Dr. Horst Schwarzer Profile

Dr. Horst Schwarzer

Scientist at Deutsches Zentrum fuer Luft- und Raumfahrt eV

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Publications (20)

Proceedings Article | 23 September 2013 Paper

sCMOS detector for imaging VNIR spectrometry

Andreas Eckardt, Ralf Reulke, Horst Schwarzer, Holger Venus, Christian Neumann

Proceedings Volume 8870, 88700G (2013) https://doi.org/10.1117/12.2021361

KEYWORDS: Sensors, Signal to noise ratio, Modulation transfer functions, Quantum efficiency, Aerospace engineering, Cameras, Staring arrays, Camera shutters, Interference (communication), Image sensors

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Proceedings Article | 9 October 2008 Paper

Dynamic PSF and MTF measurements on a 9k TDI CCD

Horst Schwarzer, Anko Boerner, Karl-Heinz Degen, Andreas Eckardt, Patrick Scherbaum

Proceedings Volume 7106, 71061F (2008) https://doi.org/10.1117/12.797055

KEYWORDS: Point spread functions, Modulation transfer functions, Satellites, Charge-coupled devices, Sensors, Satellite imaging, Integrated optics, CCD image sensors, Aerospace engineering, Information fusion

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Proceedings Article | 26 September 2007 Paper

Development of a wavelength stabilized seed laser system for an airborne water vapour lidar experiment

H. Schwarzer, A. Börner, A. Fix, B. Günther, H.-W. Hübers, M. Raugust, F. Schrandt, M. Wirth

Proceedings Volume 6681, 66810H (2007) https://doi.org/10.1117/12.728854

KEYWORDS: Laser stabilization, Semiconductor lasers, Absorption, Laser systems engineering, LIDAR, Multiplexers, Control systems, Optical parametric oscillators, Process control, Airborne laser technology

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Proceedings Article | 3 October 2006 Paper

APEX calibration facility: status and first commissioning results

Birgit Suhr, Jochen Fries, Peter Gege, Horst Schwarzer

Proceedings Volume 6361, 636110 (2006) https://doi.org/10.1117/12.689924

KEYWORDS: Calibration, Sensors, Collimators, Optical filters, Monochromators, Mirrors, Spectrometers, Optical spheres, Spectral calibration, Stray light

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Proceedings Article | 10 November 2003 Paper

Resume of seven-year MOS in-orbit calibration: events, effects, and explanations

Horst Schwarzer, Birgit Gerasch, Andreas Neumann, Karl-Heinz Sumnich, Thomas Walzel, Gerhard Zimmermann

Proceedings Volume 5151, (2003) https://doi.org/10.1117/12.502542

KEYWORDS: Calibration, Sun, Molybdenum, Lamps, Sensors, Vignetting, Remote sensing, Charge-coupled devices, Temperature metrology, Satellites

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Proceedings Article | 24 September 2002 Paper

New results of ground-target-based calibration of MOS on IRS

Horst Schwarzer, Bryan Franz, Andreas Neumann, Karl-Heinz Suemnich, Thomas Walzel, Gerhard Zimmermann

Proceedings Volume 4814, (2002) https://doi.org/10.1117/12.451501

KEYWORDS: Calibration, Molybdenum, Reflectivity, Sun, Lamps, Bidirectional reflectance transmission function, Satellites, Sensors, Remote sensing, Scanners

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Proceedings Article | 18 January 2002 Paper

Comparison of vicarious and in-orbit calibrations of the imaging spectrometer MOS

Horst Schwarzer, Karl-Heinz Suemnich, Andreas Neumann, Thomas Walzel, Gerhard Zimmermann

Proceedings Volume 4483, (2002) https://doi.org/10.1117/12.453459

KEYWORDS: Calibration, Sun, Lamps, Molybdenum, Spectroscopy, Remote sensing, Satellites, Diffusers, Scanners, Power supplies

