Schroeder, Manfred and Reinartz, Peter and Müller, Rupert (1998) Concept for Absolute Radiometric Calibration of MOMS-2P. In: ISPRS PROCEEDINGS Joint Workshop "Sensors and Mapping form Space", pp. 173-177. ISPRS Joint Workshop "Sensors and Mapping form Space" of Working Groups I/1, I/3 and IV/4, Hannover, Germany, Sept 29-2 Oct, 1997.
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The evaluation of the pre-mission radiometric calibration data of MOMS-2P showed that the derived relative calibration factors depended strongly on the intensity. For this reason the existing laboratory measurements could not be used for absolute calibration. Due to lack of time this problem could not be further investigated before launch. Therefore alternative concepts for radiometric calibration during the mission were considered. For monitoring of the long term radiometric properties of MOMS-2P the inner side of the optics protection cover is coated with spectralon. This spectralon plate acts as diffuse reflector of known spectral reflectance characteristics. By tilting the spectralon plate by 20 degrees with respect to the entrance optics the direct sunlight is reflected into the optics. As the spectrum of the sun is very well known these measurements can be used for absolute calibration. The principles of these measurements will be described and first data will be presented. In addition to the sun calibration an in-field calibration method is in preparation. For this method large ground targets of approx. 100 m in diameter with known spectral reflectance characteristics must be available. During the MOMS-2P overflight the sun irradiance on the ground and the atmospheric transmittance have to be measured. The basic concept of this in-flight calibration method will be presented.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Concept for Absolute Radiometric Calibration of MOMS-2P|
|Journal or Publication Title:||ISPRS PROCEEDINGS Joint Workshop "Sensors and Mapping form Space"|
|Page Range:||pp. 173-177|
|Event Title:||ISPRS Joint Workshop "Sensors and Mapping form Space" of Working Groups I/1, I/3 and IV/4, Hannover, Germany, Sept 29-2 Oct, 1997|
|Organizer:||Prof. G. Konecny, Institute of Photogrammetry and Engineering Surveys, University of Hannover, Nienburger Str. 1, 30167 Hannover, Germany|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Institut für Optoelektronik|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||09 May 2006|
|Last Modified:||06 Jan 2010 23:15|
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