Gottfried Schwarz

Comparison of ECMWF analyses with GPS radio occultations with GRACE (2008)

Schmidt, Torsten, Wickert, Jens, Heise, Stefan, Flechtner, Frank, Fagiolini, Elisa, Schwarz, Gottfried, ...

A validation of ECMWF temperature data and geopotential heights was performed with CHAMP radio occultation data.

The Determination of Representative Errors for the Atmospheric Parameters (2008)

Schmidt, Torsten, Fagiolini, Elisa, Schwarz, Gottfried, Trautmann, Thomas, Wickert, Jens

We outline how to find and analyze atmospheric errors impacting the calculation of the gravtiy field.

Atmospheric Parameters and Geoid Heights: Mathematical Aspects (2008)

Fagiolini, Elisa, Flechtner, Frank, Gruber, Thomas, Schmidt, Torsten, Schwarz, Gottfried, Trautmann, Thomas, ...

Atmospheric data and their assumed uncertainties have physical impact on the gravity field determination. Different sensitivity analysis approaches are described and compared.

Image Information Mining for Earth Observation: A New Era of Technology (2008)

Datcu, Mihai, Schwarz, Gottfried, Seidel, Klaus

Automated image information mining leads to innovative technological concepts.

Optimal Multilooking for Robust SAR Image Indexing (2008)

Schwarz, Gottfried, Espinoza-Molina, Daniela, Breit, Helko, Datcu, Mihai

By adapting SAR parameters one can obtain an optimal multilooking for image indexing.

PIMS: Knowledge based Image Information Mining providing new functionalities in the TerraSAR Ground Segment System (2008)

Mihai Datcu, Gottfried Schwarz, Stephan Kiemle, Amaia De Miguel, Claudio Rosati, Achille Valente, ...

EMail:seidel vision.ee.etthz.ch The paper presents the architecture and new functionalities implemented for the TerraSAR-X ground segment system by the synergy of DIMS (DLR’s Data and Information...

Image Information Mining: Perspectives seen by DLR (2008)

Schwarz, Gottfried, Mihai, Datcu

We describe potential advances in image information mining as seen from a DLR perspective.

Phase information contained in meter-scale SAR images (2007)

Datcu, Mihai, Schwarz, Gottfried, Soccorsi, Matteo, Chaabouni, Houda

We describe phase patterns contained in single look complex SAR images and we provide a "cooking recipe" of how to analyze existing phase patterns that extend over neighboring pixels.

The case of PIMS: image information mining in a SAR data ground segment (2007)

Schwarz, Gottfried, De Miguel, Amaia, Datcu, Mihai

We describe PIMS, a system permitting automated image information mining in a SAR data ground segment.

The Sensitivity of Satellite Gravity Field Determination to Uncertainties in Atmospheric Models (2007)

Fagiolini, Elisa, Zenner, Lieselotte, Flechtner, Frank, Gruber, Thomas, Schwarz, Gottfried, Trautmann, Thomas, ...

Gravity field computations depend on the accuracy of various atmospheric input data. We perform sensitivity calculations with respect to surface pressure, temperature, and humidity profiles.

The Earth Observation Image Librarian (2007)

Datcu, Mihai, Schwarz, Gottfried

The Image Librarian represents a planned tool for automated image information mining.

PIMS: Knowledge based Image Information Mining providing new functionalities in the TerraSAR Ground Segment System (2007)

Datcu, Mihai, Schwarz, Gottfried, Kiemle, Stephan, De Miguel, Amaia, Colapicchioni, Andrea, Rosati, Claudio, ...

The paper presents the architecture and new functionalities implemented for the TerraSAR-X ground segment system by the synergy of DIMS (DLR’s Data and Information Management System) and KIM...

The Impact of Uncertainties of global Atmosphere Models on the Gravity Field Determination with GRACE (2007)

Zenner, Lieselotte, Fagiolini, Elisa, Flechtner, Frank, Gruber, Thomas, Schwarz, Gottfried, Trautmann, Thomas, ...

The data of atmospheric models entering gravity field computations contain errors. The implications of these errors will be presented.

Progress and perspectives of information extraction from high resolution SAR data (2007)

Datcu, Mihai, Schwarz, Gottfried, Chaabouni, Houda, Soccorsi, Matteo

We compare previous spaceborne SAR missions with new high resolution missions. The 1 m resolution limit calls for new processing techniques taking into account man-made scatterers.

Knowledge Centred Earth Observation: Feature Extraction (2007)

De Miguel, Amaia, Colapicchioni, Andrea, Schwarz, Gottfried, Datcu, Mihai

Knowledge centred Earth Observation leads to specific software structures and components. We describe a feature extraction approach relying on a suoort vector machine.