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Proceedings Article | 15 November 2000 Paper

Potentials of combined in-orbit calibration methods demonstrated by the MOS-IRS mission

Horst Schwarzer, Karl-Heinz Suemnich, Andreas Neumann, Thomas Walzel, Gerhard Zimmermann, Dirk Hagelschuer

Proceedings Volume 4135, (2000) https://doi.org/10.1117/12.494257

KEYWORDS: Calibration, Sun, Lamps, Diffusers, Bidirectional reflectance transmission function, Molybdenum, Stray light, Spectroscopy, Optical components, Reflectivity

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In-orbit calibration is an absolutely necessary and accepted tool to update the pre-flight calibration sets of remote sensing instruments on satellites. Only such a periodical recalibration guarantees the long term quality and accuracy of the data and the reliability of the thematic interpretation. Especially for watching global changes of the ocean coastal zones (phytoplancton, sediments, pollution etc.) using spectroradiometric measurements in the VIS/NIR spectral range we need high radiometric accuracy because of small and often only slightly different signals. The Modular Optoelectronic Scanner (MOS) on the Indian Remote Sensing Satellite IRS-P3 has been showing its capacity in this field for more than 4 years. One reason for this success is the sophisticated in-flight calibration using different methods, first an internal parameter check with lamps and second the absolute recalibration with the sun via spectralon diffusers. These two methods together allow the radiometric recalibration with an uncertainty of ± 0.5% with respect to the initial state and enables us in many cases to recognize which opto-electronical component is responsible for which kind of change in different spectral channels and spatial pixels. Radiation stress, satellite and orbit environment, degradation and surface cleaning effects in vacuum are some items which affect the opto-electronical components in different ways. Comparative investigations of some MOS optical components by experimental simulation of the radiation environment in the 820 km IRS sun synchronous orbit for 1, 2, 3 and 10 years radiation load confirm the in-orbit calibration results. The BRDF of the spectralon sun diffuser, the reflectance of anodized aluminum surfaces and the transmission of the front end quartz window did not change by the radiation stress but the transmittance of the front end optics decreases in the blue spectral region up to 10%. These results will be presented together with the in-orbit calibration results of MOS.

Proceedings Article | 28 December 1999 Paper

Experience in in-flight calibration of MOS for three years

Karl-Heinz Suemnich, Horst Schwarzer

Proceedings Volume 3870, (1999) https://doi.org/10.1117/12.373204

KEYWORDS: Calibration, Lamps, Sun, Molybdenum, Diffusers, Charge-coupled devices, Spectroscopy, Aerospace engineering, Reliability, Optoelectronics

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Proceedings Article | 24 September 1999 Paper

Three years of successful in-orbit calibration of the modular optoelectronic scanner (MOS) on the Indian IRS-P3 mission

Horst Schwarzer, Karl-Heinz Suemnich, Andreas Neumann, Thomas Walzel, Gerhard Zimmermann

Proceedings Volume 3750, (1999) https://doi.org/10.1117/12.363542

KEYWORDS: Calibration, Sun, Lamps, Molybdenum, Spectroscopy, Diffusers, Optoelectronics, Scanners, Charge-coupled devices, Sensors

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Proceedings Article | 21 December 1998 Paper

Experience and results of long-term in-orbit sun calibration of the Modular Optoelectronic Scanner (MOS) on the Indian IRS-P3 mission

Horst Schwarzer, Karl-Heinz Suemnich, Andreas Neumann, Thomas Walzel, Gerhard Zimmermann

Proceedings Volume 3498, (1998) https://doi.org/10.1117/12.333643

KEYWORDS: Calibration, Sun, Molybdenum, Diffusers, Stray light, Optoelectronics, Scanners, Sensors, Remote sensing, Aerospace engineering

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Proceedings Article | 31 December 1997 Paper

Imaging spaceborne and airborne sensor systems in the beginning of the next century

