Mr. Winfried Posselt Profile

Winfried Posselt

at OHB-System AG

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 11 June 2021 Open Access

FORUM payload study for phase A/B1 by a consortium led by OHB System AG and TAS-UK

S. Fray, M. Lippa, E. Semmler, W. Posselt, Ph. Giaccari, C. Mastrandrea, Uwe Zeitner, Th. Fluegel-Paul, S. Sadlowski, Th. Kaesebier, Ch. Monte, M. Kehrt

Proceedings Volume 11852, 1185225 (2021) https://doi.org/10.1117/12.2599356

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Proceedings Article | 11 June 2021 Open Access

Far infrared Fourier transform spectrometer breadboard activities for the FORUM mission, ESA’s 9th Earth Explorer

C. Pachot, B. Carnicero Domínguez, B. Sierk, F. Mariani, S. Riel, H. Oetjen, G. Rodrigues, S. Ratzsch, D. Redlich, W. Posselt, E. Alberti, C. Mastrandrea, C. Monte, Y. Montembeault, D. Smith, P. Ade, X. Durandi, M. Kolm

Proceedings Volume 11852, 1185224 (2021) https://doi.org/10.1117/12.2599355

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Proceedings Article | 21 November 2017 Open Access

Imaging spectrometers for atmosphere monitoring

Thido Reinert, Heinrich Bovensmann, Ralf Münzenmayer, Stefan Weiss, Winfried Posselt

Proceedings Volume 10567, 105671Y (2017) https://doi.org/10.1117/12.2308078

KEYWORDS: Spectrometers, Aerosols, Sensors, Ozone, Climatology, Atmospheric monitoring, Environmental sensing, Ultraviolet radiation, Environmental monitoring, Clouds

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Proceedings Article | 21 November 2017 Open Access

FTIS compact Fourier transform imaging spectrometer for remote sensing

W. Posselt, K. Holota, H. Tittel, M. Rost, B. Harnisch

Proceedings Volume 10569, 105690N (2017) https://doi.org/10.1117/12.2307904

KEYWORDS: Mirrors, Interferometers, Sensors, Spectroscopy, Remote sensing, Relays, Fourier transforms, Off axis mirrors, Wavefronts, Short wave infrared radiation

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Proceedings Article | 14 October 2005 Paper

Optical design of the near-infrared spectrograph NIRSpec

Jess Köhler, Markus Melf, Winfried Posselt, Wolfgang Holota, Maurice te Plate

Proceedings Volume 5962, 59621V (2005) https://doi.org/10.1117/12.625197

KEYWORDS: Spectroscopy, Optical design, Spectral resolution, Sensors, Distortion, Stars, Optical components, Mirrors, Optical filters, Geometrical optics

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Proceedings Article | 18 August 2005 Paper

Opto-mechanical design of the near-infrared spectrograph NIRSpec

Maurice te Plate, Wolfgang Holota, Winfried Posselt, Jess Koehler, Markus Melf, Giorgio Bagnasco, Pierangelo Marenaci

Proceedings Volume 5904, 59040L (2005) https://doi.org/10.1117/12.620772

KEYWORDS: Mirrors, Silicon carbide, James Webb Space Telescope, Staring arrays, Optical filters, Spectral resolution, Calibration, Content addressable memory, Camera shutters, Image quality

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Proceedings Article | 12 October 2004 Paper

NIRSpec: near-infrared spectrograph for the JWST

Winfried Posselt, Wolfgang Holota, Ernst Kulinyak, Guenther Kling, Thomas Kutscheid, Olivier Le Fevre, Eric Prieto, Pierre Ferruit

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.555659

KEYWORDS: James Webb Space Telescope, Mirrors, Spectrographs, Calibration, Cameras, Staring arrays, Optical filters, Optics manufacturing, Interfaces, Instrument modeling

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Proceedings Article | 29 September 2004 Paper

Prototyping of cryomechanisms for the JWST near-infrared spectrograph (NIRSpec)