From Scientific Theory to Application Results: Analysis of Urban Structures (2007)

Schwarz, Gottfried

The presentation summarizes successful activities of the CNES / DLR / Télécom Paris Competence Centre with regard to analysis and interpretation of urban scenes.

Comet Ikeya-Zhang (C/2002 C1): Determination of the Rotation Period From Obervations of Morphological Structures (2007)

Manzini, Federico, Schwarz, Gottfried, Cosmovici, Cristiano, Guaita, Cesare, Comolli, L., Brunati, A., ...

High quality CCD images allowed the identification of several morphological structures near the nuclear zone of comet Ikeya-Zhang. The interpretation of these structures led to an estimate of its...

The high-resolution stereo camera (HRSC) experiment on Mars Express: Instrument aspects and experiment conduct from interplanetary cruise through nominal mission (2007)

Jaumann, R., Neukum, G., Behnke, T., Duxbury, T. C., Eichentopf, K., Flohrer, J., ...

ESA's Mars Express has successfully completed its nominal mission of one Martian year covering about 25% of the surface in stereo and color with resolutions up to 10 m/pixel by its high-resolution...

A Comparison of Image Time Series Algorithms (2007)

Schwarz, Gottfried

Typical image time series algorithms are compared and assessed.

Use of a Maximum Entropy Method as a Regularization Technique during the Retrieval of Trace Gas Profiles from Limb Sounding Measurements (2006)

Steinwagner, Jörg, Schwarz, Gottfried, Hilgers, Siegfried

We compare regularization techniques during the retrieval of trace gas profiles from limb sounding measurements. In particular, we investigate the performance of a dedicated maximum entropy method.

Profile Retrieval from MetOp Nadir Sounders: Inversion by Tikhonov Regularization and Verification Methodology (2006)

Schreier, Franz, Doicu, Adrian, Schwarz, Gottfried, Böckmann, Christine

An advanced mathematical methodology for efficient Tikhonov-type inversion of MetOp nadir sounder observations is proposed. Key issues such as optimal regularization matrix and parameter selection,...

Shape-dependent regularization for the retrieval of atmospheric state parameter profiles (2006)

Steinwagner, Jörg, Schwarz, Gottfried

An adaptive regularization approach for the retrieval of vertical state parameter profiles is presented.

Information Extraction for Satellite-Based Disaster Monitoring - Current Issues and Expected Progress (2006)

Schwarz, Gottfried, Soccorsi, Matteo, Chaabouni, Houda, Datcu, Mihai

We give a survey of promising algorithms for the handling of information extraction for satellite-based disaster monitoring

Image Classification Using a Support Vector Machine (2006)

Chaabouni, Houda, Datcu, Mihai, Schwarz, Gottfried, Soccorsi, Matteo

We give a survey how to apply a super vector machine for image classification

MIPAS Data Quality - Lessons Learned (2006)

Schwarz, Gottfried, Hilgers, Siegfried

we outline how data quality of the MIPAS products can be monitored.

Mars Express DTM Comparisons (2005)

Gwinner, Klaus, Hauber, Ernst, Oberst, Jürgen, HRSC Instrument Team, Schwarz, Gottfried

The attainable quality of Martian DTMs based on HRSC image data was demonstrated.

COBI: Klimatologische Wasserdampfprofile aus MIPAS-Daten (2005)

Schwarz, Gottfried, Drescher, Armin, Ponater, Michael, Sausen, Robert, Burkhardt, Ulrike

Gezeigt werden aus MIPAS-Daten abgeleitete Monatsmittelwertprofile von Wasserdampf und Temperatur. Diese Mittelwertprofile liegen für verschiedene Breiten- und Längenzonen vor und zeigen deutliche...

The Performance of HRSC's Super Resolution Channel (SRC) (2005)

Oberst, Jürgen, Schwarz, Gottfried, Behnke, Thomas, Hirsch, Helmut, Hoffmann, Harald, Jaumann, Ralf, ...

We describe the performance of the Super Resolution Channel (SRC) of the High Resolution Stereo Camera (HRSC) bein flown on ESA's Mars Express mission. In addition, the basic characteristics of this...

The performance of HRSC's Super Resolution Channel (SRC) (2005)

Oberst, Jürgen, Schwarz, Gottfried, Behnke, Thomas, Hirsch, Helmut, Matz, Klaus-Dieter, Flohrer, Joachim, ...

We describe the performance of the Super Resolution Channel (SRC) of the High Resolution Stereo Camera (HRSC) being flown on ESA's Mars Express mission. In addition, the basic characteristics of this...

