Sensors (Oct 2008)

APEX - the Hyperspectral ESA Airborne Prism Experiment

  • Koen Meuleman,
  • Edoardo Alberti,
  • Jens Nieke,
  • Petra D’Odorico,
  • Yves Bühler,
  • Tobias Kellenberger,
  • Jürg Schopfer,
  • Silvia Huber,
  • Felix Seidel,
  • Daniel Odermatt,
  • Daniel Schläpfer,
  • Mathias Kneubühler,
  • Andreas Hueni,
  • Francesco Dell’Endice,
  • Klaus I. Itten

DOI
https://doi.org/10.3390/s8106235
Journal volume & issue
Vol. 8, no. 10
pp. 6235 – 6259

Abstract

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The airborne ESA-APEX (Airborne Prism Experiment) hyperspectral mission simulator is described with its distinct specifications to provide high quality remote sensing data. The concept of an automatic calibration, performed in the Calibration Home Base (CHB) by using the Control Test Master (CTM), the In-Flight Calibration facility (IFC), quality flagging (QF) and specific processing in a dedicated Processing and Archiving Facility (PAF), and vicarious calibration experiments are presented. A preview on major applications and the corresponding development efforts to provide scientific data products up to level 2/3 to the user is presented for limnology, vegetation, aerosols, general classification routines and rapid mapping tasks. BRDF (Bidirectional Reflectance Distribution Function) issues are discussed and the spectral database SPECCHIO (Spectral Input/Output) introduced. The optical performance as well as the dedicated software utilities make APEX a state-of-the-art hyperspectral sensor, capable of (a) satisfying the needs of several research communities and (b) helping the understanding of the Earth’s complex mechanisms.

Keywords