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Recent development in the 3-12 µm radiometric calibration of the DAIS 7915

Strobl, Peter und Zhukov, Boris (1998) Recent development in the 3-12 µm radiometric calibration of the DAIS 7915. In: 1st EARSel Workshop on Imaging Spectroscopy Remote Sensing Laboratories, University of Zurich, Switzerland 6-8 October 1998, Seiten 69-79. 1st EARSel Workshop on Imaging Spectroscopy, Remote Sensing Laboratories, University of Zurich, Switzerland, 6-8 October 1998. ISBN 2-90 885-22-0.

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Kurzfassung

Radiometric calibration of sensors in the thermal infrared region is a critical issue especially for the DAIS 7915. As the scan mechanism of the DAIS is of the Kennedy type, there is a considerable fraction of intrinsic background radiation in the overall signal presented to the detector. The contribution of the background to the total signal increases towards larger scan angles. Until 1998 the 6 Bands in the 8-12 µm region were calibrated using the two external blackbodies of the DAIS operated at different temperatures during airborne data takes. This method did not account for scan angle dependencies other than the theoretical Kennedy intrinsic vignetting. Evaluation of in-flight data made evident that this is method is not satisfactory. The mid infrared band was not calibrated at all due to uncertainties in the estimation of emitted and reflected radiation components of the blackbody and housing. A new approach was therefore developed using a simplified sensor model. This paper presents the calibration strategy, which is based on laboratory measurements. The thermal data are processed and calibrated using laboratory coefficients, blackbody readings and scanner housing temperature measurements. This paper introduces the technique, the algorithm and its implementation. Examples of laboratory and in-flight data are shown together with results of a preliminary in-flight validation.

Dokumentart:Konferenzbeitrag (Paper)
Zusätzliche Informationen: LIDO-Berichtsjahr=1999,
Titel:Recent development in the 3-12 µm radiometric calibration of the DAIS 7915
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Strobl, PeterNICHT SPEZIFIZIERT
Zhukov, BorisNICHT SPEZIFIZIERT
Datum:1998
Erschienen in:1st EARSel Workshop on Imaging Spectroscopy Remote Sensing Laboratories, University of Zurich, Switzerland 6-8 October 1998
Seitenbereich:Seiten 69-79
ISBN:2-90 885-22-0
Status:veröffentlicht
Veranstaltungstitel:1st EARSel Workshop on Imaging Spectroscopy, Remote Sensing Laboratories, University of Zurich, Switzerland, 6-8 October 1998
Veranstalter :EARSel, Paris, 2, avenue Rapp, 75340 PARIS CEDEX 07 - France
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):NICHT SPEZIFIZIERT
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Optoelektronik
Hinterlegt von: elib DLR-Beauftragter
Hinterlegt am:10 Mai 2006
Letzte Änderung:06 Jan 2010 23:16

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