Jens Nieke, Horst Schwarzer, Andreas Neumann, Gerhard Zimmermann

Proceedings Volume 3221, (1997) https://doi.org/10.1117/12.298124

KEYWORDS: Imaging systems, Sensors, Data acquisition, Remote sensing, Sensing systems, Hyperspectral imaging, Infrared sensors, Ultraviolet radiation, Infrared imaging, Thermography

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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 | 31 October 1997 Paper

Modular optoelectronic scanner MOS in orbit: results of the in-flight calibration

Karl-Heinz Suemnich, Horst Schwarzer

Proceedings Volume 3118, (1997) https://doi.org/10.1117/12.278932

KEYWORDS: Calibration, Lamps, Sun, Molybdenum, Diffusers, Scanners, Sensors, Optoelectronics, Satellites, Spectroscopy

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Proceedings Article | 13 November 1996 Paper

Calibration of the Modular Optoelectronic Scanner (MOS) flight models

Karl-Heinz Suemnich, Andreas Neumann, Horst Schwarzer, Gerhard Zimmermann

Proceedings Volume 2819, (1996) https://doi.org/10.1117/12.258083

KEYWORDS: Calibration, Sun, Molybdenum, Lamps, Diffusers, Spectrometers, Scanners, Optoelectronics, Data corrections, Aerospace engineering

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Proceedings Article | 12 June 1995 Paper

Polarization monitoring device for the High-Resolution Imaging Spectrometer (HRIS)

Horst Schwarzer, Fritz Blechinger, Alberto Menardi

Proceedings Volume 2480, (1995) https://doi.org/10.1117/12.210872

KEYWORDS: Polarization, Calibration, Spectroscopy, Sensors, Imaging systems, Sun, Image resolution, Radio optics, Aerospace engineering, Remote sensing

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Proceedings Article | 21 December 1994 Paper

Spectroradiometric calibration of the modular optoelectronic scanner

Karl-Heinz Suemnich, Horst Schwarzer

Proceedings Volume 2318, (1994) https://doi.org/10.1117/12.197234

KEYWORDS: Calibration, Sun, Lamps, Molybdenum, Scanners, Control systems, Diffusers, Optoelectronics, Reliability, Sensors

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Proceedings Article | 13 September 1994 Paper

Modular Optoelectronic Scanner (MOS): an imaging spectrometer for remote sensing of the environment

Horst Schwarzer, Karl-Heinz Suemnich

Proceedings Volume 2209, (1994) https://doi.org/10.1117/12.185256

KEYWORDS: Molybdenum, Spectroscopy, Scanners, Aerospace engineering, Remote sensing, Optoelectronics, Calibration, Environmental sensing, Space sensors, Earth's atmosphere

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Proceedings Article | 23 September 1993 Paper

High-resolution imaging spectrometer (HRIS): optics, focal plane, and calibration

Fritz Blechinger, Dave Charlton, Robert Davancens, Bernd Harnisch, Bernd Kunkel, Roland Meynart, Andrea Novi, Eon O'Mongain, Horst Schwarzer, Philip Slater

Proceedings Volume 1937, (1993) https://doi.org/10.1117/12.157058

KEYWORDS: Spectroscopy, Calibration, Short wave infrared radiation, Detector arrays, Modulation transfer functions, Telescopes, Mirrors, Staring arrays, Charge-coupled devices, Radio optics

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Proceedings Article | 23 September 1993 Paper

MOS/PRIRODA: an imaging VIS/NIR spectrometer for ocean remote sensing

Gerhard Zimmermann, Andreas Neumann, Karl-Heinz Suemnich, Horst Schwarzer

Proceedings Volume 1937, (1993) https://doi.org/10.1117/12.157057

KEYWORDS: Spectroscopy, Remote sensing, Calibration, Molybdenum, Aerospace engineering, Ocean optics, Sun, Scanners, CCD cameras, Space operations

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Showing 5 of 20 publications

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