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Proceedings Paper

APEX: current status of the airborne dispersive pushbroom imaging spectrometer
Author(s): Michael E. Schaepman; Klaus I. Itten; Daniel R. Schlaepfer; Johannes W. Kaiser; Jason Brazile; Walter Debruyn; Andreas Neukom; Hans Feusi; Peter Adolph; Renzo Moser; Thomas Schilliger; Lieve De Vos; Guido M.L. Brandt; Peter Kohler; Markus Meng; Jens Piesbergen; Peter Strobl; Jose Gavira; Gerd Joachim Ulbrich; Roland Meynart
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Paper Abstract

Over the past few years, a joint Swiss/Belgium ESA initiative resulted in a project to build a precursor mission of future spaceborne imaging spectrometers, namely APEX (Airborne Prism Experiment). APEX is designed to be an airborne dispersive pushbroom imaging spectrometer operating in the solar reflected wavelength range between 4000 and 2500 nm. The system is optimized for land applications including limnology, snow, and soil, amongst others. The instrument is optimized with various steps taken to allow for absolute calibrated radiance measurements. This includes the use of a pre- and post-data acquisition internal calibration facility as well as a laboratory calibration and a performance model serving as a stable reference. The instrument is currently in its breadboarding phase, including some new results with respect to detector development and design optimization for imaging spectrometers. In the same APEX framework, a complete processing and archiving facility (PAF) is developed. The PAF not only includes imaging spectrometer data processing up to physical units, but also geometric and atmospheric correction for each scene, as well as calibration data input. The PAF software includes an Internet based web-server and provides interfaces to data users as well as instrument operators and programmers. The software design, the tools and its life cycle are discussed as well.

Paper Details

Date Published: 2 February 2004
PDF: 9 pages
Proc. SPIE 5234, Sensors, Systems, and Next-Generation Satellites VII, (2 February 2004); doi: 10.1117/12.513745
Show Author Affiliations
Michael E. Schaepman, Univ. Zurich (Switzerland)
Klaus I. Itten, Univ. Zurich (Switzerland)
Daniel R. Schlaepfer, Univ. Zurich (Switzerland)
Johannes W. Kaiser, Univ. Zurich (Switzerland)
Jason Brazile, Univ. Zurich (Switzerland)
Walter Debruyn, Vito (Belgium)
Andreas Neukom, HTS AG (Switzerland)
Hans Feusi, HTS AG (Switzerland)
Peter Adolph, HTS AG (Switzerland)
Renzo Moser, HTS AG (Switzerland)
Thomas Schilliger, HTS AG (Switzerland)
Lieve De Vos, OIP Sensor Systems (Belgium)
Guido M.L. Brandt, OIP Sensor Systems (Belgium)
Peter Kohler, Netcetera Group AG (Switzerland)
Markus Meng, Netcetera Group AG (Switzerland)
Jens Piesbergen, Netcetera Group AG (Switzerland)
Peter Strobl, DLR (Germany)
Jose Gavira, European Space Agency/ESTEC (Netherlands)
Gerd Joachim Ulbrich, European Space Agency/ESTEC (Netherlands)
Roland Meynart, European Space Agency/ESTEC (Netherlands)


Published in SPIE Proceedings Vol. 5234:
Sensors, Systems, and Next-Generation Satellites VII
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda; Joan B. Lurie; Michelle L. Aten, Editor(s)

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