Der Cold Bias in Modellen der Allgemeinen Atmosphärischen Zirkulation (2005)

Sausen, Robert, Brinkop, Sabine, Burkhardt, Ulrike, Egger, Joseph, Gesell, Gerhard, Hildenbrand, Beate, ...

Es wird ein Überblick über Motivation, Ziel, Beispiele, Resultate, Sensitivitäten und Veröffentlichungen bei COBI gegeben.

Analysis of Methane Isopleths using MIPAS Data (2004)

Schwarz, Gottfried, Hilgers, Siegfried, Drescher, Armin

Geographische Unterschiede in Methan-Isoplethen sind in den Daten des Instruments MIPAS klar zu erkennen.

Performance Verification of Two ENVISAT Limb Sounding Processors (2004)

Hilgers, Siegfried, Schwarz, Gottfried, Slijkhuis, Sander

Ein Vergleich von zwei Limb-Sounding-Prozessoren für zeigt typische Gemeinsamkeiten und Unterschiede.

ENVISAT CalVal Support: MIPAS Level 2: Enhanced Simulations and Retrieval Analysis (2004)

Schwarz, Gottfried

Das Retrieval von Spurengas-Profilen aus MIPAS-Daten lässt sich effizient in speziellen Räumen durchführen

Advanced MIPAS-Level-2 Data Analysis (AMIL2DA) (2003)

Clarmann Von, Thomas, Birk, Manfred, Bovensmann, Heinrich, Bracher, Astrid, Burgess, Alastair, Cecherini, Simone, ...

The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), which is a core instrument of the Envisat polar platform launched on 1 March 2002 by the European Space Agency (ESA), is a...

A blind test retrieval experiment for infrared limb emission spectrometry (2003)

Clarmann Von, Thomas, Ceccherini, Simone, Doicu, Adrian, Dudhia, Anu, Funke, Bernd, Grabowski, U., ...

The functionality and characteristics of six different data processors (i.e., retrieval codes in their actual software and hardware environment) for analysis of high-resolution limb emission infrared...

Retrieval of Heavy Molecule Profiles from MIPAS Data Using a Multi-Scale Approach (2003)

Schwarz, Gottfried, Hilgers, Siegfried

Zum Retrieval von Profilen schwerer Moleküle aus MIPAS-Daten bietet sich ein Multi-Skalen-Ansatz an.

Cost/Performance Comparisons of Joint Temperature and Water Vapour Retrievals from MIPAS Data (2003)

Hilgers, Siegfried, Schwarz, Gottfried

Mehrere Alternativen bieten sich für ein gemeinsames Retrieval von Temperatur und Wasserdampfprofilen aus MIPAS-Daten an. Diese werden verglichen.

MIPAS Level 2 Offline Functionalities (2003)

Schwarz, Gottfried

Die Offline-Prozessierung von MIPAS Level 2 bietet eine Reihe von verfügbaren Optionen.

Intercomparison of MIPAS/ENVISAT Measurements with Simulations and Co-Located Measurements (2003)

Schwarz, Gottfried

Es werden wesentliche Effekte, die die Datenqualität von MIPAS beeinträchtigen, beschrieben.

Results of Enhanced MIPAS Retrievals (2003)

Schwarz, Gottfried

Es werden verbesserte Strategien für das Retrieval von Spurengasvertikalprofilen aus MIPAS-Daten beschrieben.

Validierung von MIPAS-Profilen (2003)

Schwarz, Gottfried

Es werden die wesentlichen Schritte zu einer Validierung von MIPAS-Daten gezeigt.

COBI - Wasserdampf Beobachtungsdaten (2003)

Schwarz, Gottfried

Zur Vermeidung des Cold Bias wird eine Wasserdampfklimatologie zusammengestellt.

Atmosphärenfernerkundung mit ENVISAT (2002)

Thomas, Werner, Schwarz, Gottfried, Von Bargen, Albrecht

Generelle Übersicht für Nutzer über die Fernerkundung der Erdatmosphäre mit Hilfe der Sensoren GOMOS, MIPAS und SCIAMACHY auf ENVISAT

Sequential and Joint Retrieval of Trace Gas Profiles (2002)

Schwarz, Gottfried, Hilgers, Siegfried, Kemnitzer, Holger, Steck, Tilman, Clarmann Von, Thomas, Höpfner, Michael, ...

A purely sequential retrieval of trace gas profiles from limb sounding measurements may lead to error propagation, especially in the case of water vapor retrieval. A joint (i.e. simultaneous)...