Ralph Hofferbert, Dietrich Lemke, Armin Bohm, Ulrich Grozinger, Thomas Henning, Armin Huber, Oliver Krause, Stefan Mertin, Jose Ramos, Ralf-Rainer Rohloff, Georg Luichtel, Kai Weidlich, Gilles Baudin, Winfried Posselt, Ruben Nalbandian, Peter Jensen

Proceedings Volume 5495, (2004) https://doi.org/10.1117/12.550419

KEYWORDS: Mirrors, James Webb Space Telescope, Actuators, Prototyping, Optical filters, Space telescopes, Spectrographs, Linear filtering, Sensors, Astronomical imaging

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Proceedings Article | 10 November 2003 Paper

Cryomechanisms for the instruments MIRI and NIRSpec on the James Webb Space Telescope (JWST)

Ralph Hofferbert, Dietrich Lemke, Ulrich Groezinger, Thomas Henning, Stefan Mertin, Ralf-Rainer Rohloff, Karl Wagner, Gillian Wright, Huib Visser, Josef Katzer, M. Salvasohn, Winfried Posselt, Guy Fargant, Ruben Nalbandian

Proceedings Volume 5152, (2003) https://doi.org/10.1117/12.507420

KEYWORDS: Mirrors, James Webb Space Telescope, Actuators, Picture Archiving and Communication System, Optical components, Optical filters, Calibration, Electronics, Prisms, Spectrographs

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Proceedings Article | 28 July 2000 Paper

Imaging Fourier transform spectrometer for NGST

Winfried Posselt, Gillian Wright, Oliver LeFevre, Koos Cornelisse, Peter Jakobsen

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.393968

KEYWORDS: Fourier transforms, Interferometers, Cameras, Optical filters, Spectroscopy, Mirrors, Sensors, Imaging spectroscopy, Spectroscopes, Telescopes

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Proceedings Article | 28 July 2000 Paper

ESA NGST integral field and multiobject spectrograph slicer system

Robert Content, Jeremy Allington-Smith, David Robertson, Oliver LeFevre, Eric Prieto, Bernard Delabre, Winfried Posselt

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.394052

KEYWORDS: Spectrographs, Mirrors, Space telescopes, Sensors, Lawrencium, Telescopes, Molybdenum, Iterated function systems, Silicon, Astronomical imaging

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Proceedings Article | 28 July 2000 Paper

Filter wheel cameras for the NGST

Winfried Posselt, Oliver LeFevre, Gillian Wright, Pierre-Olivier Lagage, Koos Cornelisse, Peter Jakobsen

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.394051

KEYWORDS: Optical filters, Cameras, Galactic astronomy, Stars, Detector arrays, Mirrors, Sensors, Telescopes, Mid-IR, Optical design

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Proceedings Article | 28 July 2000 Paper

MIRIFS: a mid-IR integral field spectrograph for NGST

Martyn Wells, Eli Ettedgui-Atad, Peter Hastings, Winfried Posselt, Gillian Wright, Pierre-Olivier Lagage, Oliver LeFevre

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.393960

KEYWORDS: Mirrors, Spectrographs, Spectroscopy, Optical filters, Sensors, Spectral resolution, Telescopes, Optical design, Image filtering, Mid-IR

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Proceedings Article | 31 December 1997 Paper

HRIS technology development results and their implementation in future hyperspectral imagers

Bernd Harnisch, Marino Fabbricotti, Roland Meynart, Bernd Kunkel, Winfried Posselt, Elke Schmidt, Robert Davancens, Olivier Donnadieu, Olivier Saint-Pe, Dave Charlton, Liz Sankus, Giuseppe Basile, L. Calamei, Juergen Schweizer, Hans Juranek, Rolf Sand, Horst Schwarzer, Karl-Heinz Suemnich, Philip Slater

Proceedings Volume 3221, (1997) https://doi.org/10.1117/12.298107

KEYWORDS: Hyperspectral imaging, Imaging systems, Spectroscopy, Decision support systems, Prisms, Image resolution, Spectral resolution, Infrared spectroscopy, Short wave infrared radiation, Detector arrays

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Proceedings Article | 23 May 1997 Paper

Hyperspectral imager survey and developments for scientific and operational land processes monitoring applications

