Mr. Markus Knapek Profile

Markus Knapek

at DLR Standort Oberpfaffenhofen

SPIE Involvement:

Author

Publications (9)

Proceedings Article | 24 February 2009 Paper

Optical data downlinks from Earth observation platforms

D. Giggenbach, J. Horwath, M. Knapek

Proceedings Volume 7199, 719903 (2009) https://doi.org/10.1117/12.811152

KEYWORDS: Sensors, Adaptive optics, Satellites, Atmospheric optics, Clouds, Forward error correction, Receivers, Fourier transforms, Data communications, Telecommunications

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Proceedings Article | 25 September 2007 Paper

Optical high-capacity satellite downlinks via high-altitude platform relays

Markus Knapek, Joachim Horwath, Florian Moll, Bernd Epple, Nicolas Courville, Hermann Bischl, Dirk Giggenbach

Proceedings Volume 6709, 67090E (2007) https://doi.org/10.1117/12.734053

KEYWORDS: Satellites, Medium wave, Relays, Clouds, Antennas, Microwave radiation, Modulation, Satellite communications, Atmospheric optics, Telecommunications

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Proceedings Article | 25 September 2007 Paper

Wavelength selection criteria and link availability due to cloud coverage statistics and attenuation affecting satellite, aerial, and downlink scenarios

Florian Moll, Markus Knapek

Proceedings Volume 6709, 670916 (2007) https://doi.org/10.1117/12.734269

KEYWORDS: Clouds, Signal attenuation, Satellites, Absorption, Particles, Atmospheric particles, Refractive index, Statistical analysis, Mie scattering, Satellite imaging

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Proceedings Article | 13 February 2007 Paper

Tracking and pointing characteristics of OICETS optical terminal in communication demonstrations with ground stations

Yoshihisa Takayama, Takashi Jono, Morio Toyoshima, Hiroo Kunimori, Dirk Giggenbach, Nicolas Perlot, Markus Knapek, Koichi Shiratama, Junya Abe, Katsuyoshi Arai

Proceedings Volume 6457, 645707 (2007) https://doi.org/10.1117/12.708417

KEYWORDS: Sensors, Optical antennas, Optical communications, Optical tracking, Satellites, Laser communications, Aerospace engineering, Satellite communications, Communication engineering, Sun

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Proceedings Article | 12 February 2007 Paper

Results of the optical downlink experiment KIODO from OICETS satellite to optical ground station Oberpfaffenhofen (OGS-OP)

N. Perlot, M. Knapek, D. Giggenbach, J. Horwath, M. Brechtelsbauer, Y. Takayama, T. Jono

Proceedings Volume 6457, 645704 (2007) https://doi.org/10.1117/12.708413

KEYWORDS: Scintillation, Satellites, Telescopes, Cameras, Clouds, Sensors, Adaptive optics, Aerospace engineering, Optical testing, Free space optical communications

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Proceedings Article | 1 September 2006 Paper

Measurements of the beam-wave fluctuations over a 142 km atmospheric path

N. Perlot, D. Giggenbach, H. Henniger, J. Horwath, M. Knapek, K. Zettl

Proceedings Volume 6304, 63041O (2006) https://doi.org/10.1117/12.681207

KEYWORDS: Scintillation, Receivers, Telescopes, Adaptive optics, Turbulence, Lanthanum, Transmitters, Atmospheric optics, Wavefront distortions, Wavefronts

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Proceedings Article | 1 September 2006 Paper

The DLR ground station in the optical payload experiment (STROPEX): results of the atmospheric measurement instruments

Markus Knapek, Joachim Horwath, Nicolas Perlot, Brandon Wilkerson

Proceedings Volume 6304, 63041U (2006) https://doi.org/10.1117/12.679004

KEYWORDS: Turbulence, Atmospheric optics, Telescopes, Motion measurement, Scintillation, Optical communications, Atmospheric turbulence, Cameras, Receivers, Free space optics

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Proceedings Article | 1 September 2006 Paper

Broadband backhaul communication for stratospheric platforms: the stratospheric optical payload experiment (STROPEX)

Joachim Horwath, Markus Knapek, Bernhard Epple, Martin Brechtelsbauer, Brandon Wilkerson

Proceedings Volume 6304, 63041N (2006) https://doi.org/10.1117/12.680824

KEYWORDS: Free space optics, Optical communications, Telecommunications, Optical fabrication, Cameras, Clouds, Electronics, Broadband telecommunications, Optical tracking, Turbulence

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Proceedings Article | 18 April 2005 Paper

Coherent transmission feasibility analysis

Joachim Horwath, Florian David, Markus Knapek, Nicolas Perlot

Proceedings Volume 5712, (2005) https://doi.org/10.1117/12.589196

KEYWORDS: Signal to noise ratio, Satellites, Receivers, Turbulence, Atmospheric modeling, Atmospheric optics, Atmospheric propagation, Numerical simulations, Oscillators, Homodyne detection

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Showing 5 of 9 publications

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