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The Future Spaceborne Hyperspectral Imager EnMAP: Its In-Flight Radiometric and Geometric Calibration Concept

Schneider, Mathias und Müller, Ruppert und Krawczyk, Harald und Bachmann, Martin und Storch, Tobias und Mogulsky, Valery und Hofer, Stefan (2012) The Future Spaceborne Hyperspectral Imager EnMAP: Its In-Flight Radiometric and Geometric Calibration Concept. In: ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XXXIX-B1, Seiten 267-272. Copernicus Publications. XXII ISPRS Congress 2012, 25. Aug. – 01. Sep. 2012, Melbourne, Australia. ISSN doi:10.5194/isprsarchives-XXXIX-B1-267-2012

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Offizielle URL: http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXIX-B1/267/2012/isprsarchives-XXXIX-B1-267-2012.html

Kurzfassung

The German Aerospace Center DLR – namely the Earth Observation Center EOC and the German Space Operations Center GSOC – is responsible for the establishment of the ground segment of the future German hyperspectral satellite mission EnMAP (Environmental Mapping and Analysis Program). The Earth Observation Center has long lasting experiences with air- and spaceborne acquisition, processing, and analysis of hyperspectral image data. In the first part of this paper, an overview of the radiometric in-flight calibration concept including dark value measurements, deep space measurements, internal lamps measurements and sun measurements is presented. Complemented by pre-launch calibration and characterization these analyses will deliver a detailed and quantitative assessment of possible changes of spectral and radiometric characteristics of the hyperspectral instrument, e.g. due to degradation of single elements. A geometric accuracy of 100 m, which will be improved to 30 m with respect to a used reference image, if it exists, will be achieved by ground processing. Therfore, and for the required co-registration accuracy between SWIR and VNIR channels, additional to the radiometric calibration, also a geometric calibration is necessary. In the second part of this paper, the concept of the geometric calibration is presented in detail. The geometric processing of EnMAP scenes will be based on laboratory calibration results. During repeated passes over selected calibration areas images will be acquired. The update of geometric camera model parameters will be done by an adjustment using ground control points, which will be extracted by automatic image matching. In the adjustment, the improvements of the attitude angles (boresight angles), the improvements of the interior orientation (view vector) and the improvements of the position data are estimated. In this paper, the improvement of the boresight angles is presented in detail as an example. The other values and combinations follow the same rules. The geometric calibration will mainly be executed during the commissioning phase, later in the mission it is only executed if required, i.e. if the geometric accuracy of the produced images is close to or exceeds the requirements of 100 m or 30 m respectively, whereas the radiometric calibration will be executed periodically during the mission with a higher frequency during commissioning phase.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:The Future Spaceborne Hyperspectral Imager EnMAP: Its In-Flight Radiometric and Geometric Calibration Concept
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Schneider, Mathiasmathias.schneider@dlr.de
Müller, Ruppertruppert.mueller@dlr.de
Krawczyk, Haraldharald.krawczyk@dlr.de
Bachmann, Martinmartin.bachmann@dlr.de
Storch, Tobiastobias.storch@dlr.de
Mogulsky, ValeryKayser-Threde GmbH, Germany
Hofer, StefanKayser-Threde GmbH, Germany
Datum:24 Juli 2012
Erschienen in:ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Referierte Publikation:Nein
In Open Access:Ja
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:XXXIX-B1
Seitenbereich:Seiten 267-272
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Shortis, M.NICHT SPEZIFIZIERT
El-Sheimy, N.NICHT SPEZIFIZIERT
Verlag:Copernicus Publications
Name der Reihe:ISPRS International Archives
ISSN:doi:10.5194/isprsarchives-XXXIX-B1-267-2012
Status:veröffentlicht
Stichwörter:Geometric Calibration, Radiometric Calibration, Hyper spectral, Satellite
Veranstaltungstitel:XXII ISPRS Congress 2012
Veranstaltungsort:Melbourne, Australia
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:25. Aug. – 01. Sep. 2012
Veranstalter :International Society of Photogrammetry and Remote Sensing
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Projekt EnMap / Bodensegment (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Deutsches Fernerkundungsdatenzentrum > Landoberfläche
Institut für Methodik der Fernerkundung > Photogrammetrie und Bildanalyse
Hinterlegt von: Bärbel Bolowski
Hinterlegt am:15 Okt 2012 07:48
Letzte Änderung:30 Nov 2012 08:22

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