Experiments with Height-Dependent Parameterizations for Limb Profile Retrievals (2002)

Schwarz, Gottfried, Hilgers, Siegfried

The retrieval of vertical trace gas profiles from limb sounding measurements offers the chance for a number of height-dependent parameterizations. Among them basis functions can be used for the...

Stepwise Adaptation of Retrieval Vectors for Limb Profile Retrievals (2002)

Hilgers, Siegfried, Schwarz, Gottfried

The retrieval of vertical trace gas profiles from limb sounding measurements can be accelerated considerably if the usual iterations will be computed with a minimum number of parameters. The...

Trace Gas Retrieval Including Horizontal Gradients (2002)

Kemnitzer, Holger, Hilgers, Siegfried, Schwarz, Gottfried, Steck, Tilman, Clarmann Von, Thomas, Höpfner, Michael, ...

Der Einfluss horizontaler Gradienten auf das Retrieval von Vertikalprofilen wird demonstriert und analysiert.

Advanced MIPAS Level 2 Data Processing (AMIL2DA) (2001)

Clarmann Von, Thomas, Hilgers, Siegfried, Schreier, Franz, Schwarz, Gottfried

First results of the AMIL2DA project show that various processors available for the retrieval of special constituents from MIPAS data deliver comparable results. Remaing differences are mainly due to...

Experience Gained with the MIPAS Level 2 Off-Line Processor (2001)

Hilgers, Siegfried, Kemnitzer, Holger, Ressel, Klaus, Schwarz, Gottfried, Steck, Tilman, Clarmann Von, Thomas, ...

Performance tests of the MIPAS level 2 off-line processor led to in-depth experiences with retrieval options and performance characteristics. These depend on various parameters like microwindows,...

Modelling of the Attainable Resolution of Vertical Details from Limb Sounding Observations (2001)

Schwarz, Gottfried, Hilgers, Siegfried, Kemnitzer, Holger

The presentation compares the attainable vertical resolution (i.e. resolution of vertical details) of atmospheric trace gas profiles obtained by modelling of limb sounding observations. In essence, a...

Use of Selected Initial Guesses for the Retrieval of Trace Gas Profiles (2001)

Schwarz, Gottfried, Hilgers, Siegfried

As a rule, the retrieval of trace gas profiles from atmospheric data sets is based on iterative methods. These iterative methods require initial guess profiles. Simulations showed that tropopause...

Impact of Alternative Matrix Structures on Retrieved Trace Gas Profiles (2001)

Hilgers, Siegfried, Schwarz, Gottfried, Drescher, Armin

We demonstrate how an adaptation of the retrieval vector can be used to reduce memory consumption and run time during the retrieval of trace gas profiles. At the same time. a clever selection of the...

Comet Hale-Bopp (C/1995 O1): UVSTAR-FUV Spectroscopy from the Shuttle (2001)

Cosmovici, Cristiano B., Bratina, Vojko, Schwarz, Gottfried, Tozzi, Gian Paolo, Mumma, Michael J., Stalio, Roberto

Es wird die Entdeckung von N2 in den UV-Spektren des Kometen Hale-Bopp beschrieben und die Wasserproduktionsrate hergeleitet. Ein Nachweis von Argon ist schwierig, das Signal-/Rauschverhältnis nicht...

Trace Gas Retrieval Including Horizontal Gradients (2000)

Kemnitzer, Holger, Hilgers, Siegfried, Schwarz, Gottfried, Steck, Tilman, Clarmann Von, Thomas, Höpfner, Michael, ...

The results of trace gas retrievals of limb sounding measurements will be affected by a horizontally inhomogeneous atmosphere. In this case, the horizontal gradients should be included in the...

Sequential and Joint Retrieval of Trace Gas Profiles (2000)

Schwarz, Gottfried, Hilgers, Siegfried, Kemnitzer, Holger, Steck, Tilman, Clarmann Von, Thomas, Höpfner, Michael, ...

We demonstrate that a joint (i.e. simultaneous) retrieval of atmospherical trace gases from limb sounding measurements can outperform a purely sequential retrieval of the same trace gases. The reason...

Tools for the Analysis of Residual Spectra Affecting MIPAS Level 2 Products (2000)

Hilgers, Siegfried, Kemnitzer, Holger, Schwarz, Gottfried, Clarmann Von, Thomas, Milz, Mathias

The use of various automated tools was shown that allow the identification and quantitative analysis of residual spectra resulting after a retrieval of trace gas profiles. The tools include...

