visible camera for the Clementine mission

Joseph Kordas, Isabella Lewis, Robert Priest, W. Travis White, Darron Nielsen, Hye-Sook Park, Bruce Wilson, Michael Shannon, Arno Ledebuhr, Lyn Pleasance

Proceedings Volume 2478, (1995) https://doi.org/10.1117/12.210943

KEYWORDS: Cameras, Optical filters, Charge-coupled devices, Calibration, Space operations, Electronics, Sensors, CCD cameras, Imaging systems, Aluminum

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Proceedings Article | 1 June 1992 Paper

Dynamic range of intensified CCDs for pulsed laser radar applications

Peter Trost, Albert Lieber, Arno Ledebuhr, Richard Wyeth, Joseph Kordas

Proceedings Volume 1633, (1992) https://doi.org/10.1117/12.59217

KEYWORDS: LIDAR, Microchannel plates, Image intensifiers, Charge-coupled devices, Information operations, CCD cameras, Imaging systems, Fiber optics, Receivers, Signal to noise ratio

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Proceedings Article | 1 December 1991 Paper

Stray-light reduction in a WFOV star tracker lens

Isabella Lewis, Arno Ledebuhr, Timothy Axelrod, Scott Ruddell

Proceedings Volume 1530, (1991) https://doi.org/10.1117/12.50520

KEYWORDS: Stray light, Stars, Light scattering, Scattering, Scatter measurement, Optical testing, Sensors, Interference (communication), Sun, Light

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Proceedings Article | 1 December 1991 Paper

Stray-light implications of scratch/dig specifications

Isabella Lewis, Arno Ledebuhr, Marvin Bernt

Proceedings Volume 1530, (1991) https://doi.org/10.1117/12.50493

KEYWORDS: Scattering, Light scattering, Laser scattering, Scatter measurement, Optical testing, Reflectivity, Visualization, Stray light, Inspection, Bidirectional reflectance transmission function

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Proceedings Article | 1 July 1991 Paper

Wide-field-of-view star tracker camera

Isabella Lewis, Arno Ledebuhr, Timothy Axelrod, Joseph Kordas, Robert Hills

Proceedings Volume 1478, (1991) https://doi.org/10.1117/12.45617

KEYWORDS: Stars, Cameras, Sensors, Navigation systems, Prototyping, CCD image sensors, Image sensors, Fiber optics, Detection and tracking algorithms, CCD cameras

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Showing 5 of 9 publications

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