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Proceedings Paper

Calibration methodology for the airborne dispersive pushbroom imaging spectrometer (APEX)
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Paper Abstract

APEX is a dispersive pushbroom imaging spectrometer operating in the spectral range between 380 - 2500 nm. The spectral resolution will be better than 10 nm in the SWIR and < 5 nm in the VNIR range of the solar reflected range of the spectrum. The total FOV will be ± 14 deg, recording 1000 pixels across track with about 300 spectral bands simultaneously. A large variety of characterization measurements will be performed in the scope of the APEX project, e.g., on-board characterization, frequent laboratory characterization, and vicarious calibration. The retrieved calibration parameters will allow a data calibration in the APEX Processing and Archiving Facility (PAF). The data calibration includes the calculation of the required, time-dependent calibration coefficients from the calibration parameters and, subsequently, the radiometric, spectral and geometric calibration of the raw data. Because of the heterogeneity of the characterization measurements, the optimal calibration for each data set is achieved using a special assimilation algorithm. In the paper the different facilities allowing characterization measurements, the PAF and the new data assimilation scheme are outlined.

Paper Details

Date Published: 4 November 2004
PDF: 8 pages
Proc. SPIE 5570, Sensors, Systems, and Next-Generation Satellites VIII, (4 November 2004); doi: 10.1117/12.566364
Show Author Affiliations
Jens Nieke, Univ. Zurich (Switzerland)
Johannes W. Kaiser, Univ. Zurich (Switzerland)
Daniel Schlaepfer, Univ. Zurich (Switzerland)
Jason Brazile, Univ. Zurich (Switzerland)
Klaus I. Itten, Univ. Zurich (Switzerland)
Peter Strobl, DLR (Germany)
Michael E. Schaepman, Wageningen Univ. (Netherlands)
Gerd Joachim Ulbrich, European Space Agency/ESTEC (Netherlands)

Published in SPIE Proceedings Vol. 5570:
Sensors, Systems, and Next-Generation Satellites VIII
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

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