Experience Gained with the MIPAS Level 2 Off-Line Processor (2000)

Hilgers, Siegfried, Kemnitzer, Holger, Ressel, Klaus, Schwarz, Gottfried, Steck, Tilman, Clarmann Von, Thomas, ...

The experience gained with the MIPAS level 2 offline processor will be described. In particular, the layout of the processor will be explained and results for various trace gas retrievals will be...

Experience Gained with the MIPAS Level 2 Off-Line Processor (2000)

Hilgers, Siegfried, Kemnitzer, Holger, Ressel, Klaus, Schwarz, Gottfried, Steck, Tilman

An overview of important results originating from the development of the MIPAS level 2 off-line processor will be given. These results include software design aspects, algorithmic details,...

High Resolution Imaging Methods: A Comparison of Optical and SAR techniques, (1998)

Schwarz, Gottfried, Datcu, Mihai

We compare high resolution imaging methods based on optical and SAR techniques. We demonstrate the pros and cons of specific optical and SAR methods, parameters, and experiences.

Wavelets: Potential Application in Remote Sensing. (1996)

Datcu, Mihai, Schwarz, Gottfried

The presentaion summarizes potential applications of wavelets in the field of remote sensing.

Die deutsche Kamera auf der Mission Mars '96. (1996)

Proetel, K., Bärwald, W., Carsenty, U., Eichentopf, K., Gardy, K., Govaers, S., ...

Fuer die russische Mission Mars'96 wurden zwei deutsche Kameras entwickelt. Deren Konzeption sowie das zugehoerige Bodendatensystem wurde vorgestellt.

Goals and Perspectives for Future Lunar Imaging from Orbit (1996)

Hoffmann, H., Neukum, Gerhard, Schwarz, Gottfried

Imaging of the Lunar surface will be one of the major goals for future lunar orbiter missions. The Moon is an important target for comperative planetological studies.

The Experiments HRSC and WAOSS on the Russian Mars 94/96 Missions. (1996)

Neukum, Gerhard, Carsenty, U., Eichentopf, K., Hoffmann, H., Jaumann, R., Oberst, J., ...

The paper gives an overview of the scientific objectives of the camera experiments and the basic instrument design parameters.

Experiences Gained with the Image Data Compression Electronics of the High Resolution Stereo Camera on Mars '96. (1996)

Schwarz, Gottfried, Reck, Christoph

Image data recoprded by CCD sensors have to be compressed on-line. The data compression electronics has to sustain input data rates of up to 50 Mbps. The design of the compression electronics will be...

The Experiments HRSC and WAOSS on the Russian Mars 94/96 Missions (1996)

Neukum, Gerhard, Carsenty, U., Eichentopf, K., Hoffmann, H., Jaumann, R., Oberst, J., ...

The two German cameras High Resolution Stereo Camera (HRSC) and Wide Angle Optoelectronic Stereo Scanner (WAOSS) will be flown on the Russian Mars missions. The paper gives an overview about the...

The High Resolution Stereo Camera (HRSC): An Advanced-Technology Light-weight Pushbroom Camera for Planetary Orbiters (1995)

Neukum, Gerhard, Jaumann, R., Hoffmann, H., Schwarz, Gottfried, Oberst, J., Pischel, R:

The High Resolution Camera (HRSC) comprises 9 CCD line sensors mounted in parallel for simultaneous high-resolution, stereo, multi-color and multi-phase imaging in the pushbroom mode. The image...

The Multiple Line Scanner Experiment for the Russian Mars 96 Mission:Status Report and Prospects for the Future (1995)

Neukum, Gerhard, Oberst, J., Schwarz, Gottfried, Flohrer, J., Sebastian, I., Jaumann, R., ...

A Russian spacecraft will be launched to Mars in November 1996.Two German multiple line scanners on board, HRSC (High Resolution Stereo Camera) and WAOSS (Wide Angle Optoelectronic Stereo Scanner),...

Multifunctional Stereo Imaging Camera System for Wide Angle and High Resolution Stereo and Color Observations on the Mars 94 Mission. (1990)

Oertel, Dieter, Schmidt, Kurt, Schwarz, Gottfried

The Wide-Angle Opto-Electronic Stereo Scanner (WAOSS) and the High Resolution Stereo Camera (HRSC) are the remote sensing cameras on the Mars 94 orbiter. They will allow to image Mars down to 10 m...

Model Calculations for a Pushbroom Stereo Camera - The Case of the Mars 94 High Resolution Stereo Camera (HRSC) (1990)

Buma, M., Henkner, J., Schwarz, Gottfried

Report is a guideline for the understanding of the complex relationships between the requirements and the design parameters of a stereo camera for planetary remote sensing. The model calculations...