| Titre : |
SAR Interferometry : Programme German Aerospace research establishment, Space congress, Bremen, Germany, May 23, 1995 |
| Type de document : |
Actes de congrès |
| Auteurs : |
European space report, Auteur |
| Editeur : |
Munich : European Space Report |
| Année de publication : |
1995 |
| Conférence : | Space congress 1995, SAR Interferometry 23/05/1995 23/05/1995 Breme Allemagne | | Importance : |
74 p. |
| Format : |
21 x 30 cm |
| ISBN/ISSN/EAN : |
978-3-929663-15-0 |
| Note générale : |
Bibliographie |
| Langues : |
Anglais (eng) |
| Descripteur : |
[Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] bande X
[Termes IGN] image E-SAR
[Termes IGN] image ERS-SAR
[Termes IGN] image radar moirée
[Termes IGN] interféromètrie par radar à antenne synthétique
|
| Résumé : |
(Auteur) A high percentage of the earth's land surface is mountainous terrain. In most of Europe, North America and Japan fairly accurate topographic maps exist. In other parts of the world the accuracy of such maps is seldom sufficient. SAR Interferometry is an efficient method of acquiring digital elevation models of such areas, because of the radar's independence of day/night time and the penetration of radar signals through clouds and even rain. This is especially important for data takes over tropical and polar regions. The principles of synthetic aperture radar (SAR) and of SAR interferometry have been known for several decades but the realisation of a suitable SAR system and its application to SAR interferometry was only possible due to the development of coherent radar technology. The latter's spaceborne SAR systems for remote sensing of the earth were initiated with SEASAT in 1978 followed by SIRA and SIRB, ALMAZ, ERS1, JERS1 and lately the two Radarlab missions SIRC/XSAR in April and October 1994. For multiple path radar interferometry, data from at least two relatively closely spaced orbits (fifty metres to a few hundred metres distance) are necessary . The distance differences between any object within the Interferometric" scene and the SAR moving along the two neighbouring orbits are measured in wavelength and used to produce radar interferograms. Unwrapping of these interferograms results in topographic maps. This method relies on "no change within the scene", even if days or weeks have passed until the second data take is possible. Vegetated areas will in general be different from the time of the first data take and only bare and rocky areas may remain the same. Even in the case of a short time difference wind or rain may alter the configuration and reflectivity in the selected area. |
| Note de contenu : |
INTRODUCTION BY THE CHAIRMAN
Herwig Öttl, German Aerospace Research Establishment DLR, Oberpfaffenhofen, Germany
SPACEBORNE SAR INTERFEROMETRY: PRINCIPLES, SENSORS AND POTENTIALS
Dieter Just, Richard Bamler, German Aerospace Research Establishment DLR, Oberpfaffenhofen, Germany
SAR INTERFEROMETRY : A NEW TOOL FOR GEODESY
Marc Rossi, Didier Massonnet, Hélène Vadon, CNES, Toulouse, France
XSAR INTERFEROMETRY : RESULTS AND ERROR ANALYSIS
Joao Moreira, Marcus Schwâbisch, Richard Bamler, Dieter Just, German Aerospace Research Establishment DLR, Oberpfaffenhofen, Germany ;
G. Fornaro, G. Franceschetti, Università di Napoli, Naples, Italy ;
R. Lanari, Instituto di Ricerca per l'Elettromagnetismo e i Componenti Elettronici IRECECNR, Naples
TOPOGRAPHY DERIVED FROM ERS1 AND XSAR INTERFEROMETRY IN COMPARISON
Marcus Schwäbisch, German Aerospace Research Establishment DLR, Oberpfaffenhofen, Germany
ESAR XBAND INTERFEROMETRY: DESIGN AND FIRST RESULTS
Joao Moreira, German Aerospace Research Establishment DLR, Oberpfaffenhofen, Germany
FREQUENT OBSERVATION OF SURFACE MOTIONS USING SCANSAR AND GEOSAR
Andrea Monti Guamieri, Claudio Prati, F. Rocca, Polftecnico di Milano, Milan, Italy |
| Numéro de notice : |
16573 |
| Affiliation des auteurs : |
non IGN |
| Thématique : |
IMAGERIE |
| Nature : |
Actes |
| Permalink : |
https://documentation.ensg.eu/index.php?lvl=notice_display&id=34813 |
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SAR Interferometry (1995)
