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Technical aspects of Envisat-ASAR geocoding capability at DLR

Huber, Martin and Hummelbrunner, Wolfgang and Raggam, Johannes and Small, David and Kosmann, Detlev (2004) Technical aspects of Envisat-ASAR geocoding capability at DLR. In: Proceedings of the 2004 ENVISAT & ERS Symposium. 2004 ENVISAT & ERS Symposium, 6.-10. Sep. 2004, Salzburg, Austria.

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Official URL: http://earth.esa.int/workshops/salzburg04/

Abstract

Based on experience with the geocoding systems for ERS-D-PAF (GEOS), the SIR-C/X-SAR (GEOS) and SRTM missions (GeMoS), geocoding functionality has been extended for Envisat ASAR data. The existing Envisat ASAR Geocoding System (EGEO) can handle all Level 1-b image products (IMS, APS, IMP, APP, IMM, APM, WSM and GM1). Complementary to geocoded products provided by ESA (IMG, APG) the geocoding procedure applied at the German Aerospace Center (DLR) makes use of a DEM to achieve higher geolocation accuracy. The resulting geocoded image is either defined as EEC (Enhanced Ellipsoid Corrected) or as ETC (Enhanced Terrain Corrected). These products mainly differ in the underlying DEM used for geocoding. The EEC utilizes GLOBE, while the ETC utilizes the “best” DEM available in the data base. This “best” DEM can be assembled from different DEM data sets (e.g. derived from SRTM, ERS, …). Further differences such as the interpolative (EEC) and rigorous (ETC) geocoding approach will also be outlined. Furthermore, an incidence angle mask can be generated. The necessary upgrades for geocoding ASAR stripline products (e.g. IMM, WSM) will be presented. Stripline products cover a large area along track, as they consist of concatenated stand-alone products (“slices”). Thus the updates of relevant parameters have to be taken into account.

Document Type:Conference or Workshop Item (Paper, Poster)
Title:Technical aspects of Envisat-ASAR geocoding capability at DLR
Authors:
AuthorsInstitution or Email of Authors
Huber, MartinDFD-US
Hummelbrunner, WolfgangJoanneum Research, Graz
Raggam, JohannesJoanneum Research, Graz
Small, DavidRSL, Universität Zürich
Kosmann, DetlevDFD-US
Date:September 2004
Journal or Publication Title:Proceedings of the 2004 ENVISAT & ERS Symposium
Refereed publication:No
In ISI Web of Science:No
Status:Published
Keywords:ENVISAT, ASAR, Geocoding, Value Added SAR Products
Event Title:2004 ENVISAT & ERS Symposium
Event Location:Salzburg, Austria
Event Type:international Conference
Event Dates:6.-10. Sep. 2004
Organizer:ESA
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):W - Projekt ENVISAT (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Environment and Security
Deposited By: Martin Huber
Deposited On:22 Feb 2010 09:51
Last Modified:12 Dec 2013 20:51

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