Bernd Kunkel, Winfried Posselt, Elke Schmidt, Umberto Del Bello, Bernd Harnisch, Roland Meynart

Proceedings Volume 3107, (1997) https://doi.org/10.1117/12.274730

KEYWORDS: Spectrometers, Imaging systems, Prisms, Short wave infrared radiation, Hyperspectral imaging, Calibration, Decision support systems, Staring arrays, Vegetation, Radio optics

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Proceedings Article | 27 January 1997 Paper

PRISM on-board characterization

Winfried Posselt, Daniel Lobb, Philip Slater, Umberto Del Bello, Roland Meynart

Proceedings Volume 2957, (1997) https://doi.org/10.1117/12.265442

KEYWORDS: Diffusers, Calibration, Prisms, Sun, Mirrors, Black bodies, Sensors, Mirror pointing, Reflectivity, Short wave infrared radiation

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Proceedings Article | 27 January 1997 Paper

Processes research by an imaging space mission

Winfried Posselt, Bernd Kunkel, Elke Schmidt, Umberto Del Bello, Roland Meynart

Proceedings Volume 2957, (1997) https://doi.org/10.1117/12.265425

KEYWORDS: Prisms, Short wave infrared radiation, Thermography, Calibration, Imaging systems, Electronics, Spectroscopy, Mirrors, Radiometric resolution, Interfaces

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Proceedings Article | 23 August 1996 Paper

Development of design concepts for the PRISM (process research by an imaging space mission) instrument

Daniel Lobb, Umberto Del Bello, Bernd Kunkel, Winfried Posselt, Olivier Saint-Pe

Proceedings Volume 2774, (1996) https://doi.org/10.1117/12.246674

KEYWORDS: Prisms, Mirrors, Spectrometers, Short wave infrared radiation, Sensors, Satellites, Telescopes, Spatial resolution, Spectral resolution, Aerospace engineering

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Proceedings Article | 24 November 1995 Paper

PRISM (processes research by an imaging spaceborne mission): high-resolution hyperspectral imager for scientific land processes monitoring applications

Bernd Kunkel, Fritz Blechinger, Reinhold Lutz, Winfried Posselt, Umberto Del Bello, Roland Meynart, Daniel Lobb, Olivier Saint-Pe

Proceedings Volume 2585, (1995) https://doi.org/10.1117/12.227187

KEYWORDS: Prisms, Calibration, Electronics, Short wave infrared radiation, Imaging systems, Staring arrays, Control systems, Spectroscopy, Detector arrays, Infrared imaging

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Dasa (Daimler-Benz Aerospace) currently is in charge of an ESA contract for the PRISM feasibility study, including MATRA MS/France and SIRA/UK. The main PRISM mission objectives are to monitor selected target areas with emphasis on bio-chemical stress analyses which are the subject of changes such as vegetation, in particular deforestation; further areas include glaciers, land/water boundaries, and similar features. The Dasa study team makes use of a similar ESA instrument currently the subject of dedicated subunits technology developments, the HRIS (high resolution imaging spectrometer), also lead by Dasa. Its main features and technology developments are covered in a survey. PRISM is covering most of the HRIS features, i.e., it will have an imaging spectrometer segment for the visible/NIR and the SWIR spectrum (450-2350 nm) as HRIS, but implements four MIR and TIR channels to provide surface temperature data, represented by linear detector arrays (essentially the features of another currently pursued ESA development program designated HRTIR). In a first study phase it also included a novel feature, a wide-angle two-axis pointing system for along- and across-track pointing in order to yield multi-directional reflectance data of dedicated targets, which turned out to be the greatest design driver in the instrument, it was omitted in the later phases. The geometric sampling interval is defined to 50 m (design goal) at 50 km swath. PRISM is currently studied in a feasibility study in a competitive way by two teams, one being lead by Dasa. At the time of the Symposium both studies are completed. The results of the Dasa team are presented. Since PRISM covers most of the HRIS mission it is rather likely that in the case of a successful concept feasibility proof (performance and technology wise), it may later replace the HRIS instrument. It is anticipated that a major part of the technology developments currently performed for HRIS will be utilized -- with some modifications -- for PRISM as well.